PowertrainP1123
CautionSeverity: Caution - get it checked when you can
Signal too large
Key terms: Control module: a small computer that runs one part of the car · Powertrain: engine, transmission and emissions
1What it means in plain English
The engine or powertrain control system has stored a fault that does not have specific guidance in this database yet.
2Common causes
- Sensor or actuator fault
- Wiring or connector fault
- Vacuum or intake leak
- Fuel or ignition problem
- Control module fault
3Can I drive?
Have it diagnosed promptly. If the car runs and drives normally, drive gently to a workshop. If it runs badly, stalls, overheats, loses oil pressure, or a warning light is flashing or red, stop safely and get professional help. If the code concerns the brakes, brake vacuum or brake assist, do not drive until it is checked: a hard pedal or longer stopping distance means stop.
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 28
| Brand | Code | Description | System |
|---|---|---|---|
| Ashok Leyland CV | P1123 | Variable Effort Steering Control Module. Communication Error Brand | Powertrain |
| Mercedes-Benz | P1123 | No description available | Powertrain |
| BMW | P1123 | Signal too large Brand | Powertrain |
| BYD | P1123 | NO. 292 battery voltage sampling wire loop fault Brand | Powertrain |
| Chery | P1123 | Fuel Trim Air: Bank 1 (Add): System too Rich Brand | Powertrain |
| Daewoo | P1123 | Oxygen Sensor Heating Brand | Powertrain |
| Daihatsu | P1123 | Coolant flow control valve position sensor circuit high Brand | Powertrain |
| DFFS | P1123 | No description available | Powertrain |
| DFXK | P1123 | Fuel Trim Air: Bank 1 (Add): System too Rich Brand | Powertrain |
| EOBD | P1123 | PTO-system ytelse Brand | Powertrain |
| Geely | P1123 | Fuel Trim Air: Bank 1 (Add): System too Rich Brand | Powertrain |
| GM | P1123 | Oxygen Sensor Heating Brand | Powertrain |
| Great Wall | P1123 | Air temperature sensor signal low Brand | Powertrain |
| Holden | P1123 | No description available | Powertrain |
| Hyundai | P1123 | No description available | Powertrain |
| Isuzu | P1123 | No description available | Powertrain |
| Land Rover | P1123 | No description available | Powertrain |
| Mahindra | P1123 | No description available | Powertrain |
| Mitsubishi | P1123 | No description available | Powertrain |
| Opel | P1123 | Oxygen Sensor Heating Brand | Powertrain |
| Perodua | P1123 | Coolant flow control valve position sensor circuit high Brand | Powertrain |
| Peugeot | P1123 | No description available | Powertrain |
| Porsche | P1123 | Lambdaregelungsadaption Bereich 1 - Mageranschlag Brand | Powertrain |
| Saab | P1123 | Oxygen Sensor Heating Brand | Powertrain |
| Sprinter | P1123 | No description available | Powertrain |
| Suzuki | P1123 | ETC MOT RLY/CIRC Brand | Powertrain |
| Tata | P1123 | Air Fuel Adaptation Fault Brand | Powertrain |
| Toyota | P1123 | ETC motor relay/circuit Brand | Powertrain |
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 3
These 7-character codes are manufacturer-specific variants of P1123 and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| Mercedes-Benz | P112300 | Crash Sensor Voltage - Too Low Brand | Powertrain |
| SsangYong | P112300 | Used to reduce the torque (with a relevant fault group) in case of pedal_corel or pedal_track faults Brand | Powertrain |
| SsangYong | P112314 | Cooling fan Pulse-Width Modulation (PWM) circuit open or short to ground Brand | Powertrain |
6Related codes
Browse Pxxx codes or P112xx codes.