P1124 P1126 Codes

[thstone]

These codes mean that the ECU has continued to enrich (add fuel) the air/fuel mix to the maximum extent possible to compensate for a lean condition (more air than fuel is sensed by the O2 sensors as compared to what the MAF is sensing).

So my bet is that you have an air or vacuum leak somewhere.

I think that Paul is right - a possible leak in the exhaust manifold could be sensed by the downstream O2 sensor as additional air coming from the combustion chamber and be interpreted by the ECU as a lean running condition.

I'd suggest repairing the potential exhaust manifold leak but also checking for air or vacuum leaks on the intake side.

[rule1]

My buddy said yesterday he was in first gear and it kinda started revving up on its own..Any ideas what that could be? Also said no CEL in 2 days.. Then today the same P1124 and P1126 when it was idling. Still running great though.