Question about 2005 Acura RL

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Code 77-02 - Vehicle Stability Assist Controller Area Network Communication Vehicle Stability Assist Electronic Control Unit Malfunction

Where do I start to figure out this issue / error? VSC and SH-AWD lights come on intermittently.

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Posted on Jan 02, 2017

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SOURCE: i have a 2005 rl

First thing you have to make sure that the cooling fan are working,not the a/c fan. Make sure all the hoses are the same temp. If not the thermostat most likely it my be the water pump

Posted on Oct 12, 2010

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If the check engine light is on it will usually disable the traction and VSC as a safety feature built into the vehicles computer program. Have the codes scanned to determine what the computer has stored in its memory as a fault resulting in these lights to be illuminated and repair as necessary. Sometimes it may be an intermittant issue causing this problem and just clearing the codes will reset all the lights and continue driving to see if the problem re-occurs. If it does, have the vehicle serviced for the problem

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The SH AWD uses electromagnetic clutch in the back drive axle to change the power distribution to the rear wheels. It would have nothing to do with the P0171 error. What TPMS valve stem was bad? Because this could be a clue to what the problem is. If a rear tire is having issues it could cause the sensor to make adjustments to the system to compensate for the tire. The person that changed the TPMS might have also caused the issue when they worked on the tires.

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I was driving my 2007 acura rdx when I noticed the sh-awd light on. I then saw the check engine light on. Later when I turned my car on again the check engine light was still on, not the sh-awd light.


That is just a story of some of your vehicles history

There is no real question there or any details to work with,
other than you know your have several OBD Fault Codes
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