Paccar

PACCAR MX (2004 Emissions) Fault Code: P250D Engine Oil Level – Open Circuit on ECU (D420) Pin (B35)

CORRESPONDING OBD READINESS MONITOR:
None

REPAIR VERIFICATION:
1. Clear all DTCs.
2. Test drive or operate the vehicle to meet the diagnostic conditions and set conditions.
3. Did the DTC come back?
– No, repair successful
– Yes, repair unsuccessful

PACCAR MX (2004 Emissions) Fault Code: P250E Engine Oil Level – Unlikely, Difference Too High

SET CONDITIONS:
The PCI ECU (D420) detects that the oil level has dropped too much between two measurements.

DIAGNOSTIC CONDITION:
This diagnostic runs when the ignition is keyed on and when the oil level stabilization time has elapsed.

CORRESPONDING OBD READINESS MONITOR:
None

RESET CONDITION:
This DTC changes to inactive when the fault is no longer detected.

REPAIR VERIFICATION:
1. Clear all DTCs.
2. Test drive or operate the vehicle to meet the diagnostic conditions and set conditions.
3. Did the DTC come back?
– No, repair successful
– Yes, repair unsuccessful

POSSIBLE CAUSES:
External oil leakage of the engine. After repair, refill the oil level.

ADDITIONAL INFORMATION:
1. The oil level is measured in the oil sump by the oil level sensor (F673).
2. The engine oil temperature is measured by the oil temperature sensor (F808).
3. The oil level can be checked with the mechanical dipstick or on the master display.

PACCAR MX (2004 Emissions) Fault Code: P250F Engine Oil Level – Data Valid but Too Low, Most Severe

SET CONDITIONS:
The PCI ECU (D420) detects that the oil level is very low.

DIAGNOSTIC CONDITION:
This diagnostic runs when the ignition is keyed on and when the oil level stabilization time has elapsed.

CORRESPONDING OBD READINESS MONITOR:
None

RESET CONDITION:
This DTC changes to inactive when the fault is no longer detected.

REPAIR VERIFICATION:
1. Clear all DTCs.
2. Test drive or operate the vehicle to meet the diagnostic conditions and set conditions.
3. Did the DTC come back?
– No, repair successful
– Yes, repair unsuccessful

POSSIBLE CAUSES:
Oil level too low

ADDITIONAL INFORMATION:
1. The oil level is measured in the oil sump by the oil level sensor (F673).
2. The engine oil temperature is measured by the oil temperature sensor (F808).
3. The driver is informed by a red warning on DIP.
4. The oil level can be checked with the mechanical dipstick or on the master display.

PACCAR MX (2004 Emissions) Fault Code: P252F Engine Oil Level – Data Valid but Too High, Moderately Severe

SET CONDITIONS:
The PCI ECU (D420) detects that the oil level is too high.

DIAGNOSTIC CONDITION:
This diagnostic runs when the ignition is keyed on and when the oil level stabilization time has elapsed.

CORRESPONDING OBD READINESS MONITOR:
None

RESET CONDITION:
This DTC changes to inactive when the fault is no longer detected.

REPAIR VERIFICATION:
1. Clear all DTCs.
2. Test drive or operate the vehicle to meet the diagnostic conditions and set conditions.
3. Did the DTC come back?
– No, repair successful
– Yes, repair unsuccessful

POSSIBLE CAUSES:
1. Oil overfill
2. Diluted lubrication oil as a result of fuel system leakage

ADDITIONAL INFORMATION:
1. The oil level is measured in the oil sump by the oil level sensor (F673).
2. The engine oil temperature is measured by the oil temperature sensor (F808).
3. The driver is informed by a yellow warning on DIP.
4. The oil level can be checked with the mechanical dipstick or on the master display.

Actual engine oil level check on the master display:
1. The ignition is keyed on and the engine is not started.
2. Look up the oil level check on the master display.

The actual oil level on the master display is only displayed when the waiting time (ignition off) has elapsed with the associated oil temperature reached at the last engine stop, and

WAITING TIME TABLE 1:
1. Oil Temperature: Below -5°C [23°F]
Waiting Time (Minutes): No measurement possible
2. Oil Temperature: -5°C [23°F]
Waiting Time (Minutes): 120
3. Oil Temperature: 0°C [32°F]
Waiting Time (Minutes): 120
4. Oil Temperature: 40°C [104°F]
Waiting Time (Minutes): 80
5. Oil Temperature: 60°C [140°F]
Waiting Time (Minutes): 30
6. Oil Temperature: Above 80°C [176°F]
Waiting Time (Minutes): 15

WAITING TIME TABLE 2:
1. Oil Temperature: Below -5°C [23°F]
Waiting Time (Minutes): No measurement possible
2. Oil Temperature: -5°C [23°F]
Waiting Time (Minutes): 120
3. Oil Temperature: 0°C [32°F]
Waiting Time (Minutes): 120
4. Oil Temperature: 40°C [104°F]
Waiting Time (Minutes): 30
5. Oil Temperature: 60°C [140°F]
Waiting Time (Minutes): 20
6. Oil Temperature: Above 80°C [176°F]
Waiting Time (Minutes): 15

IMPORTANT: If the above conditions are not met, the actual oil level is not displayed. A message appears on the display indicating that the oil level cannot be measured. In this case, the last successful oil level check with the corresponding mileage is shown.

PACCAR MX (2004 Emissions) Fault Code: P253B CAN Communication – Message (PTO) Out of Range, Engine PTO Governor Set Switch

SET CONDITIONS:
This DTC is set when a CAN message is received correctly but the content (signal value or status) is out of the expected range.

DIAGNOSTIC CONDITION:
The diagnostic runs continuously when the ignition is keyed on or when the engine is running.

CORRESPONDING OBD READINESS MONITOR:
None

RESET CONDITION:
The DTC changes to inactive after the diagnostic runs and passes.

REPAIR VERIFICATION:
1. Clear all DTCs.
2. Test drive or operate the vehicle to meet the diagnostic conditions and set conditions.
3. Did the DTC come back?
– No, repair successful
– Yes, repair unsuccessful

POSSIBLE CAUSES:
1. A corrupt or empty CAN message
2. A malfunction in the system from which the message originates

ADDITIONAL INFORMATION:
1. A ‘message out of range’ DTC is activated by the receiving ECU but indicates a malfunction within another system which communicates with this ECU.
2. The cause of the DTC must be sought in the system from which it originates.

Example:
1. [ECU 1] detects an incorrect or missing signal from [sensor A].
2. [ECU 1] sets [DTC 1] (In this specific case, an open circuit DTC).
3. [ECU 1] constantly informs [ECU 2] about the status of [sensor A] via CAN messages.
4. Since the data received from the sensor is not available or not plausible, an ’empty’ CAN message is sent from [ECU 1] to [ECU 2].
5. [ECU 2] interprets the empty message as being out of the expected range and sets the ‘out of range DTC’ [DTC 2].

PACCAR MX (2004 Emissions) Fault Code: P2541 Fuel Pressure – Voltage Too Low or Short Circuit to Ground on ECU (D420) Pin (A50)

SET CONDITIONS:
This DTC is set when the ECU detects a lower voltage than expected on the signal or control circuit of the ECU.

DIAGNOSTIC CONDITION:
The diagnostic runs continuously when the ignition is keyed on.

CORRESPONDING OBD READINESS MONITOR:
None

RESET CONDITION:
The DTC changes to inactive after the diagnostic runs and passes.

REPAIR VERIFICATION:
1. Clear all DTCs.
2. Test drive or operate the vehicle to meet the diagnostic conditions and set conditions.
3. Did the DTC come back?
– No, repair successful
– yes, repair unsuccessful

POSSIBLE CAUSES:
1. The sensor or actuator signal wiring is interrupted.
2. The sensor or actuator signal wiring has a short circuit to ground.
3. A malfunction in the power supply of the sensor or actuator
4. A malfunction of the sensor or actuator

ADDITIONAL INFORMATION:
Multiple sensor related voltage-too-low DTCs can indicate a malfunction within a 5-V sensor power supply circuit of the PCI ECU.

PACCAR MX (2004 Emissions) Fault Code: P2542 Fuel Pressure – Voltage Too High or Short Circuit to Supply on ECU (D420) Pin (A50)

SET CONDITIONS:
This DTC is set when the ECU detects a higher voltage than expected on the signal or control circuit of the ECU.

DIAGNOSTIC CONDITION:
The diagnostic runs continuously when the ignition is keyed on.

CORRESPONDING OBD READINESS MONITOR:
None

RESET CONDITION:
The DTC changes to inactive after the diagnostic runs and passes.

REPAIR VERIFICATION:
1. Clear all DTCs.
2. Test drive or operate the vehicle to meet the diagnostic conditions and set conditions.
3. Did the DTC come back?
– No, repair successful
– Yes, repair unsuccessful

POSSIBLE CAUSES:
1. The sensor or actuator signal wiring has a short circuit to supply.
2. A malfunction of the sensor or actuator