NetworkU1DD2
SeriousSeverity: Serious - have it checked soon
No description available
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?
Serious · drive with care
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 1
| Brand | Code | Description | System |
|---|---|---|---|
| Mercedes-Benz | U1DD2 | No description available | 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 56
These 7-character codes are manufacturer-specific variants of U1DD2 and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| Mercedes-Benz | U1DD201 | Range of development fault memory There is a general electrical fault. Brand | Network |
| Mercedes-Benz | U1DD202 | Range of development fault memory There is a general signal fault. Brand | Network |
| Mercedes-Benz | U1DD210 | Range of development fault memory Brand | Network |
| Mercedes-Benz | U1DD211 | Range of development fault memory There is a short circuit to ground. Brand | Network |
| Mercedes-Benz | U1DD212 | Range of development fault memory There is a short circuit to positive. Brand | Network |
| Mercedes-Benz | U1DD213 | energy request from the vehicle is not processed for S1 closure, but is converted to DCDCOnly mode request due to Low SOC condition Brand | Network |
| Mercedes-Benz | U1DD214 | CAN wakeup is disabled due to minimum cell voltage Brand | Network |
| Mercedes-Benz | U1DD225 | Range of development fault memory There is a faulty signal waveform. Brand | Network |
| Mercedes-Benz | U1DD226 | Range of development fault memory The signal change rate is below the permissible limit value. Brand | Network |
| Mercedes-Benz | U1DD228 | T30 and T31 temperature differ over 10C Brand | Network |
| Mercedes-Benz | U1DD229 | Range of development fault memory There is an invalid signal. Brand | Network |
| Mercedes-Benz | U1DD230 | Range of development fault memory Brand | Network |
| Mercedes-Benz | U1DD231 | Range of development fault memory The signal is not present. Brand | Network |
| Mercedes-Benz | U1DD232 | Range of development fault memory The off-time of the signal frequency is too short. Brand | Network |
| Mercedes-Benz | U1DD233 | Range of development fault memory The off-time of the signal frequency is too long. Brand | Network |
| Mercedes-Benz | U1DD234 | No description available | Network |
| Mercedes-Benz | U1DD235 | Balancing started for no reason Brand | Network |
| Mercedes-Benz | U1DD236 | If input temp invalid for actual capacity determination Brand | Network |
| Mercedes-Benz | U1DD237 | If the aging factor (AF) has an out of range fault Brand | Network |
| Mercedes-Benz | U1DD238 | CAN Timeout Error Brand | Network |
| Mercedes-Benz | U1DD239 | CAN Bus Off Error Brand | Network |
| Mercedes-Benz | U1DD240 | Watchdog Error Brand | Network |
| Mercedes-Benz | U1DD241 | ADuC_SPI Timeout Error Brand | Network |
| Mercedes-Benz | U1DD242 | UART Timeout Error Brand | Network |
| Mercedes-Benz | U1DD243 | E2E Ignition Switch State error Brand | Network |
| Mercedes-Benz | U1DD244 | E2E Vehicle Stop State error Brand | Network |
| Mercedes-Benz | U1DD245 | Shunt Temperature Implausible Brand | Network |
| Mercedes-Benz | U1DD246 | ADuC Watchdog CB Off Error Brand | Network |
| Mercedes-Benz | U1DD247 | CB Charge Pump Voltage too low Brand | Network |
| Mercedes-Benz | U1DD248 | ShuntTemperature sensor has a plausible fault Brand | Network |
| Mercedes-Benz | U1DD250 | Terminal Voltage Signal Timeout Error due to SPI Timeout fail Brand | Network |
| Mercedes-Benz | U1DD251 | Terminal Voltage Plausible Error Brand | Network |
| Mercedes-Benz | U1DD252 | PackVoltage invalid due to SPI timeout error Brand | Network |
| Mercedes-Benz | U1DD253 | Input paths Path open circuit Brand | Network |
| Mercedes-Benz | U1DD254 | Main Current Signal Timeout Brand | Network |
| Mercedes-Benz | U1DD255 | Redundant current plausibility error (Main current - Redundant current) Brand | Network |
| Mercedes-Benz | U1DD256 | Main current plausibility error (Main current - Redundant current) at Mid range Brand | Network |
| Mercedes-Benz | U1DD257 | Main current plausibility error (Main current - Redundant current) at High Range Brand | Network |
| Mercedes-Benz | U1DD258 | Main Current invalid due to internal fault Brand | Network |
| Mercedes-Benz | U1DD259 | Redundant current measurement path Open circuit Brand | Network |
| Mercedes-Benz | U1DD260 | Redundant current out of Range High Brand | Network |
| Mercedes-Benz | U1DD261 | Redundant currrent out of Range Low Brand | Network |
| Mercedes-Benz | U1DD263 | Redundant current stuck at constant Brand | Network |
| Mercedes-Benz | U1DD264 | Current measurment is faulty (both redundant and Main current) Brand | Network |
| Mercedes-Benz | U1DD265 | System current OORL Brand | Network |
| Mercedes-Benz | U1DD268 | System current OORH Brand | Network |
| Mercedes-Benz | U1DD269 | System current Signal timeout due to SPI timeout Brand | Network |
| Mercedes-Benz | U1DD270 | System current internal fault Brand | Network |
| Mercedes-Benz | U1DD271 | DCB is aged Brand | Network |
| Mercedes-Benz | U1DD273 | Short circuit in partial mode Brand | Network |
| Mercedes-Benz | U1DD274 | Cell Temperature Sensor1 open Wire Brand | Network |
| Mercedes-Benz | U1DD275 | Cell Temperature Sensor2 open Wire Brand | Network |
| Mercedes-Benz | U1DD277 | Discharge current FUSE BLOW Brand | Network |
| Mercedes-Benz | U1DD278 | Charge current FUSE BLOW Brand | Network |
| Mercedes-Benz | U1DD279 | ADUC MemoryError Brand | Network |
| Mercedes-Benz | U1DD280 | ADUC ProcessingError Brand | Network |
6Related codes
Browse Uxxx codes or U1DDxx codes.