2013 BMW 328I Manufacturer communications & TSBs.Page 2
Original record summaries, dates and identifiers for this model-year. Records 101–200 of 633, ordered newest first. Dated records on this page: May 1, 2017–May 1, 2019.
Read the applicability before drawing a conclusion.
This archive includes service bulletins, warranty notices, software instructions and other communications. Records may repeat or supersede earlier instructions. A model-year association is not proof that a document covers every engine, trim, VIN or reported symptom, or that a repair is free.
NHTSA download snapshot: Sep 28, 2026. These are communication associations for this vehicle, not unique defects. How records are joined and counted.
May 1, 2019Service Bulletin/Repair Instructions
B610619
NHTSA communication ID: 10161567
NHTSA source summary · Original PDF not reviewed by Recallfolio
HIGH VOLTAGE DIAGNOSTIC SPECIALIST TRAINING AND EQUIPMENT STRATEGY. INFORMATION The ST1821 High Voltage Diagnostic Specialist Certification (HVS) is the next step in the E-mobility service strategy for BMW technicians.
NHTSA source summary · Original PDF not reviewed by Recallfolio
NOISES FROM THE FUEL TANK AT IDLE AND WITH LOW FUEL LEVEL. While driving slowly with low RPM or while idling a faint knocking or fluttering noise can be heard from inside the fuel tank. The customer may describe this noise as a "helicopter" noise from the rear of the vehicle.
NHTSA source summary · Original PDF not reviewed by Recallfolio
DELIVERY STOP: PROGRAM CONTROL UNITS (DME). A Delivery Stop has been issued (effective May 16 2019) on certain Model Year 2016-2020 BMW vehicles that have been produced between June 19 2015 and April 17 2019. A software error within the Digital Motor Electronics (DME) may cause a miscalculation of an onboard diagnostic (OBD) function. All vehicles will need a software update (no parts required).
Source components: ELECTRICAL SYSTEM:SOFTWARE · ENGINE AND ENGINE COOLING.
NHTSA source summary · Original PDF not reviewed by Recallfolio
FAULT 118002 - MIXTURE TOO RICH SETS DURING WINTER WITH COLD AMBIENT TEMPERATURES. The Service Engine Soon (MIL) light is on with the following fault stored in the Digital Motor Electronics (DME). In the situation being described the fault is primarily stored during the cold winter months along with the use of winter fuel.
Source components: ELECTRICAL SYSTEM · ENGINE AND ENGINE COOLING.
NHTSA source summary · Original PDF not reviewed by Recallfolio
The Low Washer Fluid Warning Light is illuminated when the Washer Fluid Tank is Full This Service Information bulletin supersedes SI B61 23 15 dated April 2016.
NHTSA source summary · Original PDF not reviewed by Recallfolio
DELIVERY STOP: REWORK TAIL LIGHTS. The tail light mounting brackets may be cracked or broken. During assembly oil may have contaminated the plastic housing of the rear tail lamps causing damage to the mounting points of the tail light assembly.
NHTSA source summary · Original PDF not reviewed by Recallfolio
TAKATA AIR BAG RECALL-RELATED SHORT-TERM ALTERNATE TRANSPORTATION AND CONSEQUENTIAL REPAIRS This Service Information bulletin supersedes SI B01 31 18 dated October 2018.
NHTSA source summary · Original PDF not reviewed by Recallfolio
The Low Washer Fluid Warning Light is illuminated when the Washer Fluid Tank is Full This Service Information bulletin supersedes SI B61 23 15 dated April 2016.
NHTSA source summary · Original PDF not reviewed by Recallfolio
TAKATA AIR BAG RECALL-RELATED SHORT-TERM ALTERNATE TRANSPORTATION AND CONSEQUENTIAL REPAIRS This Service Information bulletin supersedes SI B01 31 18 dated October 2018.
NHTSA source summary · Original PDF not reviewed by Recallfolio
DELIVERY STOP: REWORK TAIL LIGHTS. The tail light mounting brackets may be cracked or broken. During assembly oil may have contaminated the plastic housing of the rear tail lamps causing damage to the mounting points of the tail light assembly.
NHTSA source summary · Original PDF not reviewed by Recallfolio
PHONE CALL AUDIO AUTONOMOUSLY SWITCH FROM VEHICLE TO PHONE. During an active phone call the call audio autonomously switches from the vehicle hands-free system to the phone.
Source components: ELECTRICAL SYSTEM · EQUIPMENT · EQUIPMENT:ELECTRICAL.
NHTSA source summary · Original PDF not reviewed by Recallfolio
NBT EVO CHANGES BETWEEN SELECTIONS BY ITSELF WITHOUT DRIVER INPUT- GHOST BEHAVIOR. The Central Information Display (CID) changes between selections (ghost behavior) and sounds an audio tone without the CID Screen being touched.
Source components: ELECTRICAL SYSTEM · EQUIPMENT · EQUIPMENT:ELECTRICAL.
NHTSA source summary · Original PDF not reviewed by Recallfolio
DELIVERY STOP: REWORK TAIL LIGHTS. The tail light mounting brackets may be cracked or broken. During assembly oil may have contaminated the plastic housing of the rear tail lamps causing damage to the mounting points of the tail light assembly.
NHTSA source summary · Original PDF not reviewed by Recallfolio
SERVICE ACTION: SECURE UNDERBODY PANELING. Over time the mounting clips may fail allowing the center underbody panel to become loose. The mounting clips were not sufficiently hardened during production.
NHTSA source summary · Original PDF not reviewed by Recallfolio
STEERING GEAR MOVEMENT NOT SMOOTH. Stiff movement in the steering or sticks when steering from one limit position to the other Unfavorable software of the Electric Power Steering (EPS)
NHTSA source summary · Original PDF not reviewed by Recallfolio
SERVICE ACTION: REWORK THE STEERING GEAR. Screws attaching the power pack to the steering gear may be broken. Broken screws result in noises during steering motions and variable steering assistance. Check Control Message (CCM) may be displayed.
NHTSA source summary · Original PDF not reviewed by Recallfolio
BLACK SPOT IN THE CENTRAL INFORMATION. This Service Information bulletin replaces SI B62 11 18 dated January 2019. Whats New: â?¢ Warranty section - Programming information added. A small black spot remains on the Central Information Displays (CID) illuminated screen which does not go away after a key cycle or sleep mode.
NHTSA source summary · Original PDF not reviewed by Recallfolio
SEAT THIGH SUPPORT UPHOLSTERY IS PROTRUDING. The upholstery may dislodge slightly from the thigh support base over time from repeated compression due to normal use.
NHTSA source summary · Original PDF not reviewed by Recallfolio
FAULT 118002 - MIXTURE TOO RICH SETS DURING WINTER WITH COLD AMBIENT TEMPERATURES. The Service Engine Soon (MIL) light is on with the following fault stored in the Digital Motor Electronics (DME). Fault: 118002 - Mixture too rich In the situation being described.
Source components: ENGINE · ENGINE AND ENGINE COOLING.
NHTSA source summary · Original PDF not reviewed by Recallfolio
RATTLE NOISE FROM LOWER A-PILLAR. A rattle noise is present from the lower area of the A-Pillar. Due to a manufacturing error, the bolt securing the front door brake/stop to the A-Pillar may have loosened over time.
NHTSA source summary · Original PDF not reviewed by Recallfolio
DIAGNOSING NON FUNCTIONING eDRIVE. * Vehicle will not go into "eDrive" * No pertinent electric drivetrain fault codes to assist with diagnosis * "eDrive" may be greyed-out in the Central Information Display (CID) and is not selectable * MSA deactivation * 12 volt battery failure * Intelligent Battery Sensor (IBS) failure.
NHTSA source summary · Original PDF not reviewed by Recallfolio
NOISE FROM ENGINE WHEN STARTING. Noise when starting the engine. Engine making a rattling/grinding noise near the 12 volt starter motor. The following fault has been stored in the DME fault memory: * 21A511 - Start system, pinion starter motor: Timeout The following faults are also possible: * 21A504 - EGS, separation clutch: jammed open * 21A50A - Start system, pinion starter: Timeout successively occurred multiple times * 21A510 - Start system, EME: Timeout Consequential damage to flywheel (Torsional vibration damper) and automatic transmission may have also occurred. The starter motor is broken. It may be indicated by:
Source components: ELECTRICAL SYSTEM · ENGINE AND ENGINE COOLING.
NHTSA source summary · Original PDF not reviewed by Recallfolio
For the above-referenced vehicles with driver?s side airbag modules, BMW of North America, LLC (?BMW NA?) will provide a Customer Support Program as outlined in the Takata Settlement Customer Support Program Overview attachment. This ?component-specific? customer support program applies only if there is a defect in materials or workmanship of the Takata driver?s side airbag module in a listed vehicle.
NHTSA source summary · Original PDF not reviewed by Recallfolio
STATIONARY CLIMATE CONTROL NOT WORKING AFTER HIGH VOLTAGE CHARGING. After the high voltage (HV) charging procedure, the stationary climate control (aka preconditioning) does not work. This is part of the normal design. There is no fault or defect.
Source components: ELECTRICAL SYSTEM · VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM.
NHTSA source summary · Original PDF not reviewed by Recallfolio
RAIN/LIGHT SENSOR (RLS): OIL LEAKAGE FROM GEL PAD. ??Oil leaking from the Rain/Light Sensor (RLS). Note: This oil serves as a separation medium between the RLS mounting gel pad and the windscreen. The oil ensures damage free disassembly in case of repair. CAUSE The oil that serves as the separation medium of the Rain/Light Sensor (RLS) gel pad and the windscreen leaks out. Expose the Rain/Light Sensor (RLS) and properly clean the area of all oily residue. Note: The separating oil usually leaks only once from the pad at the RLS. Due to the small oil quantity in the gel pad, additional oil leakage is not plausible. Leaking oil does not impair the function of the RLS.
NHTSA source summary · Original PDF not reviewed by Recallfolio
SERVICE ACTION. REWORK THE STEERING GEAR. Screws attaching the power pack to the steering gear may be broken. Broken screws result in noises during steering motions and variable steering assistance. Check Control Message (CCM) may be displayed.
NHTSA source summary · Original PDF not reviewed by Recallfolio
?RETRACTABLE HARDTOP STATUS REQUEST SUPPLEMENT. INFORMATION Documents have been developed showing the known correct statuses for all hall sensors and micro switches used to operate the retractable hard top (RHT). This document is intended to act as a supplement to the diagnostic information available in ISTA. Comparing these statuses to the actual statuses of a vehicle with a functional problem may assist in narrowing down which sensor/switch is contributing to the functional problem. For E93, the status request may be found by connecting the car to ISTA and selecting: Control module functions/CTM Convertible top module/Diagnosis Requests ?Sensors/Switches For F33/F83, the statuses should be checked using the applicable test plan as instructed in attachment B54 09 07 F33 F83 RHT Status.pdf. For I15, the statuses should be checked using the applicable test plan as instructed in attachment B54 09 07 I15 Top Status.pd
Source components: ELECTRICAL SYSTEM · EQUIPMENT · STRUCTURE:BODY.
NHTSA source summary · Original PDF not reviewed by Recallfolio
?BMW ONLINE NON-FUNCTIONAL: CHECK ICC-ID IN ACCOUNT. BMW Online/BMW ConnectedDrive not functional. Vehicle and service cockpit have different ICC-ID's (Integrated Circuit Card Identifier).
NHTSA source summary · Original PDF not reviewed by Recallfolio
?CONNECTEDDRIVE/BMW ASSIST SYSTEM DIAGNOSIS INFORMATION. ConnectedDrive/BMW Assist features are partially or completely inoperative. This Service Information bulletin is being published because vehicles are down for an extended period of time when researching system failures with ConnectedDrive or BMW Assist. This Service Information bulletin will assist you both in identifying the issue and providing technical support. CAUSE Not enough information is available for BMW NA engineers to assist the technician in diagnosing the root cause.
NHTSA source summary · Original PDF not reviewed by Recallfolio
?GROANING NOISE FROM DOORS. A groaning noise is heard from any of the doors when driving over rough road surfaces. Excessive friction between window guide and door opening. Situation is worsened by: * Option SA 760 high-gloss shadow line * High ambient temperature * Uneven driving surface.
NHTSA source summary · Original PDF not reviewed by Recallfolio
Butt connector for repairing a plug connection. The ?top up coolant? message is displayed in the central display (CC message ID 166). When checking the cooling system there are no leaks found and the expansion tank is filled to the proper level.
NHTSA source summary · Original PDF not reviewed by Recallfolio
AFTER EXCHANGING THE FRONT ELECTRONIC MODULE (FEM), PROGRAMMING / ENCODING IS NOT POSSIBLE: After replacing the Front Electronic Module (FEM) for an applicable repair, programming / encoding is not possible.
NHTSA source summary · Original PDF not reviewed by Recallfolio
BUZZING NOISE FROM VALVETRONIC MOTOR BEFORE OR AFTER ENGINE OPERATION: Buzzing noise may be heard from the Valvetronic motor when the vehicle is unlocked, before the engine is started, or after the engine is turned off.
Source components: ENGINE · ENGINE AND ENGINE COOLING.
NHTSA source summary · Original PDF not reviewed by Recallfolio
NAVIGATION SYSTEM: REPORTING MISSING OR INCORRECT ROAD MAP DATA: The route guidance is inaccurate and therefore irritating to the customer; or it is not possible to locate certain addresses, for instance:
NHTSA source summary · Original PDF not reviewed by Recallfolio
NAVIGATION PRO (NBT EVO) MAP UPDATE NOT POSSIBLE, NAVIGATION DOES NOT START: Navigation system will not start at all or the: ÒNavigation system startsÓ message is permanently displayed; or
NHTSA source summary · Original PDF not reviewed by Recallfolio
NAVIGATION SYSTEM: REPORTING MISSING OR INCORRECT ROAD MAP DATA: The route guidance is inaccurate and therefore irritating to the customer; or it is not possible to locate certain addresses, for instance:
NHTSA source summary · Original PDF not reviewed by Recallfolio
INSTRUMENT CLUSTER OUTSIDE TEMPERATURE DISPLAY IMPLAUSIBLE: In the Instrument Cluster (Kombi) display you may observe an implausible outside temperature reading.
NHTSA source summary · Original PDF not reviewed by Recallfolio
HEADLIGHT ASSEMBLIES HAVE VISIBLE INTERNAL MOISTURE/CONDENSATION: Water on the inside (A) or misting (B) of both headlight lenses that is visible from outside.
NHTSA source summary · Original PDF not reviewed by Recallfolio
CONNECTEDDRIVE-REMOTE SERVICES DO NOT FUNCTION: Remote Services (such as locking and unlocking the car, vehicle location by honking the horn, flashing the lights or on the map in the BMW Connected App) do not function after vehicle has been sitting for extended amount of time (In excess of 20 hours).
NHTSA source summary · Original PDF not reviewed by Recallfolio
CONTACTLESS TAILGATE (SMART OPENER) IS TOO SENSITIVE: When the remote is located in the range of the Smart Opener operation may be the contactless tailgate (Smart Opener) opens / close unintentionally from objects in the vicinity of the rear of the vehicle; for example by a gas filling hose.
NHTSA source summary · Original PDF not reviewed by Recallfolio
DELIVERY STOP REWORK TAIL LIGHTS. The tail light mounting brackets may be cracked or broken. During assembly; oil may have contaminated the plastic housing of the rear tail lamps; causing damage to the mounting points of the tail light assembly.
NHTSA source summary · Original PDF not reviewed by Recallfolio
GROANING NOISE FROM DOORS. Part Number Description Quantity F30; F31; F80 Front 51 33 7 414 531 Window guide; front left As needed 51 33 7 414 532 Window guide; front right As needed F30; F80 Rear A groaning noise is heard from any of the doors when driving over rough road surfaces.
NHTSA source summary · Original PDF not reviewed by Recallfolio
N20 AND N26 ENGINES TURBOCHARGER ELECTRIC WASTEGATE ACTUATOR LINKAGE PIN CORROSION This Service Information bulletin replaces SI B11 14 17 dated February 2018.
NHTSA source summary · Original PDF not reviewed by Recallfolio
ENGINE VIBRATIONS OR NOISE. One of the following complaints may be reported The engine runs erratically; The engine causes vibrations when running; Grinding noise from the engine compartment when engine is running.
NHTSA source summary · Original PDF not reviewed by Recallfolio
CHECK CONTROL MESSAGE (CCM): ASSISTANCE SYSTEM RESTRICTED AFTER DELETING TRANSPORT MODE: The CCM assistance systems restricted or pedestrian protection system failed is displayed after deleting transport mode.
Source components: STEERING:ELECTRIC POWER ASSIST SYSTEM.
NHTSA source summary · Original PDF not reviewed by Recallfolio
BMW APPS RANDOMLY STARTS PLAYING ON ITS OWN: While listening to FM, or AM, or Satellite Radio (SDARs), the audio source randomly switches to BMW Apps (Pandora, Spotify, Audible etc.) with no input from driver or passenger.
NHTSA source summary · Original PDF not reviewed by Recallfolio
CONTACTLESS TAILGATE (SMART OPENER) IS TOO SENSITIVE: When the remote is located in the range of the Smart Opener operation may be the contactless tailgate (Smart Opener) opens / close unintentionally from objects in the vicinity of the rear of the vehicle; for example by a gas filling hose.
NHTSA source summary · Original PDF not reviewed by Recallfolio
VOLUNTARY EMISSIONS RECALL CAMPAIGN 16E-A05 - N26: Carbonization of the turbocharger sealing ring can cause the exhaust to smoke briefly during cold start up.
NHTSA source summary · Original PDF not reviewed by Recallfolio
Engine Oil Quick Reference Chart and Drain Plug Torque: The current version of ISTA/D has an error in the engine oil capacity specification for all vehicles with the N63R engine and xDrive.
NHTSA source summary · Original PDF not reviewed by Recallfolio
ENGINE CAMSHAFT (VANOS) ADJUSTMENT UNITS: BMW of North America, LLC (ÒBMW NAÓ) is extending the limited warranty for the Camshaft (VANOS) Adjustment Units on certain model BMW vehicles equipped with the non-turbocharged 6-cylinder engine
NHTSA source summary · Original PDF not reviewed by Recallfolio
NO AUDIO PLAYBACK AFTER REPLACING THE HEAD UNIT HIGH 2 (HU-H2): After replacing the Head Unit High (HU-H2) and performing ISTA4 programming, there is no audio playback.
NHTSA source summary · Original PDF not reviewed by Recallfolio
KLE CHARGING FAULT 21E6E9: During the ISTA short test diagnosis, fault code 21E6E9 Ð ÒCharging electronics: Charging mode interruptedÓ is found stored in the KLE (Convenience Charging Electronics) module.
NHTSA source summary · Original PDF not reviewed by Recallfolio
"AIRBAG WARNING LIGHT: ACSM FC 930A60 OR 930A1C SEAT OCCUPANCY DETECTION. According to the customer, the airbag warning light was on, but it may not be on when the vehicle arrives in the workshop. 1. ACSM fault code ""930A60 - Seat occupancy detection, front passenger; malfunction"" is stored. The fault may or may not currently be present. Or 2. ACSM fault code ""930A1C - Front passenger seat occupancy detection transmitting fault (moisture)"" is stored. The fault may or may not currently be present. The front passenger seat occupancy mat consists of a seat occupancy mat with a capacitive sensor system. This means a front passenger is detected by measuring the resistance of the human body. The fault is set when moisture is detected on the mat itself."
NHTSA source summary · Original PDF not reviewed by Recallfolio
"BATTERY DISCHARGE CCM (CHECK CONTROL MESSAGE) DISPLAYED: COMFORT ACCESS DISABLED. One or more of the following conditions are present: * CCM ""Battery. Discharge in standstill."", or similar, is displayed. * Comfort Access and contactless tailgate opening are not working. * Vehicle can still be unlocked with radio remote control (ID transmitter). Fault conditions are cleared upon engine restart. FEM (Front Electronics Module) software error Unauthorized (radio remote control out of range) access to vehicle has been attempted at least seven times with Comfort Access or Smart Opener (contactless tailgate opening) when the vehicle was locked. As a result of these unauthorized access attempts, the following conditions were set: * CCM ""Battery. Discharge in standstill."", or similar, is displayed * Terminal 30F (switched battery terminal when fault occurs) was deactivated, preventing Comfort Access and contactless tailgate opening."
NHTSA source summary · Original PDF not reviewed by Recallfolio
CREAKING NOISE FROM TAILGATE LOCK.. During opening and closing of the tailgate, a creaking noise can be heard from the tailgate lock. Excess friction caused by dust/dirt entry into the tailgate lock and on the striker.
NHTSA source summary · Original PDF not reviewed by Recallfolio
ERRONEOUS SERVICE INCLUSIVE CBS DISPLAY. After pre-delivery check or after instrument cluster exchange, BMW Service Inclusive is displayed although the vehicle does not feature the optional Service Inclusive coverage. Instrument Cluster display error
NHTSA source summary · Original PDF not reviewed by Recallfolio
Shipping specific non-deployed vehicle safety devices to lighting resources, llc. This service Information bulletin provides information on shipping "specific" noin-deployed vehicle safety devices that are classified as Dangerous Goods (DG) to Lighting resources, LLC
NHTSA source summary · Original PDF not reviewed by Recallfolio
ConnectedDrive/BMW Assist System Diagnosis Information This Service Information bulletin replaces SI B84 02 14 dated July 2014 What's New: Model - Removed models which no longer support BMW Assist functionality and added new models. Procedure - Add step requesting print out of ConnectedDrive Service Cockpit page Information - Add SI for ConnectedDrive Service Cockpit; updated the hyperlinks and email address for CD support team; deleted scenario for old CDMA unit which are no longer supported. ConnectedDrive/BMW Assist features are partially or completely inoperative. This Service Information bulletin is being published because vehicles are down for an extended period of time when researching system failures with ConnectedDrive or BMW Assist. This Service Information bulletin will assist you both in identifying the issue and providing technical support. CAUSE Not enough information is available for BMW NA engineers to assist the technician in diagnosing the root cause.
NHTSA source summary · Original PDF not reviewed by Recallfolio
A/C Cooling: Intermittent Reduction of Air Flow What is new The date in repair procedure and warranty section has been changed for vehicles produced to September 30, 2013 and from October 1, 2013.. Customer may complain of reduced air flow when the air conditioning system is operated for an extended time, usually longer than 30 minutes. INFORMATION Possibility of reproducing this situation is improved by the following conditions: High outside ambient temperature High humidity Note: It is very difficult to duplicate this issue. The fault may be reproduced under the following conditions: Air-conditioning system switched on Driving Experience switch NOT set to Eco Pro Slower fan speeds Temperature setting below 68F (20C) Trip duration at least 30 minutes Outside temperature above 68F (20C) NOTE: After parking the vehicle or switching off the air-conditioning system for at least 20 minutes, the symptom disappears (ice melts off evaporator and puddles under the car from the A/C drains). Evaporator starts to freeze up due to the position of the evaporator temperature sensor.
NHTSA source summary · Original PDF not reviewed by Recallfolio
"SME FAULT CODE 21F04B. One or several of the following check control messages (CCM) may be displayed: ""Engine fault! Power loss"" (CCM-ID: 29) ""Powertrain malfunction!"" (CCM-ID: 633) ""Hybrid system malfunctioning!"" (CCM-ID: 585) Note: The fault code 21F04B stated below may also be entered without any of the above mentioned CC messages being displayed A timing problem between the SME and the cell supervision circuit (CSC)."
NHTSA source summary · Original PDF not reviewed by Recallfolio
GROANING NOISE FROM DOORS This Service Information bulletin replaces SI B51 10 16 dated March 2016 What's New: Added production locations/dates Clarified Cause Moved Procedure to attachment. Added Tape, Anti-static cleaner and lubricant. A groaning noise is heard from any of the doors when driving over rough road surfaces. Excessive friction between window guide and door opening. Situation is worsened by: Option SA 760 high-gloss shadow line High ambient temperature Uneven driving surface
NHTSA source summary · Original PDF not reviewed by Recallfolio
Howling Noise from the Rear Differential. When coasting from 85 - 70 mph, there is a howling noise from the rear differential. CAUSE Resonance behavior during the running-in phase of the PHEV rear differential.
Source components: POWER TRAIN:DRIVELINE:DIFFERENTIAL UNIT.
NHTSA source summary · Original PDF not reviewed by Recallfolio
Charging of the high voltage battery is interrupted and will not complete. A change in the job structure in ISTA causes the BDC to open the 30B relay unexpectedly.
NHTSA source summary · Original PDF not reviewed by Recallfolio
SME - HV BATTERY CELL MODULE VOLTAGE FAULTS. When diagnosing with ISTA or ISTA Next, a fault code (detailed below), regarding the cell voltage measurement, is entered in the battery management electronics (SME). ? 21F0C2 - High-voltage battery, cell supervision circuit 1: Voltage measurement (battery cell), line disconnection ? 21F0C3 - High-voltage battery, cell supervision circuit 2: Voltage measurement (battery cell), line disconnection ? 21F0C4 - High-voltage battery, cell supervision circuit 3: Voltage measurement (battery cell), line disconnection ? 21F0C5 - High-voltage battery, cell supervision circuit 4: Voltage measurement (battery cell), line disconnection ? 21F0C6 - High-voltage battery, cell supervision circuit 5: Voltage measurement (battery cell), line disconnection The customer might not have reported the situation as the fault code could have no effect on the vehicle operation. Erroneous fault in the fault memory of the SME, possible fault in a cell supervision circuit (CSC) or a cell module.