Powertrain
generic / SAE
P0493
Fan Overspeed
Fan Overspeed: the control module has detected this fault condition.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number4 / 93
Possible causes
- Fan relay welded closed - fan runs uncontrolled high
- PWM line shorted to supply medium
- Tachometer feedback miscalibrated low
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 80–400 €
- Estimated time: 0.6–1.8 h
- Component: cooling fan
- Component: fan relay
- Component: fan speed sensor
- MIL / check engine light
Sources
References
sae:J2012