PACCAR MX (2004 Emissions) Fault Code: P1497 EGR Valve Position – Incorrect
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: P1498 EGR Valve Position – Incorrect
SET CONDITIONS:
The PCI ECU (D420) detects that the actual position of the EGR valve deviates too much from the requested position for more than 2 seconds.
DIAGNOSTIC CONDITION:
This diagnostic runs continuously while the engine is running, except when the engine is running in Engine mode ‘SCR Heating’.
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:
Bent connection rod between the valve and the actuator motor
Stuck EGR valve due to:
1. Contamination on the mechanism
2. Expansion/contraction of the valve housing due to sudden temperature differences (temporary situation)
PACCAR MX (2004 Emissions) Fault Code: P1501 Vehicle Speed Sensor – Current Too Low or Open Circuit on ECU (D420) Pin (B40)
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: P1502 Vehicle Speed Sensor – Data Erratic, Intermittent or Incorrect
SET CONDITIONS:
The PCI ECU (D420) detects that the vehicle speed signal is incorrect.
DIAGNOSTIC CONDITION:
This diagnostic runs when the vehicle is moving.
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. Vehicle speed sensor
2. Vehicle speed sensor wiring
3. Vehicle speed sensor pulse wheel
ADDITIONAL INFORMATION:
1. The PCI ECU receives the vehicle speed signal from the vehicle speed sensor.
2. The vehicle speed signal is a PWM (Pulse Width Modulation) signal.
3. The vehicle speed sensor is an OEM part.
PACCAR MX (2004 Emissions) Fault Code: P1503 Vehicle Speed Sensor – Voltage Too High or Short Circuit to Supply on ECU (D420) Pin (B40)
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
PACCAR MX (2004 Emissions) Fault Code: P1504 Vehicle Speed Sensor – Data Erratic, Intermittent or Incorrect
SET CONDITIONS:
The PCI ECU (D420) detects that the vehicle speed signal is incorrect.
DIAGNOSTIC CONDITION:
This diagnostic runs when the vehicle is moving.
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. Vehicle speed sensor
2. Vehicle speed sensor wiring
3. Vehicle speed sensor pulse wheel
ADDITIONAL INFORMATION:
1. The PCI ECU receives the vehicle speed signal from the vehicle speed sensor.
2. The vehicle speed signal is a PWM (Pulse Width Modulation) signal.
3. The vehicle speed sensor is an OEM part.
PACCAR MX (2004 Emissions) Fault Code: P1505 Vehicle Speed Sensor – Frequency Out of Range
SET CONDITIONS:
The PCI ECU (D420) detects that the frequency of the vehicle speed signal is above 1500 Hz.
DIAGNOSTIC CONDITION:
This diagnostic runs when the vehicle is moving.
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. Vehicle speed sensor
2. Vehicle speed sensor wiring
3. Vehicle speed sensor pulse wheel
ADDITIONAL INFORMATION:
1. The PCI ECU receives the vehicle speed signal from the vehicle speed sensor.
2. The vehicle speed signal is a PWM (Pulse Width Modulation) signal.
3. The vehicle speed sensor is an OEM part.
PACCAR MX (2004 Emissions) Fault Code: P150F Engine Oil Level – Data Valid but Too Low, Moderately Severe
SET CONDITIONS:
The PCI ECU (D420) detects that the oil level is low.
DIAGNOSTIC CONDITION:
This diagnostic runs:
1. When the ignition is keyed on and
2. 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 yellow 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: P1514 Aftertreatment System – DEF Dosing Malfunction Detected
SET CONDITIONS:
This DTC becomes active if the DTC from which it originates has been active for a certain time.
RESET CONDITION:
This DTC becomes inactive as soon as the DTC from which it originates has become inactive.
ADDITIONAL INFORMATION:
IMPORTANT: Do not troubleshoot this DTC since it originates from another active DTC.
1. This DTC only activates a warning for the driver.
2. This DTC becomes active simultaneously with an active DEF dosing system related DTC.
PACCAR MX (2004 Emissions) Fault Code: P1516 Aftertreatment System – Malfunction Detected
SET CONDITIONS:
This DTC becomes active if the DTC from which it originates has been active for a certain time.
RESET CONDITION:
This DTC becomes inactive as soon as the DTC from which it originates has become inactive.
ADDITIONAL INFORMATION:
IMPORTANT: Do not troubleshoot this DTC since it originates from another active DTC.
1. This DTC only activates a warning for the driver.
2. This DTC becomes active simultaneously with an active aftertreatment system related DTC