Results for “U121”
Fault codes 34
Results match keywords in the stored descriptions. Codes you typed are shown first.
| Code | Description | Brands | System |
|---|---|---|---|
| U1210 | Lost communication with automatic transmission electronic control unit | 16 | Network |
| U1211 | Engine parity/toggle bit error | 14 | Network |
| U1212 | CAN network | 15 | Network |
| U1213 | The information sent by the electronic stability program ECU is faulty. | 17 | Network |
| U1214 | Loss of serial communications for class 2 devices | 12 | Network |
| U1215 | Loss of serial communications for class 2 devices | 10 | Network |
| U1216 | CAN line (connection with suspension) | 11 | Network |
| U1217 | Invalid or missing data for external lamp outage | 16 | Network |
| U1218 | CAN BCM invalid value | 17 | Network |
| U1219 | Automatic release electronic parking brake failure | 9 | Network |
Show 15 more matches on this page
| Code | Description | Brands | System |
|---|---|---|---|
| U121A | Lost communication with Infotainment Head Unit (IHU) module | 2 | Network |
| U121B | Lost communication with Instrument Cluster Module | 2 | Network |
| U121C | Lost communication with TBOXS | 2 | Network |
| U121D | Lost communication with Passive Entry Passive Start | 8 | Network |
| U121E | Vehicle Control Unit (VCU) CAN 1 network segment lost communication with FCM | 9 | Network |
| U121F | Vehicle Control Unit (VCU) CAN 1 network segment lost communication with Automatic Parking Assist | 2 | Network |
| U121001 | SBC SPI Fehler - General Electric Failure | 1 | Network |
| U121082 | CAN communication: Battery Management System (BMS) counter error (1D9) | 1 | Network |
| U121101 | SBC SPOC Fehler - General Electric Failure | 1 | Network |
| U121183 | CAN communication: Motor Control Unit (MCU) checksum error (1E2) | 1 | Network |
| U121200 | Communication with the energy management CAN bus has a malfunction | 1 | Network |
| U121201 | HW Emergency Active - General Electric Failure | 1 | Network |
| U121282 | CAN communication: Motor Control Unit (MCU) counter error (1E2) | 1 | Network |
| U121383 | CAN communication: Motor Control Unit (MCU) checksum error (3A3) | 1 | Network |
| U121482 | CAN communication: Motor Control Unit (MCU) counter error (3A3) | 1 | Network |
| Code | Description | Brands | System |
|---|---|---|---|
| U121A | Lost communication with Infotainment Head Unit (IHU) module | 2 | Network |
| U121B | Lost communication with Instrument Cluster Module | 2 | Network |
| U121C | Lost communication with TBOXS | 2 | Network |
| U121D | Lost communication with Passive Entry Passive Start | 8 | Network |
| U121E | Vehicle Control Unit (VCU) CAN 1 network segment lost communication with FCM | 9 | Network |
| U121F | Vehicle Control Unit (VCU) CAN 1 network segment lost communication with Automatic Parking Assist | 2 | Network |
| U121001 | SBC SPI Fehler - General Electric Failure | 1 | Network |
| U121082 | CAN communication: Battery Management System (BMS) counter error (1D9) | 1 | Network |
| U121101 | SBC SPOC Fehler - General Electric Failure | 1 | Network |
| U121183 | CAN communication: Motor Control Unit (MCU) checksum error (1E2) | 1 | Network |
| U121200 | Communication with the energy management CAN bus has a malfunction | 1 | Network |
| U121201 | HW Emergency Active - General Electric Failure | 1 | Network |
| U121282 | CAN communication: Motor Control Unit (MCU) counter error (1E2) | 1 | Network |
| U121383 | CAN communication: Motor Control Unit (MCU) checksum error (3A3) | 1 | Network |
| U121482 | CAN communication: Motor Control Unit (MCU) counter error (3A3) | 1 | Network |
Advanced: scanner vehicle and live-data matches
Vehicles 1
Vehicle data covers only some brands. These matches come from scanner data, not from a full vehicle index, so treat them as approximate.
| Brand | Model / variant | Details |
|---|---|---|
| Peugeot | MP_COMPTEUR_APPARITION_DEFAUT_U121881 |
Live data 1
| Brand | Parameter | Units | Min | Max |
|---|---|---|---|---|
| Peugeot | MP_COMPTEUR_APPARITION_DEFAUT_U121881 | - | 0 | - |
These tables come from diagnostic data. They are useful for advanced users and can be ignored for a normal code lookup.