Fault code lookup

NetworkU1DD3

Serious

Severity: Serious - have it checked soon

No description available

1 brand affected · 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

  1. Wiring or connector fault on the communication bus
  2. Faulty control module
  3. Low battery voltage or poor ground
  4. Water ingress in a connector or module
  5. 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

BrandCodeDescriptionSystem
Mercedes-BenzU1DD3No 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 36

These 7-character codes are manufacturer-specific variants of U1DD3 and may be reported by some scan tools.

BrandCodeDescriptionSystem
Mercedes-BenzU1DD301Manufacturer Controlled DTC - The pump failure in SOPT of slave path BrandNetwork
Mercedes-BenzU1DD302Redundant Current Measurement Uncalibrated Fault BrandNetwork
Mercedes-BenzU1DD303ASIC internal errors BrandNetwork
Mercedes-BenzU1DD304CellVoltage Implausible BrandNetwork
Mercedes-BenzU1DD305Pack Voltage Implausible BrandNetwork
Mercedes-BenzU1DD306Terminal Voltage Implausible BrandNetwork
Mercedes-BenzU1DD307Manufacturer Controlled DTC -Diagnosis of GND loss BrandNetwork
Mercedes-BenzU1DD308Manufacturer Controlled DTC - Diagnosis of KL30 over voltage BrandNetwork
Mercedes-BenzU1DD312CMM internal errors BrandNetwork
Mercedes-BenzU1DD313CMM Measurement value stuck BrandNetwork
Mercedes-BenzU1DD314Circuit Breaker Damaged - Stuck Open Critical BrandNetwork
Mercedes-BenzU1DD315SBC_SPI Timeout BrandNetwork
Mercedes-BenzU1DD318ADuC Timer wakeup Error BrandNetwork
Mercedes-BenzU1DD319ADuC CEB counter wakeup Error BrandNetwork
Mercedes-BenzU1DD320Nfault wakeup error BrandNetwork
Mercedes-BenzU1DD321Critical Error Bit BrandNetwork
Mercedes-BenzU1DD322No description available Network
Mercedes-BenzU1DD323No description available Network
Mercedes-BenzU1DD324ADUC SPIError BrandNetwork
Mercedes-BenzU1DD325LiBB Power Supply Error - PMIC WDG Test Error BrandNetwork
Mercedes-BenzU1DD326Terminal Voltage Stuck at constant BrandNetwork
Mercedes-BenzU1DD327ADuC detailed error-Battery current error BrandNetwork
Mercedes-BenzU1DD328ADuC detailed error-Pack voltage error BrandNetwork
Mercedes-BenzU1DD329ADuC detailed error-T30 voltage error BrandNetwork
Mercedes-BenzU1DD330CAN Transceiver Error BrandNetwork
Mercedes-BenzU1DD331PMIC SPI lost BrandNetwork
Mercedes-BenzU1DD332Security core Error BrandNetwork
Mercedes-BenzU1DD333Microcontroller DMA Error BrandNetwork
Mercedes-BenzU1DD334Charge Over Current (iSCP) BrandNetwork
Mercedes-BenzU1DD335Charge Over Current (iSCP) in critical temperature BrandNetwork
Mercedes-BenzU1DD336Critical End Of Life Reached BrandNetwork
Mercedes-BenzU1DD339Persistent SBC_SPI Timeout Error BrandNetwork
Mercedes-BenzU1DD340Serial number Incorrect BrandNetwork
Mercedes-BenzU1DD379No description available Network
Mercedes-BenzU1DD380No description available Network
Mercedes-BenzU1DD381No description available Network

6Related codes

Browse Uxxx codes or U1DDxx codes.

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