PowertrainP181B
CautionSeverity: Caution - get it checked when you can
Clutch actuator changeover solenoid low
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 13
| Brand | Code | Description | System |
|---|---|---|---|
| Chery | P181B | Water pump failure Brand | Powertrain |
| Daihatsu | P181B | Shift position sensor signal comparison error Brand | Powertrain |
| DFXK | P181B | Motor controller phase current sensor fault Brand | Powertrain |
| EOBD | P181B | Kobling 1 Brand | Powertrain |
| Land Rover | P181B | Clutch actuator changeover solenoid - low Brand | Powertrain |
| Mahindra | P181B | No description available | Powertrain |
| Mitsubishi | P181B | Clutch1 pressure too low Brand | Powertrain |
| Perodua | P181B | Shift position sensor signal comparison error Brand | Powertrain |
| Porsche | P181B | No description available | Powertrain |
| Proton | P181B | Clutch1 pressure too low Brand | Powertrain |
| Tata | P181B | No description available | Powertrain |
| Toyota | P181B | Clutch actuator changeover solenoid low Brand | Powertrain |
| Volkswagen | P181B | Gear Reconition sensor: electrical malfunction; Mechanical failure 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 4
These 7-character codes are manufacturer-specific variants of P181B and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| Porsche | P181B00 | Gear recognition sensor Electrical error Brand | Powertrain |
| Mercedes-Benz | P181B09 | The DIRECT SELECT manual shift has a malfunction. Component Failure. Brand | Powertrain |
| Mercedes-Benz | P181B29 | The DIRECT SELECT manual shift has a malfunction. Signal Invalid. Brand | Powertrain |
| Mercedes-Benz | P181B2A | The DIRECT SELECT manual shift has a malfunction. Signal Stuck In Range. Brand | Powertrain |
6Related codes
Browse Pxxx codes or P181xx codes.