C0629Variable Effort Steering Control Module Incorrect Component Installed
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- C0629 flags a mismatch between what the variable effort steering module expects and what is fitted. Variable-effort gears exist in versions that cannot be swapped blindly: replacement racks come with or without the EVO solenoid, and GM's second Magnasteer generation dropped the permanent magnet and only raises effort with speed, whereas the first one reverses coil current around 45 mph. A Steering Solutions patent shows why this matters: the current's direction decides whether effort goes up or down. A module that detects the wrong part, wrong position or wrong variant blocks its function, much like Mitsubishi's brake unit flags a wheel sensor fitted in the wrong place within 3 s. No maker publishes C0629. It usually follows a gear or module swap.
- What you may notice
- Variable assist inactive after a steering or module repair
- Steering effort behaves the wrong way round, heavy when slow
- Steering warning on some vehicles
- Likely causes
- LikelyReplacement steering gear of the wrong variant, for example without actuator
- PossibleModule from another vehicle or not configured for this equipment
- RareActuator connected with reversed polarity after a repair
- Repair
- Hard · Usually a job for a workshop.Typical cost: €50 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.