PowertrainP1720
CautionSeverity: Caution - get it checked when you can
SMG: CAN bus 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 36
| Brand | Code | Description | System |
|---|---|---|---|
| BAIC Motor | P1720 | Gear 1 shift failed Brand | Powertrain |
| BMW | P1720 | SMG: CAN bus error Brand | Powertrain |
| BYD | P1720 | 57 gear sensor 2 short to ground Brand | Powertrain |
| Chery | P1720 | PEPS check failure Brand | Powertrain |
| Chrysler | P1720 | loss of output speed / wheel speed Brand | Powertrain |
| Daewoo | P1720 | Vehicle Speed (Meter) Circuit Brand | Powertrain |
| Daihatsu | P1720 | DC clutch forced release circuit Brand | Powertrain |
| DFFS | P1720 | No description available | Powertrain |
| DFFX | P1720 | Vehicle speed sensor signal line Brand | Powertrain |
| DFXK | P1720 | Hardware brake pedal failure Brand | Powertrain |
| EOBD | P1720 | ECU fault Brand | Powertrain |
| Fiat | P1720 | Output speed sensor/Wheel speed rationality Brand | Powertrain |
| Geely | P1720 | Vehicle speed sensor signal line Brand | Powertrain |
| GM | P1720 | Vehicle Speed (Meter) Circuit Brand | Powertrain |
| Great Wall | P1720 | Vehicle speed sensor signal line Brand | Powertrain |
| Hafei | P1720 | Vehicle speed sensor signal line Brand | Powertrain |
| Holden | P1720 | Backup Lamps Relay Circuit Brand | Powertrain |
| Honda | P1720 | Park/Neutral Switch Output Circuit Brand | Powertrain |
| Isuzu | P1720 | No description available | Powertrain |
| Land Rover | P1720 | No description available | Powertrain |
| Mahindra | P1720 | No description available | Powertrain |
| Maserati | P1720 | No description available | Powertrain |
| Mitsubishi | P1720 | Clutch torque t/m capacity loss Brand | Powertrain |
| Nissan | P1720 | No description available | Powertrain |
| Opel | P1720 | Vehicle Speed (Meter) Circuit Brand | Powertrain |
| Perodua | P1720 | DC clutch forced release circuit Brand | Powertrain |
| Peugeot | P1720 | No description available | Powertrain |
| Porsche | P1720 | Oil Pressure Switch No. 2 Brand | Powertrain |
| Proton | P1720 | Clutch torque t/m capacity loss Brand | Powertrain |
| Saab | P1720 | Vehicle Speed (Meter) Circuit Brand | Powertrain |
| Smart | P1720 | No description available | Powertrain |
| Subaru | P1720 | DCCD CAN system circuit Brand | Powertrain |
| Suzuki | P1720 | Neutral control solenoid electrical Brand | Powertrain |
| Tata | P1720 | No description available | Powertrain |
| Toyota | P1720 | Vehicle speed (meter) circuit Brand | Powertrain |
| Volkswagen | P1720 | Gearbox output speed 1 implausible signal 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 P1720 and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| SsangYong | P172000 | Defective EEPROM Brand | Powertrain |
6Related codes
Browse Pxxx codes or P172xx codes.