Cooling Fan Speed High
Table of contents
P0495 ISUZU Possible Causes
- Faulty Cooling Fan Relay
- Cooling Fan Relay harness is open or shorted
- Cooling Fan Relay circuit poor electrical connection
- Faulty cooling fan clutch
- Faulty control unit
How do I fix code P0495 ISUZU?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the P0495 ISUZU code
The cost of diagnosing the P0495 ISUZU code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P0495 ISUZU Description
The Cooling Fan Relay sends a Pulse Width Modulation (PWM) signal (12-14 volts) to the cooling fan by the cooling fan clutch supply voltage circuit. The Powertrain Control Module (PCM) uses the PWM signal, which controls the speed of the cooling fan clutch by controlling the position of the oil control valve inside the clutch. If the cooling fan clutch RPM is to high when the PCM is commanding 0%, the Diagnostic Trouble Code (DTC) will set.