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P0528

Fan Speed Sensor Circuit No Signal

Same as P0526 with no detectable signal at all - sensor not producing pulses despite the fan being commanded on.

  • Check engine light: Yes
  • Emissions related: No
  • Repair difficulty: easy

Common causes

Ordered by how often each turns out to be the cause.

  • Sensor dead or magnet demagnetisedCommon

Parts involved

  • Fan Speed Sensor

P0528 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.