Tag
#cooling fan
3 posts in Car Diagnostics blog about "cooling fan" — OBD-II diagnostics, DTC codes, repair. ← All posts
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P0691 and P0692: cooling fan 1 control circuit low and high
On a variable-speed fan there is no relay to swap. The control is a module and a signal, which changes both the symptoms and the diagnosis.
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P0480 and P0481: cooling fan relay control circuit
A cooling fan that does not run produces a very specific pattern: fine on the motorway, overheating in traffic. That pattern is the diagnosis.
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The cooling fan will not run: where to look
The fan is the last line of defence against overheating. How to test it in two minutes and why the fan itself is usually innocent.