2001 Chevrolet Monte Carlo Q&A

2001 Chevrolet Monte Carlo Question: check engine light on;codePO138 set

replaced:O2 sensors,spark plugs,wires,intake manifold gasket and head gasket inless than a month;code returns & light comes back on. what now? -
Answer 1
i hope this was not for that code. a lot of replacing. 138 indicates rich condition. could be a fuel pressure regulator, mass air flow or coolant sensor. i think you may need a second opinion from a shop to track it down and help you. Roy -