GMC Troubleshooting Questions? Ask a Mechanic for Answers
Hi, I’m Cary and I’ll be helping you today.Please understand that I can't smell, hear, or touch the vehicle, so patience is appreciated. Before leaving the site make sure and leave me a rating. You can still reply to me as many times as needed, even after the rating..
Which code are you getting?
Bank 2 is the drivers side.
Is it P0390?
If it is P0390. Sensor B, Bank 2 is the front bank of the engine. Here is a diagram.
It would be #4 in the diagram.
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Good. That is what I thought.
P0390 and P0391 are codes for the same sensor. One is for an open circuit and the is for a shorted circuit.
Either way it would be the same sensor. #4 in the diagram.
Yes and thank you.
Is there anything else I can help you with?