The powertrain control module uses a calibrated resistor internally in the injection pump to determine fuel rates. The resistor value is stored in the PCM memory. If the PCM memory has been disturbed or replaced, the PCM will relearn the resistor value on the next ignition cycle. The code is set when the key ON or engine is running and the PCM does not detect a correct current valid resistor value, or it determines that it was unable to read the current resistor value.
Powertrain control module is unable to read resistor valueThe P1219 code is set when there is a problem with the circuit from the powertrain control module to the injector driver module.Injector driver module harness is open or shortedCode series throttle control system malfunctionThe throttle position sensor is mounted on the throttle body of the throttle actuator control assembly. The sensor is actually two individual throttle position sensors within one housing.
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