P0526
Fan Speed Sensor Circuit
A general circuit fault on the cooling fan tachometer feedback - the ECU loses fan speed information needed to verify cooling capacity and detect a stalled or runaway fan.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: easy
Common causes
Ordered by how often each turns out to be the cause.
- Open in sensor or wiringCommon
Parts involved
- Fan Speed Sensor
P0526 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.