P0483
Cooling Fan Rationality Check Malfunction
DTC P0483, sometimes indicated as P048300 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 cooling fan rationality check malfunction.
The cooling fan rationality check is a system that monitors the fan's operation to ensure that it is performing as intended. If the fan fails the rationality check, the system will issue a P0483 code.
There are a few possible causes of this code, including a fan that is not working properly, a wiring issue, or a problem with the fan control module.
If you have a fan that is not working properly, you will need to replace it. If there is a wiring issue, you will need to troubleshoot and fix the problem. If there is a problem with the fan control module, you will need to replace the module.
- P0483: Cooling Fan Rationality Check Malfunction
- P0483: Fan Rationality Check
- P0483: Control Fan Rationality Check Malfunction
- P0483: Engine coolant blower motor, rationality check – malfunction
- P0483 00: Engine coolant blower motor, rationality check - malfunction
- P0483 00: Cooling Fan Failure - Ratio Check
Bulletins are notices put out by manufacturers in conjunction with the NHTSA to notify the public of manufacturing issues or changes.
- 0603003 - ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL
ISUZU: Malfunction indicator lamp illuminated with engine cooling fan system performance dtc P0483 currently set or stored in history. *kb - 0501004 - ELECTRICAL SYSTEM
ISUZU: Service engine soon light on diagnostic trouble code P0483. *eh - 040604090 - ENGINE AND ENGINE COOLING:ENGINE
CHEVROLET: Service engine soon (ses) light on, diagnostic trouble code (dtc) P0483. *tt - 3079 - ELECTRICAL SYSTEM
CHEVROLET: Intermittent P0483 diagnostic trouble code. *tt - 3031 - ELECTRICAL SYSTEM
CHEVROLET: Intermittent P0483 diagnostic trouble code. *tt
2004 CHEVROLET TRAILBLAZER EXT with 53434.0 miles
On november 26 2007 took my chevy trailblazer 04 4 wheel dr. In for steering wheel shimmy. Could not duplicate. Also c.D. Changer will not eject cd's and low beams on headlights not working. Repaired headlights and c.D. Changer. Did not fix steering problem. On june 07 took in for major service with 33,000 miles. On dec.8 2008 took in for stalling when coming to a stop. Could not duplicate the problem.This is my main complaint, the stalling on jan.. 10 2009 took in for erratic speedometer which was happening for about 3 months off and on.Rebuilt the speedometer. On june 11 2009 took car in for stalling, ses lamp comes on when driving and hvac fan does not blow on the #5 position. There is alot of grinding and whining when vehicle shifts to second gear. And turning at low speeds there is a whining coming from the front end. Removed and replaced 02 sensor. For the stalling they could not verify concern. Recommended throttle body de-carb and injection system cleaning. For the #5 fan not working removed and replaced speed control resistor. Transmission they could not feel any unusual shifting.For the steering prob.Replaced power steering pump and power steering gear. Car still stalling on 6-19 -09. Took in. Did another decarb service and replace fuel filter.Still stalls. 7-01-09 when car starts there is a loud clutch fan noise like a jet taking off. Feels like the trans is overworking, veryloud not right. Fix,was fancontrol set im properly trouble code P0483 . Bulletin 05-06-02-004 reprogram pcm. Claim code1013b. July 8 took car for stalling issue july 9 took car for stalling issue july 10 took car for stalling issues no paper work for these 3 days they were trying to recreate the stalling issue. July 20 2009 in shop for 16 days for stalling issue they finally confirmed .Replaced pcm. They called in tech assistance case #10971267 he said to perform top engine cleaning. Outcome is cannot guarantee repairs at this time due to how random this prob occurs.
EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC., STEERING ELECTRICAL SYSTEM