P0527
Fan Speed Sensor Circuit Range or Performance
Same as P0526 with the signal in plausible range yet not matching the commanded fan speed - typically sensor drift, weak magnet, or partial reluctor damage.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: easy
Common causes
Ordered by how often each turns out to be the cause.
- Sensor signal driftedCommon
Parts involved
- Fan Speed Sensor
P0527 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.