Hello Scotty, I recently had four engine codes pop up and I wanted to know which code I should address first. The car currently has 150k miles on it and its an automatic. P0014 - Camshaft Position "B" - Timing Over-Advanced or System Performance P0366 - Camshaft Position Sensor "B" Circuit Range/Performance P0300 - Random/Multiple Cylinder Misfire Detected P0420 - Catalyst System Efficiency Below Threshold (Bank 1)

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2012 GMC terrain stalling

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05/01/2024 4:42 pm

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Hello Scotty, I recently had four engine codes pop up and I wanted to know which code I should address first. The car currently has 150k miles on it and its an automatic.

P0014 - Camshaft Position "B" - Timing Over-Advanced or System Performance
P0366 - Camshaft Position Sensor "B" Circuit Range/Performance
P0300 - Random/Multiple Cylinder Misfire Detected
P0420 - Catalyst System Efficiency Below Threshold (Bank 1)

OG_Loaf

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05/01/2024 4:46 pm

Fixing the camshaft sensor will likely fix the misfire.

But if the vehicle has been misfiring for a while, then the catalytic converter could be failed and needing replacement. (it will usually flash the check engine light at you as warning)