Based on information from various sensors, the PCM measures the fuel injection amount. The fuel injector is a solenoid-operated valve and the fuel injection amount is controlled by length of time the fuel injector is held open. The PCM controls each injector by grounding the control circuit. When the PCM energizes the injector by grounding the control circuit, the circuit voltage should be low (theoretically 0V) and the fuel is injected. When the PCM de-energizes the injector by opening the control circuit, the fuel injector is closed and circuit voltage should momentarily peak.
PCM sets DTC P0267 if the PCM detects that injector (Cylinder #3) control circuit is shorted to ground.
Item
Detecting Condition
Possible Cause
DTC Strategy
Electrical Check
Open in power supply harness
Short to ground in control harness
Poor connection or damaged harness
Faulty injector
Enable Conditions
10V < Battery voltage <16V
Engine speed(rpm) >320
Threshold Value
Open or short to Ground in control circuit
Diagnostic Time
1.5sec.
Mil On Condition
2 Drive Cycles
Temp.(?)
Resistance (O)
20
68
13.8~15.2