PowertrainP1566
CautionSeverity: Caution - get it checked when you can
Signal reveals frequency error
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 25
| Brand | Code | Description | System |
|---|---|---|---|
| BAIC Motor | P1566 | Manufacturer Controlled DTC Brand | Powertrain |
| BMW | P1566 | Signal reveals frequency error Brand | Powertrain |
| BYD | P1566 | Start/stop main switch signal sticking Brand | Powertrain |
| Chery | P1566 | Load Signal from A/C Compressor: Implausible Signal Brand | Powertrain |
| Daewoo | P1566 | TCM B+ Voltage Low Brand | Powertrain |
| Daihatsu | P1566 | Input signal circuit Brand | Powertrain |
| DFFS | P1566 | Start/Stop main switch signal stuck Brand | Powertrain |
| DFXK | P1566 | Load Signal from A/C Compressor: Implausible Signal Brand | Powertrain |
| EOBD | P1566 | Accuspanning Brand | Powertrain |
| Ford | P1566 | No description available | Powertrain |
| Geely | P1566 | Load Signal from A/C Compressor: Implausible Signal Brand | Powertrain |
| GM | P1566 | TCM B+ Voltage Low Brand | Powertrain |
| Great Wall | P1566 | Vehicle speed below cruise target speed for a long time Brand | Powertrain |
| Honda | P1566 | No description available | Powertrain |
| Hyundai | P1566 | No description available | Powertrain |
| Land Rover | P1566 | Related faults: P1567 Brand | Powertrain |
| Maserati | P1566 | No description available | Powertrain |
| Mazda | P1566 | No description available | Powertrain |
| Mitsubishi | P1566 | ENG-ACC control state mismatch Brand | Powertrain |
| Perodua | P1566 | Input signal circuit Brand | Powertrain |
| Peugeot | P1566 | No description available | Powertrain |
| Proton | P1566 | ENG-ACC control state mismatch Brand | Powertrain |
| Saab | P1566 | TCM B+ Voltage Low Brand | Powertrain |
| Subaru | P1566 | No description available | Powertrain |
| Toyota | P1566 | Start/Stop main switch signal bonding 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 1
These 7-character codes are manufacturer-specific variants of P1566 and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| SsangYong | P156600 | Off switch button activated for a too long time Brand | Powertrain |
6Related codes
Browse Pxxx codes or P156xx codes.