Paccar

PACCAR MX (2004 Emissions) Fault Code: P1163 CAN Communication – Message (TC01) Out of Range, Vehicle Speed from Transmission System

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: P1167 Fuel Temperature – Data Valid but Too High, Least Severe

SET CONDITIONS:
The PCI ECU (D420) detects that the fuel temperature is above 92?C [198?F] for more than 300 seconds.

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

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. Restriction in the fuel to tank return circuit or faulty fuel pressure regulating valve.
2. Excessive dumping of fuel from the common rail through common rail pressure release valve (L094).

ADDITIONAL INFORMATION:
The low-pressure fuel temperature is measured by the fuel temperature sensor (F803).

PACCAR MX (2004 Emissions) Fault Code: P1168 Fuel Temperature – Data Valid but Too High, Moderately Severe

SET CONDITIONS:
The PCI ECU (D420) detects that the fuel temperature is above 95?C [203?F] for more than 300 seconds.

DIAGNOSTIC CONDITION:
This diagnostic runs when the engine has been running for more than 200 seconds.

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. Restriction in the fuel to tank return circuit or faulty fuel pressure regulating valve.
2. Excessive dumping of fuel from the common rail through common rail pressure release valve (L094).

ADDITIONAL INFORMATION:
1. The low-pressure fuel temperature is measured by the fuel temperature sensor (F803).
2. Engine torque is reduced when this DTC is active.

PACCAR MX (2004 Emissions) Fault Code: P1180 Fuel Temperature – Data Valid but Too High, Moderately Severe

SET CONDITIONS:
The PCI ECU (D420) detects that:
1. Fuel temperature is more than 95?C [203?F] and
2. Fuel pressure is too low and
3. Ambient temperature is more than 45?C [113?F] and
4. Fuel tank level is low

DIAGNOSTIC CONDITION:
This diagnostic runs continuously when the engine is running.

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:
Fuel is hot due to low fuel tank level and high ambient temperatures.

ADDITIONAL INFORMATION:
1. The low-pressure fuel pressure is measured by the fuel pressure sensor (F801).
2. The low-pressure fuel temperature is measured by the fuel temperature sensor (F803).
3. Engine torque is reduced.

PACCAR MX (2004 Emissions) Fault Code: P1191 Fuel Filter – Clogged

SET CONDITIONS:
The PCI ECU (D420) detects that:
1. Fuel temperature is more than 95?C [203?F] and
2. Fuel pressure is too low

DIAGNOSTIC CONDITION:
This diagnostic runs continuously when the engine is running.

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:
Clogged fuel filter

ADDITIONAL INFORMATION:
1. The low-pressure fuel pressure is measured by the fuel pressure sensor (F801).
2. The low-pressure fuel temperature is measured by the fuel temperature sensor (F803).

PACCAR MX (2004 Emissions) Fault Code: P1194 Fuel Filter – Very Clogged

SET CONDITIONS:
The PCI ECU (D420) detects that:
1. Fuel temperature is more than 95?C [203?F] and
2. Fuel pressure is too low

DIAGNOSTIC CONDITION:
This diagnostic runs continuously when the engine is running.

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:
Very clogged fuel filter

ADDITIONAL INFORMATION:
1. The low-pressure fuel pressure is measured by the fuel pressure sensor (F801).
2. The low-pressure fuel temperature is measured by the fuel temperature sensor (F803).
3. Engine torque is reduced.

PACCAR MX (2004 Emissions) Fault Code: P1195 Common Rail Fuel Pressure – Data Erratic, Intermittent or Incorrect, at Ignition On

SET CONDITIONS:
The PCI ECU (D420) detects that the actual rail pressure is more than 245 bar [3553 psi].

DIAGNOSTIC CONDITION:
This diagnostic runs when:
1. The engine is not running and
2. The ignition is keyed on after it has been off for more than 200 seconds and
3. Fuel temperature is lower than the fuel temperature at the previous ignition switch off event.

CORRESPONDING OBD READINESS MONITOR:
Comprehensive components monitor

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 following conditions:
– Corresponding readiness monitor displays ‘Ready’
– Diagnostic conditions are met
– Set conditions are met
3. Did the DTC come back? (Can be pending, inactive or active)
– No, repair successful
– Yes, repair unsuccessful

POSSIBLE CAUSES:
Common rail pressure sensor deviation

ADDITIONAL INFORMATION:
1. For this diagnostic, the actual rail pressure is monitored when the engine is not running.

2. The rail pressure is measured in the common rail by the common rail pressure sensor (F854).

3. When this DTC is active:
– The engine torque is reduced.
– The engine runs in protection mode.
– The engine runs in rail pressure control state: Release valve only.
– The maximum rail pressure is limited to 1300 bar.

PACCAR MX (2004 Emissions) Fault Code: P1196 Common Rail Fuel Pressure – Data Erratic, Intermittent or Incorrect, at Ignition On

SET CONDITIONS:
The PCI ECU (D420) detects that the actual rail pressure drop is less than 140 bar [2030 PSI] since the last ignition switch off event.

DIAGNOSTIC CONDITION:
This diagnostic runs when:
1. The engine is not running and
2. The ignition is keyed on after it has been off for more than 200 seconds and
3. Fuel temperature is lower than the fuel temperature at the previous ignition switch off event

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

POSSIBLE CAUSES:
Common rail pressure sensor deviation

ADDITIONAL INFORMATION:
1. For this diagnostic, the actual rail pressure is monitored when the engine is not running.

2. The rail pressure is measured in the common rail by the common rail pressure sensor (F854).

3. When this DTC is active:
– The engine torque is reduced.
– The engine runs in protection mode.
– The engine runs in rail pressure control state: Release valve only.
– The maximum rail pressure is limited to 1300 bar.

PACCAR MX (2004 Emissions) Fault Code: P1201 Injector Solenoid Valve Cylinder 1 – Current Too Low or Open Circuit on ECU (D420) Pin and or Pin (A2)

SET CONDITIONS:
The PCI ECU (D420) detects no or a too low current in the electrical circuit of the injector.

DIAGNOSTIC CONDITION:
This diagnostic runs when the engine is running.

CORRESPONDING OBD READINESS MONITOR:
None

RESET CONDITION:
1. This DTC changes to inactive when the fault is no longer detected.
2. To enable the injector output, the ignition must be shut off for more the 15 seconds and turned on again.

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. Open circuit in the wiring of the wiring loom frame (valve cover)
2. Faulty injector
3. Engine wiring harness

ADDITIONAL INFORMATION:
The injector output is disabled by the PCI ECU when this DTC is detected.