The PCM sets DTC P0272 when the Engine Control Module (PCM) detects that the acceleration rate of the crankshaft for Cylinder 3 was less than a calibrated amount. During normal conditions the PCM turns the Fuel Injectors ON and OFF in the Fuel Injection System.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Air fuel ratio out of range | 1. Dirty Fuel Injector 3 2. Faulty Fuel Injector 3 3. Plugged Fuel Injector 3 4. Fuel Injector 3 harness is open or shorted 5. Fuel Injector 3 circuit poor electrical connection |
Enable Conditions |
•
ECT(Engine Coolant Temperature) more than 70℃(158°F)and under 105℃(221°F)
•
Catalyst temperature more than 500℃(932°F)and under 900℃(1652°F)
•
Engine speed more than 1520rpm and under 3000rpm
•
Engine load more than 30% and under 60%
•
BARO more than 55kPa(0.55bar/7.9psi)
•
Engaged gear more than 3
•
Closed loop fuel control On
•
Time after engine start over 0sec
•
Rough road detection No
•
Gear change No
•
Circuit Monitoring of Upstream O2S Complete | |
Threshold value |
•
4 Cylinder A/F deviation is more than 10% or under -10% | |
Diagnosis Time |
•
2 sets of lean shift test cycles in cylinder while maintaining global Lambda=1 | |
MIL On Condition |
•
2 driving cycles |
