Indicates Lean lean at the end of a test, the system is trying to correct for an over-lean condition. The code is set when the fuel control system no longer detects switching for a calibrated amount of time.
Possible Causes: See Possible Causes for DTC P1130
P1130 - Lack of HO2S-11 Switch Fuel Trim at Limit
The HEGO Sensor is monitored for Fuel Trim at Limit switching. The code will set when the HO2S fails to switch due to circuit or fuel at or exceeding a HO2Scalibrated limit.
•Short to VPWR or VREF in harness or circuit or fuel at or exceeding a HO2S calibrated limit.
•HO2S circuit shorted to Ground
•Water in harness connector
•Corrosion or poor mating terminals and
•Damaged PCM (other DTCs should be
•Excessive fuel pressure (stuck fuel
pressure regulator, restricted fuel return
•Leaking/contaminated fuel injectors or fuel
•Low fuel pressure or running out of fuel
(fuel pump concern, fuel supply line
restrictions, low fuel level, etc.)
•Vapor recovery system (stuck VMV, etc.)
•Air leaks between MAF and throttle plate
•PCV system / Other vacuum leaks
•Improperly seated engine oil dipstick
•Stuck EGR valve / Leaking diaphragm or
•Incorrect cylinder compression
•Exhaust leaks before or near the HO2S
•Secondary air stuck on