C062AVariable Effort Steering Module Temperature Too High
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- The variable effort steering module, or its coil driver, reports a temperature above its permitted limit. Heat matters twice here: a GM patent on magnetic variable effort steering notes that fluid viscosity, magnet properties and coil current all drift with temperature and either fits a sensor in the fluid sump or infers temperature from the current error. A JTEKT patent warns that a continuously energised steering coil can reach about 200 °C and holds it at or below 100 °C by pulsing it. Driver chips set their own limits; TI's DRV8873-Q1 warns at a die temperature of roughly 140–160 °C and shuts down at 165–185 °C. No maker publishes C062A. The function is typically reduced or suspended until things cool down.
- What you may notice
- Variable effort reduced or switched off temporarily
- Steering feel changes after hard use and returns after cooling
- Likely causes
- PossibleVery high underhood or fluid temperature, for example after long parking manoeuvres in heat
- PossiblePartly shorted coil drawing excess current and heating the driver
- RareFaulty internal temperature measurement reporting heat that is not there
- 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.