Brian425 said:I pulled the code and the only code is P0138. The question now is which O2 sensor is bad.
Sharperover said:Those codes don't positively mean that the 02's are bad. They are simply reading that the input (before the cat) and output (after the cat) are reading something out of the ordinary in terms of output. What they measure determines whether the ECU richens or leans the engine. You may have a vacuum leak or any number of other issues. A code points to the symptom, not necessarily the cause.