Paccar

Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe™ Online for applicable fixes to the calibration stored in the ECM. If necessary, calibrate the ECM. Use the corresponding Troubleshooting and Repair Manual for the engine being serviced.

The intake manifold 1 pressure sensor monitors pressure in the intake manifold. This fault is set active when the intake manifold pressure is too high or low for the present engine operating conditions. The ECM compares the intake manifold pressure reading to turbocharger speed to determine if the pressure reading is valid.

Possible causes:

1)A damaged intake manifold pressure sensor
2)A malfunctioning barometric pressure sensor
3)Leaks in the air intake system between the turbocharger and intake manifold
4)Restriction in the charge-air cooler
5)A malfunctioning turbocharger speed sensor
6)Plugged or restricted exhaust system
7)A plugged intake manifold pressure sensor
8)Air filter restriction.

Possible repairs:

1)Replace the barometric pressure sensor.
2)Replace the engine intake manifold pressure/temperature sensor.
3)Flush the dirt, debris, or moisture from the connector pins. Use electronic contact cleaner.
4)Install the appropriate connector seal if it is damaged or missing.
5)Repair or replace the engine harness.
6)Replace the ECM.
7)Repair or replace the leaking component.
8)Replace the turbocharger
9)Clean or replace the charge-air cooler
10)Replace the turbocharger speed sensor.
11)Repair or replace the restricted component.

Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe® Online for applicable fixes to the calibration stored in the ECM. If necessary, recalibrate the ECM.

Possible causes:

1)Signal circuit open or shorted to ground in the OEM harness or sensor
2)Supply line open or shorted to ground.

Possible repairs:

1)Replace the OEM pressure sensor.
2)Repair or replace the OEM harness.
3)Replace the ECM.

Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe™ Online for applicable fixes to the calibration stored in the ECM. If necessary, calibrate the ECM.

1)Fault activation: The ECM senses current as each injector is actuated. If the ECM detects a persistent circuit error on an injector circuit, this fault will become active. If a circuit error is determined to cause excessive current, the ECM will disable the injection event for the cylinder(s) that is faulty.
2)Fault deactivation: The ECM will attempt to enable any disabled injector circuit whenever the engine is started and approximately once per minute while the engine is running. If an injector circuit fault is active and the faulty condition is repaired, the fault will become inactive once the engine is restarted or if the engine is permitted to idle for more than 1 minute.
3)If a fault condition is intermittent and especially if more than one injector fault code is in the ECM memory, look for a wire harness that can short to components inside the rocker housing or for a short circuit to ground in the injector solenoid.
4)If more than one injector fault code is occurring and the faults occur for injector circuits in the same bank, a short circuit exists.

Causes of a single injector fault are:

1)An open circuit in the engine harness(es) or injector solenoid
2)High resistance in a single injector or injector solenoid
3)Extremely low resistance in an injector solenoid (injector shorted internally but not to ground)
4)Damaged ECM.
5)If a fault condition is intermittent and especially if more than one injector fault code is in the ECM memory, look for a wire harness that can short to components inside the rocker housing or a short circuit to ground in the injector solenoid.

Causes of multiple injector fault codes in the same bank of injectors are:

1)Short circuit in the engine harness(es) – either shorts to ground or to other wires in the engine harness
2)Short circuit in any of the three injectors in the bank – shorts to ground
3)Damaged ECM.

Possible repairs:

1)Repair or replace the engine harness.
2)Repair or replace the injector harness.
3)Repair or replace the damaged component.
4)Replace the ECM.
5)Replace injector number 1.
6)Replace injector number 2.
7)Replace injector number 3.

Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe™ Online for applicable fixes to the calibration stored in the ECM. If necessary, calibrate the ECM.

1)Fault activation: The ECM senses current as each injector is actuated. If the ECM detects a persistent circuit error on an injector circuit, this fault will become active. If a circuit error is determined to cause excessive current, the ECM will disable the injection event for the cylinder(s) that is faulty.
2)Fault deactivation: The ECM will attempt to enable any disabled injector circuit whenever the engine is started and approximately once per minute while the engine is running. If an injector circuit fault is active and the faulty condition is repaired, the fault will become inactive once the engine is restarted or if the engine is permitted to idle for more than 1 minute.
3)If a fault condition is intermittent and especially if more than one injector fault code is in the ECM memory, look for a wire harness that can short to components inside the rocker housing or for a short circuit to ground in the injector solenoid.
4)If more than one injector fault code is occurring and the faults occur for injector circuits in the same bank, a short circuit exists.

Causes of a single injector fault are:

1)An open circuit in the engine harness(es) or injector solenoid
2)High resistance in a single injector or injector solenoid
3)Extremely low resistance in an injector solenoid (injector shorted internally but not to ground)
4)Damaged ECM.
5)If a fault condition is intermittent and especially if more than one injector fault code is in the ECM memory, look for a wire harness that can short to components inside the rocker housing or a short circuit to ground in the injector solenoid.

Causes of multiple injector fault codes in the same bank of injectors are:

1)Short circuit in the engine harness(es) – either shorts to ground or to other wires in the engine harness
2)Short circuit in any of the three injectors in the bank – shorts to ground
3)Damaged ECM.

Possible repairs:

1)Repair or replace the engine harness.
2)Repair or replace the injector harness.
3)Repair or replace the damaged component.
4)Replace the ECM.
5)Replace injector number 4.
6)Replace injector number 5.
7)Replace injector number 6.

Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe™ Online for applicable fixes to the calibration stored in the ECM. If necessary, calibrate the ECM.

1)Fault activation: The ECM senses current as each injector is actuated. If the ECM detects a persistent circuit error on an injector circuit, this fault will become active. If a circuit error is determined to cause excessive current, the ECM will disable the injection event for the cylinder(s) that is faulty.
2)Fault deactivation: The ECM will attempt to enable any disabled injector circuit whenever the engine is started and approximately once per minute while the engine is running. If an injector circuit fault is active and the faulty condition is repaired, the fault will become inactive once the engine is restarted or if the engine is permitted to idle for more than 1 minute.
3)If a fault condition is intermittent and especially if more than one injector fault code is in the ECM memory, look for a wire harness that can short to components inside the rocker housing or for a short circuit to ground in the injector solenoid.
4)If more than one injector fault code is occurring and the faults occur for injector circuits in the same bank, a short circuit exists.

Causes of a single injector fault are:

1)An open circuit in the engine harness(es) or injector solenoid
2)High resistance in a single injector or injector solenoid
3)Extremely low resistance in an injector solenoid (injector shorted internally but not to ground)
4)Damaged ECM.
5)If a fault condition is intermittent and especially if more than one injector fault code is in the ECM memory, look for a wire harness that can short to components inside the rocker housing or a short circuit to ground in the injector solenoid.

Causes of multiple injector fault codes in the same bank of injectors are:

1)Short circuit in the engine harness(es) – either shorts to ground or to other wires in the engine harness
2)Short circuit in any of the three injectors in the bank – shorts to ground
3)Damaged ECM.

Possible repairs:

1)Repair or replace the engine harness.
2)Repair or replace the injector harness.
3)Repair or replace the damaged component.
4)Replace the ECM.
5)Replace injector number 1.
6)Replace injector number 2.
7)Replace injector number 3.

Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe™ Online for applicable fixes to the calibration stored in the ECM. If necessary, calibrate the ECM.

1)Fault activation: The ECM senses current as each injector is actuated. If the ECM detects a persistent circuit error on an injector circuit, this fault will become active. If a circuit error is determined to cause excessive current, the ECM will disable the injection event for the cylinder(s) that is faulty.
2)Fault deactivation: The ECM will attempt to enable any disabled injector circuit whenever the engine is started and approximately once per minute while the engine is running. If an injector circuit fault is active and the faulty condition is repaired, the fault will become inactive once the engine is restarted or if the engine is permitted to idle for more than 1 minute.
3)If a fault condition is intermittent and especially if more than one injector fault code is in the ECM memory, look for a wire harness that can short to components inside the rocker housing or for a short circuit to ground in the injector solenoid.
4)If more than one injector fault code is occurring and the faults occur for injector circuits in the same bank, a short circuit exists.

Causes of a single injector fault are:

1)An open circuit in the engine harness(es) or injector solenoid
2)High resistance in a single injector or injector solenoid
3)Extremely low resistance in an injector solenoid (injector shorted internally but not to ground)
4)Damaged ECM.
5)If a fault condition is intermittent and especially if more than one injector fault code is in the ECM memory, look for a wire harness that can short to components inside the rocker housing or a short circuit to ground in the injector solenoid.

Causes of multiple injector fault codes in the same bank of injectors are:

1)Short circuit in the engine harness(es) – either shorts to ground or to other wires in the engine harness
2)Short circuit in any of the three injectors in the bank – shorts to ground
3)Damaged ECM.

Possible repairs:

1)Repair or replace the engine harness.
2)Repair or replace the injector harness.
3)Repair or replace the damaged component.
4)Replace the ECM.
5)Replace injector number 4.
6)Replace injector number 5.
7)Replace injector number 6.

Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe™ Online for applicable fixes to the calibration stored in the ECM. If necessary, calibrate the ECM.

1)Fault activation: The ECM senses current as each injector is actuated. If the ECM detects a persistent circuit error on an injector circuit, this fault will become active. If a circuit error is determined to cause excessive current, the ECM will disable the injection event for the cylinder(s) that is faulty.
2)Fault deactivation: The ECM will attempt to enable any disabled injector circuit whenever the engine is started and approximately once per minute while the engine is running. If an injector circuit fault is active and the faulty condition is repaired, the fault will become inactive once the engine is restarted or if the engine is permitted to idle for more than 1 minute.
3)If a fault condition is intermittent and especially if more than one injector fault code is in the ECM memory, look for a wire harness that can short to components inside the rocker housing or for a short circuit to ground in the injector solenoid.
4)If more than one injector fault code is occurring and the faults occur for injector circuits in the same bank, a short circuit exists.

Causes of a single injector fault are:

1)An open circuit in the engine harness(es) or injector solenoid
2)High resistance in a single injector or injector solenoid
3)Extremely low resistance in an injector solenoid (injector shorted internally but not to ground)
4)Damaged ECM.
5)If a fault condition is intermittent and especially if more than one injector fault code is in the ECM memory, look for a wire harness that can short to components inside the rocker housing or a short circuit to ground in the injector solenoid.

Causes of multiple injector fault codes in the same bank of injectors are:

1)Short circuit in the engine harness(es) – either shorts to ground or to other wires in the engine harness
2)Short circuit in any of the three injectors in the bank – shorts to ground
3)Damaged ECM.

Possible repairs:

1)Repair or replace the engine harness.
2)Repair or replace the injector harness.
3)Repair or replace the damaged component.
4)Replace the ECM.
5)Replace injector number 1.
6)Replace injector number 2.
7)Replace injector number 3.

Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe™ Online for applicable fixes to the calibration stored in the ECM. If necessary, calibrate the ECM.

1)Fault activation: The ECM senses current as each injector is actuated. If the ECM detects a persistent circuit error on an injector circuit, this fault will become active. If a circuit error is determined to cause excessive current, the ECM will disable the injection event for the cylinder(s) that is faulty.
2)Fault deactivation: The ECM will attempt to enable any disabled injector circuit whenever the engine is started and approximately once per minute while the engine is running. If an injector circuit fault is active and the faulty condition is repaired, the fault will become inactive once the engine is restarted or if the engine is permitted to idle for more than 1 minute.
3)If a fault condition is intermittent and especially if more than one injector fault code is in the ECM memory, look for a wire harness that can short to components inside the rocker housing or for a short circuit to ground in the injector solenoid.
4)If more than one injector fault code is occurring and the faults occur for injector circuits in the same bank, a short circuit exists.

Causes of a single injector fault are:

1)An open circuit in the engine harness(es) or injector solenoid
2)High resistance in a single injector or injector solenoid
3)Extremely low resistance in an injector solenoid (injector shorted internally but not to ground)
4)Damaged ECM.
5)If a fault condition is intermittent and especially if more than one injector fault code is in the ECM memory, look for a wire harness that can short to components inside the rocker housing or a short circuit to ground in the injector solenoid.

Causes of multiple injector fault codes in the same bank of injectors are:

1)Short circuit in the engine harness(es) – either shorts to ground or to other wires in the engine harness
2)Short circuit in any of the three injectors in the bank – shorts to ground
3)Damaged ECM.

Possible repairs:

1)Repair or replace the engine harness.
2)Repair or replace the injector harness.
3)Repair or replace the damaged component.
4)Replace the ECM.
5)Replace injector number 4.
6)Replace injector number 5.
7)Replace injector number 6.

Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe® Online for applicable fixes to the calibration stored in the ECM. If necessary, recalibrate the ECM.

Two different failure modes of the engine coolant temperature sensor can trigger this fault code. Either the sensor is not reading ambient air temperature after an extended period with the engine not running or the engine coolant temperature is not changing with engine operating conditions.

Possible causes:

1)Stuck in-range engine coolant temperature sensor
2)High resistance in the engine coolant temperature sensor signal or return lines.

Possible repairs:

1)Replace the thermostat.
2)Replace the engine coolant temperature sensor.
3)Replace the ECM.
4)Repair or replace the engine harness.