ChassisC1690
CautionSeverity: Caution - get it checked when you can
ECU Relay Failure
Key terms: ABS: anti-lock braking, which stops the wheels locking · Stability control: helps stop the car skidding · Wheel speed sensor: measures how fast each wheel turns
1What it means in plain English
A chassis system has a fault, usually ABS, traction control or stability control, but some makes use this range for airbags, electric power steering or park brakes.
2Common causes
- Faulty wheel speed sensor
- Damaged sensor ring or wiring
- Faulty ABS module
- Low brake fluid
- Wheel bearing damage
3Can I drive?
If the code names an airbag or SRS system, the airbag may not deploy in a crash: have it diagnosed promptly. If it names electric power steering, the assist may fail and the steering can become heavy: stop safely if that happens. If it names the brakes or park brake, have it checked before driving when braking feels abnormal. Otherwise ABS and stability control may be disabled: drive carefully, especially in wet conditions, and have it checked soon.
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 6
| Brand | Code | Description | System |
|---|---|---|---|
| Ashok Leyland CV | C1690 | No description available | Chassis |
| Holden | C1690 | No description available | Chassis |
| Hyundai | C1690 | No description available | Chassis |
| Peugeot | C1690 | No description available | Chassis |
| MG (SAIC) | C1690 | ECU Relay Failure Brand | Chassis |
| Suzuki | C1690 | Sensor Not Aligned Brand | Chassis |
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 C1690 and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| Hyundai | C169087 | While communicating with ABS, TCS and ESP via CAN lines, if an invalid VSM signal is received, the LKAS unit generates the fault code and turns on the malfunction indicator lamp Brand | Chassis |
6Related codes
Browse Cxxx codes or C169xx codes.