Fault code lookup

NetworkU0115

Serious

Severity: Serious - have it checked soon

Lost Communication With ECM/PCM B

32 brands affected · Generic SAE J2012 description.

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

  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 32

BrandCodeDescriptionSystem
Ashok Leyland CVU0115Water In Fuel Present BrandNetwork
BAIC MotorU0115Lost Communication With ECM/PCM B BrandNetwork
Mercedes-BenzU0115Lost Communication With ECM/PCM B SAENetwork
BYDU0115Lost Communication With ECM/PCM B BrandNetwork
CheryU0115Communication with ECM failed BrandNetwork
DaewooU0115Lost Communication With ECM/PCM B BrandNetwork
DaihatsuU0115Ion communication BrandNetwork
DFFSU0115Lost Communication With ECM/PCM B BrandNetwork
DFFXU0115Lost Communication With ECM/PCM B BrandNetwork
DFXKU0115Lost Communication With ECM/PCM B BrandNetwork
EOBDU0115Kaotatud side ECM/PCMi B-ga BrandNetwork
GeelyU0115No CAN signal from EMS BrandNetwork
GMU0115Lost Communication With ECM/PCM B BrandNetwork
Great WallU0115Lost Communication With ECM/PCM B BrandNetwork
HafeiU0115Lost Communication With ECM/PCM B BrandNetwork
HondaU0115Lost Communication with ECM/PCM "B BrandNetwork
HyundaiU0115Lost Communication With ECM/PCM B SAENetwork
IsuzuU0115Lost Communication With ECM/PCM B SAENetwork
Land RoverU0115Lost Communication With ECM/PCM 'B' BrandNetwork
MitsubishiU0115Lost Communication With ECM/PCM B SAENetwork
NissanU0115Lost Communication With ECM/PCM B SAENetwork
OpelU0115Lost Communication With ECM/PCM B BrandNetwork
PeroduaU0115Ion communication BrandNetwork
PeugeotU0115Lost Communication With ECM/PCM B SAENetwork
ProtonU0115Lost Communication With ECM/PCM B SAENetwork
SaabU0115Lost Communication With ECM/PCM B BrandNetwork
Maxus (SAIC)U0115Lost communication with ECM_NF2 BrandNetwork
MG (SAIC)U0115Lost Communication With ECM/PCM B BrandNetwork
SprinterU0115Lost Communication With ECM/PCM B SAENetwork
TataU0115Lost Communication With ECM/PCM 'B' BrandNetwork
ToyotaU0115Lost communication with ECM/PCM B BrandNetwork
VolkswagenU0115Second (Slave) engine control module: no communication BrandNetwork

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 21

These 7-character codes are manufacturer-specific variants of U0115 and may be reported by some scan tools.

BrandCodeDescriptionSystem
Mercedes-BenzU011500CPC signal Time-out BrandNetwork
Mercedes-BenzU011508Botschaften vom CPC SG führen in der IDC zu einem Signalfehler. BrandNetwork
Mercedes-BenzU011531Die Kommunikation mit dem Steuergerät 'Antriebsstrang' hat Funktionsstörung. Das Signal ist nicht vorhanden. - no signal BrandNetwork
Mercedes-BenzU011581Communication with control unit 'Drivetrain' has a malfunction. Invalid Serial Data Received. BrandNetwork
SsangYongU011581Variant coding error: Smart Touch Panel Module (STPM) specification detection BrandNetwork
Mercedes-BenzU011582Communication with control unit 'DRIVETRAIN' has a malfunction. Counter error. BrandNetwork
Mercedes-BenzU011583Communication with control unit ''DRIVETRAIN' has a malfunction. CRC error. BrandNetwork
Mercedes-BenzU011586Communication error CPC (Eng_Rs3_Pr2, PT_Stat_Pr2) BrandNetwork
Mercedes-BenzU011587Timeout Error CPC BrandNetwork
SsangYongU011587CAN communication: Smart Touch Panel Module (STPM) message not received BrandNetwork
Mercedes-BenzU011589Communication with control unit 'Drivetrain' has a malfunction. An error during data transfer has occurred. BrandNetwork
Mercedes-BenzU0115E0Botschaften vom EIS SG führen in der IDC zu einem kumulierten Fehler. BrandNetwork
Mercedes-BenzU0115E1Das Signal PT4_PTCoor_AccelPdlPosn_D_Raw_ST3 wird mit einem ungültigem Wert empfangen BrandNetwork
Mercedes-BenzU0115E2Das Signal SADR_Stat_CPC_ST3 wird mit einem ungültigem Wert empfangen BrandNetwork
Mercedes-BenzU0115EECommunication with control unit Drivetrain has a malfunction. Counter byte when corresponding SAE Code is used more than one time BrandNetwork
Mercedes-BenzU0115EFDie Kommunikation mit dem Steuergerät 'Antriebsstrang' hat Funktionsstörung. BrandNetwork
Mercedes-BenzU0115FATimeout error CPC (TCM_Data2_AR2) BrandNetwork
Mercedes-BenzU0115FBTimeout error CPC (Eng_Rs_EngCtrl_AR2) BrandNetwork
Mercedes-BenzU0115FCCommunication error CPC (TCM_Data2_Pr2) BrandNetwork
Mercedes-BenzU0115FDCommunication error CPC (Eng_Rs_EngCtrl_Pr2) BrandNetwork
Mercedes-BenzU0115FESignal error 'AccelPdlPosn_Raw' or 'AccelPdlPosnSens_Flt' (CPC) BrandNetwork

6Related codes

  • U0110 Lost Communication With Drive Motor Control Module A
  • U0111 Lost Communication With Battery Energy Control Module A
  • U0112 Lost Communication With Battery Energy Control Module B
  • U0113 Lost Communication With Emissions Critical Control Information
  • U0114 Lost Communication With Four-Wheel Drive Clutch Control Module
  • U0116 Lost Communication With Coolant Temperature Control Module
  • U0117 Lost Communication With PTO Control Module
  • U0118 Lost Communication With Fuel Additive Control Module
  • U0119 Lost communication with fuel cell control module
  • U011A Lost Communication With Exhaust Gas Sensor Module
  • U011B Lost Communication With Rocker Arm Control Module A
  • U011C Lost communication with rocker arm control module 'B'

Browse Uxxx codes or U011xx codes.

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