C062BVariable Effort Steering Module Temperature Too Low
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- C062B is set when the module or its coil driver reads a temperature below the range it is designed for. Automotive driver chips such as TI's DRV8873-Q1 are specified down to an ambient of −40 °C, so a lower reading means either an extreme cold soak or a measurement that has failed. Cold also changes the steering itself: the GM patent on temperature compensation for magnetic variable effort steering points to thicker fluid and changed electrical and magnetic behaviour, and corrects the coil current with tables tested at different temperatures, either from a fluid temperature sensor or from the current deviation. Outside its table the module cannot compensate and suspends variable effort. No maker publishes C062B. Unlike C062A, warming up usually clears it.
- What you may notice
- Variable effort inactive after a cold start
- Heavy or uneven steering until the system warms up
- Likely causes
- PossibleVehicle parked for a long time in severe frost
- PossibleOpen or failed temperature measurement inside the module or at the fluid sensor
- RareMoisture or corrosion at the connector distorting the reading
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.