BodyB1721
CautionSeverity: Caution - get it checked when you can
mirror left and right control switch circuit
Key terms: Control module: a small computer that runs one part of the car
1What it means in plain English
A body system has a fault. Depending on the make, this range can include airbags and seat belts, windows, locks and climate control, and also charging, brake, oil or coolant sensors.
2Common causes
- Wiring or connector fault
- Faulty sensor or switch
- Water or corrosion in a connector
- Control module fault
- Low battery voltage
3Can I drive?
Do not assume this code is safe to drive. If it concerns the brakes, brake vacuum, charging/alternator, engine oil or coolant, have it diagnosed before driving. Airbags or seat belts may not work in a crash, and a brake or charging fault can leave the car unsafe or stranded. For convenience systems (windows, locks, climate), have it checked when convenient.
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 18
| Brand | Code | Description | System |
|---|---|---|---|
| Mercedes-Benz | B1721 | No description available | Body |
| BYD | B1721 | Immobilizer-basestation fail Brand | Body |
| Chery | B1721 | Immobilizer-basestation fail Brand | Body |
| Daewoo | B1721 | No description available | Body |
| DFFS | B1721 | Door and window central locking failure Brand | Body |
| DFFX | B1721 | Immobilizer-basestation fail Brand | Body |
| Geely | B1721 | Immobilizer-basestation fail Brand | Body |
| GM | B1721 | mirror left and right control switch circuit Brand | Body |
| Great Wall | B1721 | Immobilizer-basestation fail Brand | Body |
| Hafei | B1721 | Immobilizer-basestation fail Brand | Body |
| Holden | B1721 | Comfort Close Enable Circuit Brand | Body |
| Land Rover | B1721 | No description available | Body |
| Mitsubishi | B1721 | Immobilizer-basestation fail Brand | Body |
| Opel | B1721 | mirror left and right control switch circuit Brand | Body |
| Peugeot | B1721 | No description available | Body |
| Proton | B1721 | Immobilizer-basestation fail Brand | Body |
| Saab | B1721 | mirror left and right control switch circuit Brand | Body |
| Smart | B1721 | No description available | Body |
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.
5Related codes
Browse Bxxx codes or B172xx codes.