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2004 gmc envoy_sle_xuv
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54 Posts
Discussion Starter · #1 ·
Hello,

Had a SES light, took it to Autozone, they told me it was a Cam Phasing Error. (he didn't give me the code)

Expanation: The ECM has detected the camshaft phase angle has exceeded it's tolerance value.

Probable cause:
1) Loose cam or crank sensor
2) Excessive timing chain free play
3) Blocked oil passage in the camshaft actuator assembly or engine
4) incorrect oil quality or viscosity

I did an oil change already and disconnected the battery for a couple min and rehooked it up and the SES came back in about 15 min of driving.

Any suggestions??

Thanks for any help!
Rob...
 

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2004 gmc
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26,181 Posts
Camshaft position sensors have been failing for other members. Run a search, and consider changing it. You might have to pay a dealer to run deeper diagnostics if you want pinpoint accuracy on any SINGLE thing that's the root cause. And even some dealers resort to guessing and shotgunning after a while.
 

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Registered
2004 gmc envoy_sle_xuv
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54 Posts
Discussion Starter · #3 ·
Will a bad cam or crank sensor effect the way the engine runs? Mine seams to run fine, but when I floor it and it's ready to shift in to 2nd gear, it make a funny deep echo sound. any ideals?
 
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