C0537Motor Control B Circuit High
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- Channel B of the motor control reads high, meaning a motor terminal is pulled toward battery voltage against the command. A pinched lead touching a live wire, moisture bridging pins in a shared connector, or a high-side switch stuck in the conducting state are the usual suspects. For the shut-down logic, the Bosch patent US5329238 distinguishes this case from a short to minus and can block drive in just one direction; TI's DRV8873-Q1 covers shorts to battery with its overcurrent monitoring, which can latch, retry or only report. C0537 appears in no public manufacturer document found, and J2012 leaves the motor unnamed. Expect the function to be off, possibly with a motor that briefly runs on; the A-side equivalent is C0532.
- What you may notice
- Warning lamp of the affected system on
- Motor B runs on briefly or the function is switched off
- Likely causes
- LikelyPinched motor B lead contacting a live wire
- PossibleMoisture between pins of a shared connector
- RareHigh-side switch for channel B not opening
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.