P0495
Fan Speed High
DTC P0495, sometimes indicated as P049500 is an OBD diagnostic trouble code indicating a generic fault with the vehicle powertrain (i.e. engine and gearbox). This code identifies an error with the auxiliary emissions system causing fan speed high.
A P0495 diagnostic code means that the engine control module (ECM) has detected that the fan speed is high. This code may be caused by a fan motor that is running too fast, a fan relay that is stuck open, or a wiring problem.
If the fan speed is high, it may be due to a problem with the fan motor or relay. It may also be caused by a wiring problem, such as a short circuit or open circuit.
If the code is caused by a fan motor or relay problem, the best solution is to replace the defective part. If the code is caused by a wiring problem, the best solution is to fix the wiring problem.
- P0495: Fan Speed High
- P0495: Engine coolant blower motor speed – high
- P0495 00: Engine coolant blower motor speed - high
Bulletins are notices put out by manufacturers in conjunction with the NHTSA to notify the public of manufacturing issues or changes.
- SSM 47999 - ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN
FORD: Some 2016-2019 f-super duty and 2016-2019 f650-750 vehicles equipped with 6.7l engine may exhibit a concern where the engine cooling fan stays on at all times or is inoperative. Diagnostic trouble codes (dtcs) P0480, P0494, P0495, P0529, p0
2003 CHEVROLET TRAILBLAZER with 35300.0 miles
Fan clutch failed in near full on mode causing excessive air flow when during winter season. After approximately 20 miles highway travel attempting to return from a vacation the "service engine soon" indicator illuminated. Readout of this error was P0495 fan speed high. *nm
ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN,
2002 CHEVROLET TRAILBLAZER with 45000.0 miles
The fan clutch on my 2002 Trailblazer have been acting up and not working properly for quite a while. From the initial startup of the vehicle , up to traveling speed of 55 mph the load jet noise, fan clutch revving can be heard. The revving up, jet noise, and lack of power from the engine and no acceleration when needed. Service engine light has come on several time P0495. Seems as though the problem has slowly got worse over the past year. Finally had to purchase a new fan clutch from automotive business and replace the part. A simple 5 minutes search of the problem on the internet showed a very eye opening response from several hundred other owners of similar Trailblazers with same exact problem. The fan clutch was replaced with a new one and the old fan clutch is still available if anyone needs to see it. The loud engine revving fan noise/like jet engine, used to happen every few days, but then it became a daily problem , hence the concern to replace the part. Bought the vehicle two years ago with 36000 miles on it and it has 56000 miles on it now. For your information of the other hundreds of owners with similar problem, here is the link. Http://www.Carsurvey.Org/reviews/Chevrolet/Trailblazer/r64655/comments/.
ENGINE AND ENGINE COOLING:COOLING SYSTEM,