NetworkU0402
SeriousSeverity: Serious - have it checked soon
Invalid Data Received From TCM
Key terms: Control module: a small computer that runs one part of the car · SAE J2012: the standard generic code list
1What it means in plain English
Control modules in the car cannot communicate with each other over the vehicle network.
2Common causes
- Wiring or connector fault on the communication bus
- Faulty control module
- Low battery voltage or poor ground
- Water ingress in a connector or module
- Aftermarket device interfering with the bus
3Can I drive?
The car may run normally or may not run at all. If the module that has lost communication controls steering, brakes, park brake, charging or engine cooling, drive only if those systems feel normal; stop safely if the steering becomes heavy, a brake warning appears, or the engine temperature climbs. If the car will not start or runs badly, have it towed.
This page gives general information. It is not professional advice. For a definite diagnosis and a repair quote, ask a qualified mechanic to inspect the car.
4Brand data 35
| Brand | Code | Description | System |
|---|---|---|---|
| Ashok Leyland CV | U0402 | Invalid Data Received From TCM SAE | Network |
| BAIC Motor | U0402 | Invalid Data Received From TCM Brand | Network |
| Mercedes-Benz | U0402 | Invalid Data Received From TCM SAE | Network |
| BYD | U0402 | Invalid Data Received From TCM Brand | Network |
| Chery | U0402 | Invalid Data Received From TCM Brand | Network |
| Chrysler | U0402 | Invalid Data Received From TCM SAE | Network |
| Daewoo | U0402 | Invalid Data Received From TCM Brand | Network |
| DFFS | U0402 | TCU invalid data Brand | Network |
| DFFX | U0402 | Invalid Data Received From TCM Brand | Network |
| DFXK | U0402 | Invalid Data Received From TCM Brand | Network |
| EOBD | U0402 | Kehtetu andme saamine TCM-st Brand | Network |
| Geely | U0402 | Invalid Data Received From TCM Brand | Network |
| GM | U0402 | Invalid Data Received From TCM Brand | Network |
| Great Wall | U0402 | Invalid Data Received From TCM Brand | Network |
| Hafei | U0402 | Invalid Data Received From TCM Brand | Network |
| Holden | U0402 | Invalid Data Received From Transmission Control Module Brand | Network |
| Honda | U0402 | 68 (Automatic Transmission (CVT) Control Unit (PGM-FI ECU) Fault) (Autopilot Camera) This fault code is caused by other faults, therefore no further diagnosis is required. Please diagnose other fault codes first, and then clear this fault code. Fault Location and Cause Estimation Brand | Network |
| Hyundai | U0402 | Invalid Data Received From TCM SAE | Network |
| Isuzu | U0402 | Invalid Data Received From TCM SAE | Network |
| Land Rover | U0402 | Invalid Data Received From TCM SAE | Network |
| Maserati | U0402 | Implausible Data Received From Transmission control module Invalid Serial Data Received Brand | Network |
| Mitsubishi | U0402 | Invalid Data Received From TCM SAE | Network |
| Opel | U0402 | Invalid Data Received From TCM Brand | Network |
| Peugeot | U0402 | Invalid Data Received From TCM SAE | Network |
| Porsche | U0402 | Invalid Data Received From TCM SAE | Network |
| Proton | U0402 | Invalid Data Received From TCM SAE | Network |
| Saab | U0402 | Invalid Data Received From TCM Brand | Network |
| MG (SAIC) | U0402 | Invalid Gear Signal Received Brand | Network |
| Smart | U0402 | Invalid Data Received From TCM SAE | Network |
| Sprinter | U0402 | Invalid Data Received From TCM SAE | Network |
| Subaru | U0402 | Invalid Data Received From TCM SAE | Network |
| Suzuki | U0402 | Invalid Data Received From TCM Brand | Network |
| Tata | U0402 | Invalid Data Received From Transmission Control Module Brand | Network |
| Toyota | U0402 | Invalid data received from TCM Brand | Network |
| Volkswagen | U0402 | Implausible data received from transmission control module Brand | Network |
Legend: SAE is the generic J2012 description; Brand is text taken from that manufacturer’s data. Manufacturer rows keep the wording and language of the source data, and non-English text is tagged so screen readers pronounce it correctly.
5Extended variant codes 13
These 7-character codes are manufacturer-specific variants of U0402 and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| Mercedes-Benz | U040200 | Signal error 'Gr' (TCM) Brand | Network |
| SsangYong | U040200 | CAN: TCU Signal Error Brand | Network |
| Mercedes-Benz | U040202 | Implausible data were received from control unit 'Transmission'. There is a general signal fault. Brand | Network |
| SsangYong | U040281 | CAN communication: Vehicle Control Unit (VCU) message error Brand | Network |
| Mercedes-Benz | U040283 | Botschaften vom CPC (TCM)-SG (Getriebesteuergerät) führen zu einem kumulierten Fehler. Brand | Network |
| Mercedes-Benz | U040286 | Implausible data were received from control unit 'Transmission'. There is an incorrect signal. Brand | Network |
| Mercedes-Benz | U0402E2 | No description available | Network |
| Mercedes-Benz | U0402E3 | Gear signal error Brand | Network |
| Mercedes-Benz | U0402E8 | No description available | Network |
| Mercedes-Benz | U0402EE | No description available | Network |
| Mercedes-Benz | U0402FA | Das FlexRay-Signal GR (Istgang) oder GR_Target (Zielgang) vom TCM-SG (Getriebesteuergerät) ist fehlerhaft. Brand | Network |
| Mercedes-Benz | U0402FB | Das FlexRay-Signal EngWhlTrqRatio_TCM (bersetzung) vom TCM-SG (Getriebesteuergerät) ist fehlerhaft. Brand | Network |
| Mercedes-Benz | U0402FE | invalid REGEN signals received from PCM/VSC Brand | Network |
6Related codes
Browse Uxxx codes or U040xx codes.