C3902 Saturn Auto Trouble Code
Parts or components should not be replaced with reference to only a C3902 Saturn DTC. The vehicle service manual should be consulted for more information on possible causes of the fault, along with required testing.
The problem is caused by the variable cylinder management system switching on and off during light throttle conditions, at cruising speeds, or when driving on flat roads. The constant switching causes excessive oil consumption and the trouble codes appear when oil pressure drops to the point where it can no longer operate the VCM system.
C3902 Saturn Possible Solution:
Air Conditioning Pressure Sensor (ACP) Insufficient Pressure Change Each time the A/C clutch engages, the PCM is looking for a pressure change in the refrigerant. If the change in pressure is outside of the calibration the DTC will set. A/C system mechanical failure Open ACP or VREF circuit A/C sensor damaged A/C system electrical failure A/C clutch always engaged Verify A/C system function, including refrigerant charge.
C3902 Saturn Description For All Models :
- Saturn Astra
- Saturn Aura
- Saturn Curve
- Saturn Ion
- Saturn L
- Saturn Ls
- Saturn Lw
- Saturn Outlook
- Saturn Relay
- Saturn Sc
- Saturn Sedan
- Saturn Sky
- Saturn Sl
- Saturn Sl1
- Saturn Sports
- Saturn Vue
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C3902 Saturn Trouble Repair :
The C3902 Saturn check engine lamp is perhaps the most troubling of lights because it could mean so many different things, from you didn't screw the gas cap on tightly enough to look out for pistons flying through the hood and into the stratosphere. The easiest way to find out what this light is telling you is to hook your vehicle up to a scan tool. OBD 2 diagnostic tool looks a little like an oversized calculator and plugs into a communication port inside the car. After you instruct it to perform the scan, it speaks with your car's computers to find out exactly what's prompting the light to turn on. |
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