Question about 2004 Buick Rendezvous
There are no other codes. I've turned off. Then back on. It clears code until AWD is needed again.
Your rear flow vakve, just in front of the rear differential is bad.
Posted on Dec 10, 2014
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Posted on Jan 02, 2017
SOURCE: AWD Light stays on
3rd dealer stated that the problem was in the differential pump valve, when the temperture sensor was giving a false reading and disconnecting the rear wheel drive. Replaced with GM Part 88896067, and it solved the problem. Mechanic stated that if it is ONLY the AWD light, then this is usually the problem. If the ABS Disable light also goes on, then it is the harness on the wheel sensor.
Posted on Jul 29, 2009
SOURCE: my anti-lock brakes keep kicking
are awd light came on a few day ago...no change in the driving behavior. just had two wheel bearings replace last year. any idea what the awd disable light means now?
Posted on Aug 18, 2008
this is a dealership fix.but FIRST check fuse to AWD.if all is good problem could be in transfer case shift control module or problem could be in speed sensors or shift motor.the dealership has diagnostic equipment to check it out and fix it.
Posted on Dec 13, 2009
Testimonial: "Thanks, I'll check these suggestions."
The most common cause for this problem that I see is a failed rear "Differential oil flow valve". You would need someone to hook up to the vehicle with a scan tool and retrieve the service code to know for sure but the valve is usually the culprit in most cases. There may be a code that says something like "rear axle over temp condition" and this relates to the valve problem. There are other things that can cause the AWD light to come on so it's always good to check first before replacing parts as the valve is fairly expensive. Good luck, hope this helps!
Posted on Sep 04, 2010
Testimonial: "Thanks for your help. You confirmed the advice I received from my "shade tree" mechanic. the 2002 Buick Rendezvous has many problems."
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The AWD data list can be used to assist in determining which type of fault is causing the AWD Disabled Lamp to illuminate. with a scan tool, verify the above data displays are within specification.
AWD temperature disables can be caused by an open circuit.
Using a scan tool, select the Body - Instrument Panel Cluster - Special Functions - Lamp Test mode. In the Lamp Test mode you can turn on or off the instrument panel indicators. All indicators will turn ON when commanded on and OFF when commanded off. The AWD DISABLE indicator should turn on or off as commanded.
If the AWD DISABLE indicator is always ON or always OFF, replace the instrument cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gages and Console.
The AWD disable lamp illuminates when one of the following conditions exists for 5 seconds:
The PCM commands the solenoid ON and the voltage feedback remains high, B+.
The PCM commands the solenoid OFF and the voltage feedback remains low, 0 volts. This condition is present for 3 key cycles.
The PCM detects fluid temp is too high.
You need to have this hooked-up to a professional grade scan tool.
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