PowertrainP1386
CautionSeverity: Caution - get it checked when you can
Knock-evaluation circuit faulty
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 30
| Brand | Code | Description | System |
|---|---|---|---|
| Mercedes-Benz | P1386 | No description available | Powertrain |
| BMW | P1386 | Knock-evaluation circuit faulty Brand | Powertrain |
| BYD | P1386 | NO. 135 battery voltage sampling wire loop fault Brand | Powertrain |
| Chery | P1386 | Internal Control Module Malfunction Brand | Powertrain |
| Chrysler | P1386 | Knock sensor system fault Brand | Powertrain |
| Daewoo | P1386 | Knock Control Test Pulse Brand | Powertrain |
| Daihatsu | P1386 | Fuel additive valve system Brand | Powertrain |
| DFFS | P1386 | Knock detector signal failure Brand | Powertrain |
| DFXK | P1386 | Internal Control Module Malfunction Brand | Powertrain |
| EOBD | P1386 | Startreläfel Brand | Powertrain |
| Geely | P1386 | Internal Control Module Malfunction Brand | Powertrain |
| GM | P1386 | Knock Control Test Pulse Brand | Powertrain |
| Holden | P1386 | Knock Control Signal Malfunction Brand | Powertrain |
| Honda | P1386 | No description available | Powertrain |
| Hyundai | P1386 | No description available | Powertrain |
| Land Rover | P1386 | No description available | Powertrain |
| Mahindra | P1386 | No description available | Powertrain |
| Maserati | P1386 | No description available | Powertrain |
| Opel | P1386 | Knock Control Test Pulse Brand | Powertrain |
| Perodua | P1386 | Fuel additive valve system Brand | Powertrain |
| Peugeot | P1386 | No description available | Powertrain |
| Porsche | P1386 | Klopfregelung Fehler Testimpuls Brand | Powertrain |
| Proton | P1386 | No description available | Powertrain |
| Saab | P1386 | Knock Control Test Pulse Brand | Powertrain |
| MG (SAIC) | P1386 | Diagnostic Fault Check Knock Control Signal Evaluation Brand | Powertrain |
| Smart | P1386 | No description available | Powertrain |
| Sprinter | P1386 | No description available | Powertrain |
| Suzuki | P1386 | Starter Relay malfunction Brand | Powertrain |
| Toyota | P1386 | Knock detector signal failure Brand | Powertrain |
| Volkswagen | P1386 | Control module malfunction - knock sensing monitoring; No signal/communication 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 P1386 and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| Mercedes-Benz | P138600 | DebEvent TypError Prio3 2Trip IUMPR - BW Brand | Powertrain |
| Volkswagen | P138600 | Control unit defective Brand | Powertrain |
| Peugeot | P138664 | No description available | Powertrain |
6Related codes
Browse Pxxx codes or P138xx codes.