Possible causes
– Fuel delivery system
– Engine Coolant Temperature (ECT) sensor or wiring connectors
– MAP sensor or wiring connectors
– O2 sensor wiring or connectors
– Engine mechanical system
– Engine Coolant Temperature (ECT) sensor or wiring connectors
– MAP sensor or wiring connectors
– O2 sensor wiring or connectors
– Engine mechanical system
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P1129 DODGE Description
The Powertrain Control Module (PCM) detects a condition where the vehicle has remained in open loop fuel control ,from a start-up condition ,longer than a calibrated amount of time ,when conditions would have otherwise closed loop operation.