- Fault codes
- 153
- Block
- B12
- Make group
- Mercedes-Benz · Smart
- Source language
- English
The 153 Mercedes-Benz · Smart fault codes that start with B12, with descriptions.
| Code | Description |
|---|---|
B1200 | B38/2 (Rain/Light Sensor) : Communication Fault Circuit Open; CAN Bus OFF |
B1201 | Electric seat adjustment front left: Hall sensor front height M27m3; Electric seat adjustment front left: Hall sensor front height |
B1202 | B14 (Ambient Temperature Display Temperature Sensor) Circuit Open; Check Refrigerant Level |
B1203 | Communication Between Control Unit Rain/Light Sensor and Component OCP Is Circuit Fault |
B1204 | Component A6m2 (Combustion Air Blower): Burner Motor"s Antilock Device Is Activated; Component M16/22 (Air Distribution Actuator Motor) Has a Short Circuit to Ground or an / Open |
B1205 | The Blower Motor Is Sluggish |
B1206 | Component A6r4 (Flame Monitor Glowpin Unit) Has Circuit Short to Ground; Component A32/2r2 (Blend Air Flap Potentiometer) Has a Short Circuit to Ground or an / Open |
B1207 | Component A6r4 (Flame Monitor Glowpin Unit) Has Short Circuit to Positive |
B1208 | A32n1 (Blower Regulator); Component "Y16 (Stationary Heater Switchover Valve)" Has a Circuit Short to Ground |
B1209 | Hall Sensor of Component M18/25 (Left Rear Lower Leg Rest Fore/Aft Adjustment Motor) Is Circuit Fault |
B120A | A31/1m1 (Circulation Pump) : Overload ( Overload Is Detected at a Current > 2 A. ); E6/5 (Left Exterior Mirror Turn Signal Lamp) : Short Circuit |
B120B | E6/5 (Left Exterior Mirror Turn Signal Lamp) Circuit Open; There Is a Discontinuity in the Line to Component E6/5 (Left Exterior Mirror Turn Signal Lamp) or the Component Is Circuit Fault |
B120C | E17/3 (Left Door Entrance/Exit Lamp) Circuit Open |
B120D | E17/20 (Left Rear Door Warning Light) : Short Circuit; M21/1h1 (Automatic Dimming Mirror) : Short Circuit |
B120E | E17/13 (Left Rear Door Inside Handle Illumination) : Short Circuit; Kurzschluss Am Eingang Privaliteschalter |
B120F | This Circuit Fault |
B1210 | A1 (Instrument Cluster) - Warning Light SRS Is Circuit Fault; Check Component A69/1 (Left Front Tire Pressure Monitor Sensor) |
B1211 | A1 (Instrument Cluster) - Warning Light ABS Is Circuit Fault; Ereignis: Unterspannung (Lokal < 8 Voltage) |
B1212 | A1 (Instrument Cluster) - Warning Light Traction Control Is Circuit Fault; Component "A6r5 (Stationary Heater Fuel Preheating System Heating Element)" Has a Circuit Short to Ground |
B1213 | If seat memory installed: ext left rearview mirror voltage faulty |
B1214 | If seat memory installed: ext right rearview mirror voltage faulty |
B1215 | A1 (Instrument Cluster) - Warning Light Seat Belt Reminder Warning Is Circuit Fault; R12/3 (Driver Airbag Squib) - Plausibility Circuit Fault |
B1216 | A1 (Instrument Cluster) - Warning Light RDK Tire Pressure Control Is Circuit Fault; On-board Electrical System Undervoltage During Residual Heat or Stationary Heater Operation |
B1217 | A1 (Instrument Cluster) - Warning Light Brake Is Circuit Fault; Regensensor SGfehler Scheibenadaption |
B1218 | A1 (Instrument Cluster) - Loudspeaker Circuit Fault |
B1219 | A1 (Instrument Cluster) Circuit Fault; N22b1 (In-car Temperature Sensor) |
B1220 | Check Component A69/2 (Right Front Tire Pressure Monitor Sensor); K18/4 (Left Front Seat Belt Convenience Feature Solenoid) |
B1221 | Fault in Communication Between Component A2/110 (Front RDK Decoder Antenna) and Component N88/1 (TPM [RDK] Control Unit); Interior CAN Bus - No CAN Message From Control Unit Engine |
B1222 | A1 (Instrument Cluster) - Warning Light ESP Is Circuit Fault; K18/7 (Right Rear Seat Belt Convenience Feature Solenoid) - Short Circuit or Overload |
B1223 | B10/4 (In-car Temperature Sensor) - Pin 15 at Connector a : Short Circuit to Positive; Component S68/3 (Driver-side Seat Belt Buckle Restraint Systems Switch) Returns an Unknown Status |
B1224 | R12/4 (Front Passenger Airbag Squib) - Test Plug Connection Passenger Airbag; R12/4 (Front Passenger Airbag Squib) - the Electrical Lines Are Swapped |
B1225 | Control Unit N2/7 (Restraint Systems Control Unit) Is Circuit Fault; Engine CAN Bus - No CAN Message From Control Unit Electric Suction Fan |
B1226 | In-car temperature sensor (B10/4) |
B1227 | Outside temperature indicator temp sensor (014) |
B1228 | B10/2 (Left Heat Exchanger Temperature Sensor); Heating Element of Right Head Area Ventilation Circuit Fault |
B1229 | Heater core temperature (B10/1) |
B122A | Fan of Right Head Area Ventilation Circuit Fault |
B122F | Fault in Component A74 (Steering Wheel Heater Electronics) |
B1230 | Evaporator temperature sensor (B10/6) |
B1231 | ECT sensor (B11/4) |
B1232 | Refrigerant pressure sensor (B12) |
B1233 | Refrigerant temperature sensor (B12/1) |
B1234 | Sun sensor (B32) |
B1235 | Emissions sensor (B31) |
B1236 | B10/9 (Left Rear Air Conditioning Heat Exchanger Temperature Sensor) |
B1237 | B10/10 (Right Rear Air Conditioning Heat Exchanger Temperature Sensor) |
B1238 | Temperature Thumbwheel Left Rear |
B1239 | Temperature Thumbwheel Right Rear |
B1240 | B10/11 (Rear Air Conditioning Evaporator Temperature Sensor); Check Component A69/4 (Rear Right Tire Pressure Control Wheel Sensor) |
B1241 | Refrigerant Fill |
B1242 | A9 (AC Compressor); Antenna Not or Not Correctly Connected . This Circuit Fault |
B1243 | B10/4 (In-car Temperature Sensor) - Pin 16 at Connector a : Short Circuit to Positive; Component S68/15 (Front Passenger Airbag Cutout Switch) Returns an Unknown Status |
B1244 | R12/1 (Driver ETR [GUS] Squib) - Test Plug Connection R12/1 (Driver ETR [GUS] Squib); R12/1 (Driver ETR [GUS] Squib) - the Electrical Lines Are Swapped |
B1245 | Control Unit N2/7 (Restraint Systems Control Unit) Is Circuit Fault; R12/1 (Driver ETR [GUS] Squib) - Plausibility Circuit Fault |
B1246 | PTS Parktronic: A42b1 (left outer sensor, front bumper) The plug; PTS Parktronic: A42b1 (left outer sensor, front bumper) The plug connection has poor contact or is loose, or the sensor or cable is faulty |
B1247 | A42b2 (Left Center Sensor, Front Bumper); A42b2 (Left Center Sensor, Front Bumper): the Plug Connection Has Poor Contact or Is Loose, or the Sensor or Cable Is Circuit Fault |
B1248 | A42b3 (Left Inner Sensor, Front Bumper); A42b3 (Left Inner Sensor, Front Bumper): the Plug Connection Has Poor Contact or Is Loose, or the Sensor or Cable Is Circuit Fault |
B1249 | A42b4 (Right Inner Sensor, Front Bumper); A42b4 (Right Inner Sensor, Front Bumper): the Plug Connection Has Poor Contact or Is Loose, or the Sensor or Cable Is Circuit Fault |
B1250 | A42b5 (Right Center Sensor, Front Bumper); A42b5 (Right Center Sensor, Front Bumper): the Plug Connection Has Poor Contact or Is Loose, or the Sensor or Cable Is Circuit Fault |
B1251 | A42b6 (Right Outer Sensor, Front Bumper); A42b6 (Right Outer Sensor, Front Bumper): the Plug Connection Has Poor Contact or Is Loose, or the Sensor or Cable Is Circuit Fault |
B1252 | A43b7 (Right Outer Sensor, Rear Bumper); A43b7 (Right Outer Sensor, Rear Bumper): the Plug Connection Has Poor Contact or Is Loose, or the Sensor or Cable Is Circuit Fault |
B1253 | A43b8 (Right Inner Sensor, Rear Bumper); A43b8 (Right Inner Sensor, Rear Bumper): the Plug Connection Has Poor Contact or Is Loose, or the Sensor or Cable Is Circuit Fault |
B1254 | A43b9 (Left Inner Sensor, Rear Bumper); A43b9 (Left Inner Sensor, Rear Bumper): the Plug Connection Has Poor Contact or Is Loose, or the Sensor or Cable Is Circuit Fault |
B1255 | A43b10 (Left Outer Sensor, Rear Bumper); A43b10 (Left Outer Sensor, Rear Bumper): the Plug Connection Has Poor Contact or Is Loose, or the Sensor or Cable Is Circuit Fault |
B1256 | A44/4 (PTS Warning Display, Instrument Panel Center); B10/6 (Evaporator Temperature Sensor) , Evaporator Front |
B1257 | A44/4 (PTS Warning Display, Instrument Panel Center); Not Relevant! |
B1258 | A44/3 (Rear PTS Warning Display) |
B1259 | A44/3 (Rear PTS Warning Display); B38/2 (Rain/Light Sensor) |
B125A | Sitzverstellrelais Schluss Nach Ubat |
B1260 | Check All Wheel Sensors; Component A52 (Headlamp Range Adjustment Front Axle Sensor) Has T |
B1261 | Component A51 (Headlamp Range Adjustment Rear Axle Sensor) Has T; Massage Function Actuation Is Circuit Fault |
B1262 | Component A52 (Headlamp Range Adjustment Front Axle Sensor) Has S; Not Relevant! |
B1263 | Component A51 (Headlamp Range Adjustment Rear Axle Sensor) Has S; Short Circuit to Positive of 5 V Supply Voltage for Sensors |
B1264 | Component A52 (Headlamp Range Adjustment Front Axle Sensor) Has T or Q; Not Relevant! |
B1265 | Component A51 (Headlamp Range Adjustment Rear Axle Sensor) Has T or Q; Control Unit N2/7 (Restraint Systems Control Unit) Is Circuit Fault |
B1266 | Component A52 (Headlamp Range Adjustment Front Axle Sensor) Has an Signal Implausible; Control Unit N2/7 (Restraint Systems Control Unit) Is Circuit Fault |
B1267 | Communication Circuit Fault; Component A51 (Headlamp Range Adjustment Rear Axle Sensor) Has an Signal Implausible |
B1268 | Communication Circuit Fault; Component A52 (Headlamp Range Adjustment Front Axle Sensor) Has S |
B1269 | Communication Error of AC Bus with Component B31/1 (AAC Multifunction Sensor); Component A51 (Headlamp Range Adjustment Rear Axle Sensor) Has S |
B1270 | Communication Error of AC Bus with Component B32/2 (AAC Sun Sensor (4 in Total)); Control Unit N88 (TPM [RDK] Control Unit) Was Disconnected From Tml. 30 |
B1271 | Communication Circuit Fault; The Coding for Component R12/18 (Center 2nd Row ETR [GUS] Squib) Is Circuit Fault |
B1272 | B31/2 (Air Humidity Sensor); The Coding for Component R12/18 (Center 2nd Row ETR [GUS] Squib) Is Circuit Fault |
B1273 | Communication Error of AC Bus with Component A32n1 (Blower Regulator); The Coding for Component R12/18 (Center 2nd Row ETR [GUS] Squib) Is Circuit Fault |
B1274 | AC Bus : Supply Voltage Has Circuit Short to Ground; The Coding for Component R12/18 (Center 2nd Row ETR [GUS] Squib) Is Circuit Fault |
B1275 | The Coding for the Ignition Circuit with Component R12/18 (Center 2nd Row ETR [GUS] Squib) Is / Fault |
B1276 | Component A26/14 (Interior Motion Protection Transmitter and Receiver Unit) Is Circuit Fault |
B1277 | Component A26/14 (Interior Motion Protection Transmitter and Receiver Unit) Is Faulty or the Lead Has Circuit Open |
B1278 | Component B39 (Left Rear Glass Breakage Sensor) Is Faulty or the Lead Has Circuit Open |
B1279 | Component B39/1 (Right Rear Glass Breakage Sensor) Is Faulty or the Lead Has Circuit Open |
B1280 | General Equipment Circuit Fault; System 'Parktronic' Has Detected a Circuit Fault |
B1281 | Test Plug Connection 1; The Ignition Circuit with Component R12/12 (Right Rear Side Airbag Ignition Squib) Has Short Circuit to Positive |
B1282 | Test Plug Connection 1; The Ignition Circuit with Component R12/7 (Right 2nd Row ETR [GUS] Squib) Has Short Circuit to Positive |
B1283 | Test Plug Connection 1; The Ignition Circuit with Component R12/7 (Right Rear ETR Ignition Squib) Has / Short to Ground |
B1284 | Test Plug Connection 1; The Coding for the Ignition Circuit with Component R12/12 (Right Rear Side Airbag Ignition Squib) Is / Fault |
B1285 | Control Unit N2/7 (Restraint Systems Control Unit) Is Circuit Fault |
B1286 | Control Unit N2/7 (Restraint Systems Control Unit) Is Circuit Fault; Hall Sensor of Component M18/2m1 (Rear Seat Adjustment Forward/Back Motor) Is Circuit Fault |
B1287 | Hall Sensor of Component M18/1m2 (Rear Seat Cushion Inclination Raise/Lower Motor) Is Circuit Fault; The Ignition Circuit Containing Component R12/12 (Right Rear Side Airbag Ignition Squib) Is Short-circuited with Another Ignition Circuit |
B1288 | Hall Sensor of Component M18/2m2 (Rear Seat Cushion Inclination Raise/Lower Motor) Is Circuit Fault |
B1289 | Switch S103s2 (Side Cheeks Adjustment Switch) Does Not Circuit Open |
B1290 | R12/32 (Driver Thoraxbag Squib) - Resistance Too Large; Switch S104s1 (Dynamic Lumbar Support Adjustment Switch) or S104s3 (Lumbar Support Adjustment Switch) Does Not Circuit Open |
B1291 | R12/32 (Driver Thoraxbag Squib) - Resistance Too Small; Switch S103s1 (Dynamic Lumbar Support Adjustment Switch) or S103s3 (Lumbar Support Adjustment Switch) Does Not Circuit Open |
B1292 | R12/32 (Driver Thoraxbag Squib) - Short Circuit to Positive; Switch S104s2 (Side Cheeks Adjustment Switch) Does Not Circuit Open |
B1293 | Line Between Component N82/1 (Vehicle Power Supply Control Module) and Component N73 (EIS [EZS] Control Unit); R12/32 (Driver Thoraxbag Squib) Circuit Short to Ground |
B1294 | R12/32 (Driver Thoraxbag Squib) - Test Plug Connections R12/32 (Driver Thoraxbag Squib) and X28/29 (Driver Thoraxbag Squib Connector) |
B1295 | Component B3 (Driver Seat Adjustment Detection Sensor) Has a Short Circuit; R12/32 (Driver Thoraxbag Squib) - Plausibility Circuit Fault |
B1296 | Coding of Control Module N2/7 (Restraint Systems Control Unit) Is Circuit Fault |
B1297 | Coding of Control Module N2/7 (Restraint Systems Control Unit) Is Circuit Fault; The Signal From the Switch 'Seat Adjustment' to Control Module DCM-L Are Circuit Fault |
B1298 | Coding of Control Module N2/7 (Restraint Systems Control Unit) Is Circuit Fault; Refrigerant Level Is Too Low. , Evaporator Rear |
B1299 | Coding of Control Module N2/7 (Restraint Systems Control Unit) Is Circuit Fault; The Signals of the Input Switches to Control Module DCM-L Are Circuit Fault |
B129A | Coding of Control Module N2/7 (Restraint Systems Control Unit) Is Circuit Fault |
B129B | Coding of Control Module N2/7 (Restraint Systems Control Unit) Is Circuit Fault |
B12A0 | R12/33 (Passenger Thoraxbag Squib) - Resistance Too Large; The Ignition Circuit with Component R12/22 (Left Rear Window Airbag Ignition Squib) Has / Short to Ground |
B12A1 | R12/33 (Passenger Thoraxbag Squib) - Resistance Too Small; The Ignition Circuit with Component R12/22 (Left Rear Window Airbag Ignition Squib) Has Short Circuit to Positive |
B12A2 | R12/33 (Passenger Thoraxbag Squib) - Short Circuit to Positive; The Ignition Circuit with Component R12/21 (Right Front Side Airbag Ignition Squib) Has Short Circuit to Positive |
B12A3 | R12/33 (Passenger Thoraxbag Squib) Circuit Short to Ground; The Ignition Circuit with Component R12/21 (Right Front Side Airbag Ignition Squib) Has / Short to Ground |
B12A4 | R12/33 (Passenger Thoraxbag Squib) - Test Plug Connections R12/33 (Passenger Thoraxbag Squib) and X28/30 (Front Passenger Thoraxbag Squib Connector); The Coding for the Ignition Circuit with Component R12/22 (Left Rear Window Airbag Ignition Squib) Is / Fault |
B12A5 | Control Unit N2/7 (Restraint Systems Control Unit) Is Circuit Fault; R12/33 (Passenger Thoraxbag Squib) - Plausibility Circuit Fault |
B12A6 | Control Unit N2/7 (Restraint Systems Control Unit) Is Circuit Fault |
B12A7 | The Ignition Circuit Containing Component R12/22 (Left Rear Window Airbag Ignition Squib) Is Short-circuited with Another Ignition Circuit |
B12B0 | The Resistance Value in the Ignition Circuit Containing Component R12/11 (Left Rear Side Airbag Ignition Squib) Is Voltage Too High |
B12B1 | The Resistance Value in the Ignition Circuit Containing Component R12/11 (Left Rear Side Airbag Ignition Squib) Is Voltage Too Low |
B12B2 | The Ignition Circuit with Component R12/11 (Left Rear Side Airbag Ignition Squib) Has Short Circuit to Positive |
B12B3 | The Ignition Circuit with Component R12/11 (Left Rear Side Airbag Ignition Squib) Has / Short to Ground |
B12B4 | The Ignition Circuit Containing Component R12/11 (Left Rear Side Airbag Ignition Squib) Is Short-circuited with Another Ignition Circuit |
B12B5 | The Coding for the Ignition Circuit with Component R12/11 (Left Rear Side Airbag Ignition Squib) Is / Fault |
B12C0 | The Ignition Circuit with Component R12/23 (Right Rear Window Airbag Ignition Squib) Has / Short to Ground; The Resistance Value in the Ignition Circuit Containing Component R12/12 (Right Rear Side Airbag Ignition Squib) Is Voltage Too High |
B12C1 | The Ignition Circuit with Component R12/23 (Right Rear Window Airbag Ignition Squib) Has Short Circuit to Positive; The Resistance Value in the Ignition Circuit Containing Component R12/12 (Right Rear Side Airbag Ignition Squib) Is Voltage Too Low |
B12C2 | The Ignition Circuit with Component R12/12 (Right Rear Side Airbag Ignition Squib) Has Short Circuit to Positive; The Resistance Value in the Ignition Circuit Containing Component R12/23 (Right Rear Window Airbag Ignition Squib) Is Voltage Too Low |
B12C3 | The Ignition Circuit with Component R12/12 (Right Rear Side Airbag Ignition Squib) Has / Short to Ground; The Resistance Value in the Ignition Circuit Containing Component R12/23 (Right Rear Window Airbag Ignition Squib) Is Voltage Too High |
B12C4 | The Coding for the Ignition Circuit with Component R12/23 (Right Rear Window Airbag Ignition Squib) Is / Fault |
B12C5 | Control Unit N2/7 (Restraint Systems Control Unit) Is Circuit Fault; The Coding for the Ignition Circuit with Component R12/12 (Right Rear Side Airbag Ignition Squib) Is / Fault |
B12C6 | Control Unit N2/7 (Restraint Systems Control Unit) Is Circuit Fault |
B12C7 | The Ignition Circuit Containing Component R12/23 (Right Rear Window Airbag Ignition Squib) Is Short-circuited with Another Ignition Circuit |
B12D0 | R12/16 (Left Windowbag Squib) - Resistance Too Large; The Resistance Value in the Ignition Circuit Containing Component R12/22 (Left Rear Window Airbag Ignition Squib) Is Voltage Too High |
B12D1 | R12/16 (Left Windowbag Squib) - Resistance Too Small; The Resistance Value in the Ignition Circuit Containing Component R12/22 (Left Rear Window Airbag Ignition Squib) Is Voltage Too Low |
B12D2 | R12/16 (Left Windowbag Squib) - Short Circuit to Positive; The Ignition Circuit with Component R12/22 (Left Rear Window Airbag Ignition Squib) Has Short Circuit to Positive |
B12D3 | R12/16 (Left Windowbag Squib) Circuit Short to Ground; The Ignition Circuit with Component R12/22 (Left Rear Window Airbag Ignition Squib) Has / Short to Ground |
B12D4 | R12/16 (Left Windowbag Squib) - Test Plug Connection R12/16 (Left Windowbag Squib); The Ignition Circuit Containing Component R12/22 (Left Rear Window Airbag Ignition Squib) Is Short-circuited with Another Ignition Circuit |
B12D5 | R12/16 (Left Windowbag Squib) - Plausibility Circuit Fault; The Coding for the Ignition Circuit with Component R12/22 (Left Rear Window Airbag Ignition Squib) Is / Fault |
B12E0 | R12/17 (Right Windowbag Squib) - Resistance Too Large; The Coding for Component R12/25 (Driver Kneebag Ignition Squib) Is Circuit Fault |
B12E1 | R12/17 (Right Windowbag Squib) - Resistance Too Small; The Coding for Component R12/25 (Driver Kneebag Ignition Squib) Is Circuit Fault |
B12E2 | R12/17 (Right Windowbag Squib) - Short Circuit to Positive; The Coding for Component R12/25 (Driver Kneebag Ignition Squib) Is Circuit Fault |
B12E3 | R12/17 (Right Windowbag Squib) Circuit Short to Ground; The Coding for Component R12/25 (Driver Kneebag Ignition Squib) Is Circuit Fault |
B12E4 | R12/17 (Right Windowbag Squib) - Test Plug Connection R12/17 (Right Windowbag Squib); The Coding for Component R12/25 (Driver Kneebag Ignition Squib) Is Circuit Fault |
B12E5 | Control Unit N2/7 (Restraint Systems Control Unit) Is Circuit Fault; R12/17 (Right Windowbag Squib) - Plausibility Circuit Fault |
B12E6 | Control Unit N2/7 (Restraint Systems Control Unit) Is Circuit Fault |
B12E7 | The Coding for Component R12/25 (Driver Kneebag Ignition Squib) Is Circuit Fault |
B12F0 | Compressor Shut-off with Emergency-off Function; Duration of Refrigerant Compressor Emergency Cutoff Is Too Long |
B12F1 | Duration of Refrigerant Compressor Acceleration Cutoff Is Too Long; Engine Idle Speed Is Unstable >1min |
B12F2 | N10/1 (Signal Acquisition and Actuation Module (SAM) Driver Side) : A9 (AC Compressor); The Ignition Circuit with Component R12/25 (Driver Kneebag Ignition Squib) Has Short Circuit to Positive |
B12F3 | The Ignition Circuit with Component R12/25 (Driver Kneebag Ignition Squib) Has / Short to Ground |
B12F4 | The Ignition Circuit Containing Component R12/25 (Driver Kneebag Ignition Squib) Is Short-circuited with Another Ignition Circuit |
B12F5 | The Coding for the Ignition Circuit with Component R12/25 (Driver Kneebag Ignition Squib) Is / Fault |
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Code descriptions are shown in their source language; records without a translation stay raw. Source: CarCoding fault code database.
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