NetworkU1439
SeriousSeverity: Serious - have it checked soon
Dynamic Range Error
Key terms: Control module: a small computer that runs one part of the car
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 11
| Brand | Code | Description | System |
|---|---|---|---|
| BYD | U1439 | Dynamic Range Error Brand | Network |
| Chery | U1439 | Dynamic Range Error Brand | Network |
| Chrysler | U1439 | implausible / missing programmed axle ratio Brand | Network |
| DFFX | U1439 | Dynamic Range Error Brand | Network |
| EOBD | U1439 | Dynamic range error Brand | Network |
| Geely | U1439 | Dynamic Range Error Brand | Network |
| Great Wall | U1439 | Dynamic Range Error Brand | Network |
| Hafei | U1439 | Dynamic Range Error Brand | Network |
| Mitsubishi | U1439 | Dynamic range error Brand | Network |
| Proton | U1439 | Dynamic range error Brand | Network |
| Suzuki | U1439 | Invalid Data Received From Power Steering Control Module - Checksum Error 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 7
These 7-character codes are manufacturer-specific variants of U1439 and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| Mercedes-Benz | U143929 | Botschaften vom MAP-Steuergerät werden mit ungültigem Wert oder mit Fehler gesendet Brand | Network |
| Mercedes-Benz | U143941 | Botschaft vom MAP-Steuergerät zeigen einen Fehler im Botschaftszähler oder CRC-Fehler Brand | Network |
| Mercedes-Benz | U143982 | Botschaft vom MAP SG führen in der IDC zu einem kumulierten Fehler Brand | Network |
| Mercedes-Benz | U1439E0 | Botschaften vom MAP-Steuergerät zeigen einen Fehler an Brand | Network |
| Mercedes-Benz | U1439E1 | Das Signal MIC_MAP zeigt einen Fehler an Brand | Network |
| Mercedes-Benz | U1439E2 | Das Signal DAP_Map_Scram zeigt einen Fehler an. Brand | Network |
| Mercedes-Benz | U1439E3 | Botschaft vom MAP SG wird zeitweise nicht empfangen Brand | Network |
6Related codes
Browse Uxxx codes or U143xx codes.