DTCs P1131 and P1151 indicate air/fuel ratio is correcting rich for an overly lean condition. DTCs P1132 and P1152 indicate air/fuel ratio is correcting lean for an overly rich condition. DTCs P1130 and P1150 indicate fuel system has reached maximum compensation and HO2S is not switching at the adaptive limits. Possible causes are:
ï¬ Fuel system malfunction.
ï¬ EGR system malfunction.
ï¬ Air intake or vacuum system leak.
ï¬ Engine oil level too high.
ï¬ Incorrect cam timing.
ï¬ Restricted air cleaner.
ï¬ Faulty PCV system.
ï¬ Excessive internal engine wear.
Jan 29, 2009 at 8:51 PM
