Question about 2002 GMC Envoy XL
P0136 - O2 sensor malfunction, Bank 1 sensor 2." Drivers side exhaust down pipe after the Catalytic converter O2 sensor needs to be replaced."
P0606 - Control Module Internal Performance " Internal PCM failure." Replace the PCM.
For Electronic Throttle Control applications, an internal PCM failure, or an ETC system FMEM condition exists. Repairing the other DTCs can fix the P0606.
Good luck and hope this helps, keep me posted. Be glad to know you got your GMC running 100% again.
Posted on Nov 13, 2009
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Posted on Jan 02, 2017
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