DTC code
C1179
Speed Control Actuator Assembly Cable Slack Failure
Technical guide
Symptoms
- ABS
- VDC/SLIP and brake warning lights illuminated
- ABS engaging when the brake pedal is applied only lightly
- pedal pressure changing dramatically / jerking while stopping
- front end feels unstable when braking
- degraded stability control operation. Sources advise against driving with this code because ABS performance is compromised.
Probable causes
- Faulty delta stroke sensor
- damaged wiring or connectors in the ABS system
- ABS control module (actuator) issues
- contaminated brake fluid or air in the brake lines affecting sensor readings.
Diagnostic steps
- Retrieve codes with a professional scan tool that reads the ABS/VDC module and record freeze frame data.
- Visually inspect ABS system wiring and connectors, especially around the master cylinder/brake actuator, for damage or poor connections.
- Check brake fluid condition and bleed the system if fluid contamination or air in the lines is suspected, since both can skew sensor readings.
- Test the delta stroke sensor's operation per the service procedure.
- If the hardware checks out, reprogram the ABS/VDC control unit per the applicable Technical Service Bulletin BEFORE replacing parts - a TSB reflash is documented for this code.
- If the sensor is confirmed faulty, replace it (on several models it is serviced with the brake actuator assembly), then clear codes and road test.
Cross-checked technical synthesis (QA). It does not replace the manufacturer's procedure.
Models most reported with this code (NHTSA)
Count of distinct owner complaints mentioning the code. US data — same engines, same failures.
AI here is a librarian: this page shows only what mechanics confirmed, or says “unknown”. It never suggests a diagnosis — MECCANIC interprets the code, never your car.
0 confirmed cases on C1179
Nothing confirmed yet for this code. No guess is offered on purpose.
Open a case