| DTC |
Description |
Possible cause |
Action |
| P040100 |
Exhaust Gas Recirculation A Flow Insufficient Detected |
- Exhaust gas recirculation (EGR) valve incorrectly installed or loose
- EGR pipe blocked
- EGR valve stuck closed, blocked
- EGR coolers blocked
- EGR valve failure
- MAF sensor fault
|
Refer to the relevant workshop manual section. Check the EGR
valve, coolers and pipework. Refer to the electrical guides and check the
MAF sensor and circuits. Allow the engine to warm up, switch off and turn
the ignition on. Using a data logger function, check the EGR valve angle.
Command the valve actuator to 0% then 100% pulse width modulated (PWM) and
recheck the values. The angle should range between 5% and 95%. If this is
not the case, install a new valve as necessary. Clear the DTCs and test
for normal operation. |
| P040200 |
Exhaust Gas Recirculation A Flow Excessive Detected |
- Exhaust gas recirculation (EGR) valve incorrectly installed or loose
- EGR pipe blocked
- EGR valve stuck/sticking
- EGR coolers blocked
- EGR valve circuit high resistance
- EGR valve circuit short circuit to ground
- EGR valve circuit short circuit to power
- EGR valve failure
- MAF sensor fault
|
Refer to the relevant workshop manual section. Check the EGR
valve, coolers and pipework. Refer to the electrical guides and check the
MAF sensor and circuits. Allow the engine to warm up, switch off and turn
the ignition on. Using a data logger function, check the EGR valve angle.
Command the valve actuator to 0% then 100% pulse width modulated (PWM) and
recheck the values. The angle should range between 5% and 95%. If this is
not the case, install a new valve as necessary. Clear the DTCs and test
for normal operation. |
| P040300 |
Exhaust Gas Recirculation A Control Circuit |
- Exhaust gas recirculation (EGR) valve circuit high resistance
- EGR valve circuit short circuit to ground
- EGR valve circuit short circuit to power
- EGR valve failure
|
Refer to the relevant workshop manual section. Check the EGR
valve, coolers and pipework. Refer to the electrical guides and check the
MAF sensor and circuits. Allow the engine to warm up, switch off and turn
the ignition on. Using a data logger function, check the EGR valve angle.
Command the valve actuator to 0% then 100% pulse width modulated (PWM) and
recheck the values. The angle should range between 5% and 95%. If this is
not the case, install a new valve as necessary. Clear the DTCs and test
for normal operation. |
| P040400 |
Exhaust Gas Recirculation A Control Circuit
Range/Performance |
- Intake air temperature (IAT) sensor fault
- Manifold air pressure (MAP) sensor fault
- MAF sensor fault
- Exhaust gas recirculation (EGR) valve stuck/sticking
- EGR valve circuit high resistance
- EGR valve circuit short circuit to ground
- EGR valve circuit short circuit to power
- EGR valve failure
|
Refer to the relevant workshop manual section. Check the EGR
valve, coolers and pipework. Refer to the electrical guides and check the
MAF sensor and circuits. Allow the engine to warm up, switch off and turn
the ignition on. Using a data logger function, check the EGR valve angle.
Command the valve actuator to 0% then 100% pulse width modulated (PWM) and
recheck the values. The angle should range between 5% and 95%. If this is
not the case, install a new valve as necessary. Clear the DTCs and test
for normal operation. |
| P040500 |
Exhaust Gas Recirculation Sensor A Circuit Low |
- Exhaust gas recirculation (EGR) valve circuit high resistance
- EGR valve circuit short circuit to ground
- EGR valve failure
|
Refer to the relevant workshop manual section. Check the EGR
valve, coolers and pipework. Refer to the electrical guides and check the
MAF sensor and circuits. Allow the engine to warm up, switch off and turn
the ignition on. Using a data logger function, check the EGR valve angle.
Command the valve actuator to 0% then 100% pulse width modulated (PWM) and
recheck the values. The angle should range between 5% and 95%. If this is
not the case, install a new valve as necessary. Clear the DTCs and test
for normal operation. |
| P040600 |
Exhaust Gas Recirculation Sensor A Circuit High |
- Exhaust gas recirculation (EGR) valve circuit short circuit to power
- EGR valve failure
|
Refer to the relevant workshop manual section. Check the EGR
valve, coolers and pipework. Refer to the electrical guides and check the
MAF sensor and circuits. Allow the engine to warm up, switch off and turn
the ignition on. Using a data logger function, check the EGR valve angle.
Command the valve actuator to 0% then 100% pulse width modulated (PWM) and
recheck the values. The angle should range between 5% and 95%. If this is
not the case, install a new valve as necessary. Clear the DTCs and test
for normal operation. |
| P040700 |
Exhaust Gas Recirculation Sensor B Circuit Low |
- Exhaust gas recirculation (EGR) throttle position sensor circuit
high resistance
- EGR throttle position sensor circuit short circuit to ground
- EGR modulator failure
|
Check the EGR throttle position sensor and circuits. Refer
to the electrical guides. If no fault is found in the circuits, install a
new EGR valve. Clear the DTCs and test for normal operation. |
| P040800 |
Exhaust Gas Recirculation Sensor B Circuit High |
- Exhaust gas recirculation (EGR) throttle position sensor circuit
short circuit to power
- EGR modulator failure
|
Check the EGR throttle position sensor and circuits. Refer
to the electrical guides. If no fault is found in the circuits, install a
new EGR valve. Clear the DTCs and test for normal operation. |
| P048700 |
Exhaust Gas Recirculation Throttle Control Circuit A / Open
|
- Exhaust gas recirculation (EGR) throttle position sensor circuit
high resistance
- Exhaust gas recirculation (EGR) throttle position sensor circuit
short circuit to ground
- Exhaust gas recirculation (EGR) throttle position sensor circuit
short circuit to power
- EGR modulator failure
|
Check the EGR throttle position sensor and circuits. Refer
to the electrical guides. Using a data logger function, check the EGR
throttle position with the ignition on, engine off and record the value.
Command the actuator to 100% pulse width modulated (PWM) and recheck the
position reading. The value should be 80 - 95%. Command the actuator to 0%
pulse width modulated (PWM) and recheck the position reading. The value
should be 5 - 20%. Manually close and open the throttle and check the
resistance. The resistance should range from 300 - 2,500 ohms. If the
values are not in this range, install a new EGR valve. Clear the DTCs and
test for normal operation. If there is still an issue, suspect the ECM.
Refer to the warranty policy and procedures manual if an ECM is suspect.
|
| P048800 |
Exhaust Gas Recirculation Throttle Control Circuit A
Range/Performance |
- Exhaust gas recirculation (EGR) throttle position sensor circuit
high resistance
- Exhaust gas recirculation (EGR) throttle position sensor circuit
short circuit to ground
- Exhaust gas recirculation (EGR) throttle position sensor circuit
short circuit to power
- EGR modulator failure
|
Check the EGR throttle position sensor and circuits. Refer
to the electrical guides. Using a data logger function, check the EGR
throttle position with the ignition on, engine off and record the value.
Command the actuator to 100% pulse width modulated (PWM) and recheck the
position reading. The value should be 80 - 95%. Command the actuator to 0%
pulse width modulated (PWM) and recheck the position reading. The value
should be 5 - 20%. Manually close and open the throttle and check the
resistance. The resistance should range from 300 - 2,500 ohms. If the
values are not in this range, install a new EGR valve. Clear the DTCs and
test for normal operation. If there is still an issue, suspect the ECM.
Refer to the warranty policy and procedures manual if an ECM is suspect.
|
| P133400 |
EGR Throttle Position Sensor Minimum/Maximum Stop
Performance |
- Exhaust gas recirculation (EGR) valve stuck/sticking
- EGR valve circuit high resistance
- EGR valve circuit short circuit to ground
- EGR valve circuit short circuit to power
- Intake air shut off throttle stuck/sticking
- Intake air shut off throttle circuit high resistance
- Intake air shut off throttle circuit short circuit to ground
- Intake air shut off throttle circuit short circuit to power
- Intake air shut off throttle failure
- ECM failure
|
Check the EGR valve and circuits. Refer to the electrical
guides. Refer to the relevant workshop manual section. Refer to the
warranty policy and procedures manual if a module is suspect. |
| P133500 |
EGR Position Sensor Minimum/Maximum Stop Performance |
- EGR valve circuit high resistance
- EGR valve circuit short circuit to ground
- EGR valve circuit short circuit to power
- EGR valve failure
|
Check the EGR valve and circuits. Refer to the electrical
guides. Using a datalogger function, check the EGR valve angles and
command the valve to 0% pulse width modulated (PWM). Recheck the angle.
The value should be 0 - 20%. If the value is outside this range, install a
new valve. Refer to the relevant workshop manual section. Clear the DTCs
and test for normal operation. |
| P140A00 |
Exhaust Gas Recirculation Sensor C Circuit Low |
- EGR valve circuit (left-hand bank) high resistance
- EGR valve circuit short circuit to ground
- EGR valve failure
|
Check the EGR valve and circuits. Refer to the electrical
guides. Using a datalogger function, check the EGR valve angle with the
ignition on and the engine off. Command the valve angle to 0% pulse width
modulated (PWM), then to 100% pulse width modulated (PWM) and recheck the
angles. The angles should range between 0 - 20% and 80 - 95%. If this is
not the case, install a new valve. Refer to the relevant workshop manual
section. Clear the DTCs and test for normal operation. |
| P140B00 |
Exhaust Gas Recirculation Sensor C Circuit High |
- EGR valve circuit (left-hand bank) short circuit to power
- EGR valve failure
|
Check the EGR valve and circuits. Refer to the electrical
guides. Using a datalogger function, check the EGR valve angle with the
ignition on and the engine off. Command the valve angle to 0% pulse width
modulated (PWM), then to 100% pulse width modulated (PWM) and recheck the
angles. The angles should range between 0 - 20% and 80 - 95%. If this is
not the case, install a new valve. Refer to the relevant workshop manual
section. Clear the DTCs and test for normal operation. |
| P140C00 |
Exhaust Gas Recirculation Control Circuit B |
- Intake air shut off throttle circuit high resistance
- Intake air shut off throttle circuit short circuit to ground
- Intake air shut off throttle circuit short circuit to power
- Intake air shut off throttle failure
- ECM failure
|
Check the EGR valve and circuits. Refer to the electrical
guides. Refer to the warranty policy and procedures manual if a module is
suspect. |
| P140D00 |
Exhaust Gas Recirculation Control Circuit B
Range/Performance |
- Exhaust gas recirculation (EGR) control circuit range/performance
(left-hand bank)
- Intake air temperature (IAT) sensor fault
- Manifold absolute pressure (MAP) sensor fault
- Mass air flow (MAF) sensor fault
- EGR valve stuck closed, blocked
- EGR valve circuit high resistance
- EGR valve circuit short circuit to ground
- EGR valve circuit short circuit to power
- EGR valve failure
|
Check the IAT, MAP and MAF sensors and circuits. Refer to
the electrical guides. For left-hand bank EGR valve circuit tests, refer
to the relevant workshop manual section. |
| P140E00 |
EGR Position Sensor C Minimum/Maximum Stop Performance |
- Exhaust gas recirculation (EGR) valve circuit (left-hand bank) high
resistance
- EGR valve circuit short circuit to ground
- EGR valve circuit short circuit to power
- EGR valve failure
|
Check the EGR valve and circuits. Refer to the electrical
guides. Using a datalogger function, check the EGR valve angles and
command the valve to 0% pulse width modulated (PWM). Recheck the angle.
The value should be between 0 - 20%. If the value is outside this range,
install a new valve. Refer to the relevant workshop manual section. Clear
the DTCs and test for normal operation. |
| P141A00 |
Exhaust Gas Recirculation Sensor A Circuit
Intermittent/Erratic |
- EGR valve circuit (right-hand bank) high resistance
- EGR valve circuit short circuit to ground
- EGR valve circuit short circuit to power
- EGR valve failure
|
Check the EGR valve and circuits. Refer to the electrical
guides. Start the engine and allow to warm up. Using a datalogger
function, check the EGR valve position. After a further 5 seconds, recheck
the position. If the value has increased by more than 80% per 10 ms,
recheck the circuits. If no fault is found in the circuits, install a new
EGR valve. Refer to the relevant workshop manual section. Clear the DTCs
and test for normal operation. |
| P141B00 |
Exhaust Gas Recirculation Sensor B Circuit
Intermittent/Erratic |
- Intake air shut off throttle circuit high resistance
- Intake air shut off throttle circuit short circuit to ground
- Intake air shut off throttle circuit short circuit to power
- Intake air shut off throttle failure
|
Check the EGR valve and circuits. Refer to the electrical
guides. Start the engine and allow to warm up. Using a datalogger
function, check the EGR valve position. After a further 5 seconds, recheck
the position. If the value has increased by more than 80% per 10 ms,
recheck the circuits. If no fault is found in the circuits, install a new
EGR valve. Refer to the relevant workshop manual section. Clear the DTCs
and test for normal operation. |
| P141C00 |
Exhaust Gas Recirculation Sensor C Circuit
Intermittent/Erratic |
- EGR valve circuit (left-hand bank) high resistance
- EGR valve circuit short circuit to ground
- EGR valve circuit short circuit to power
- EGR valve failure
- ECM failure
|
Check the EGR valve and circuits. Refer to the electrical
guides. Start the engine and allow to warm up. Using a datalogger
function, check the EGR valve position. After a further 5 seconds, recheck
the position. If the value has increased by more than 80% per 10 ms,
recheck the circuits. If no fault is found in the circuits, install a new
EGR valve. Refer to the relevant workshop manual section. Clear the DTCs
and test for normal operation. |
| P214100 |
Exhaust Gas Recirculation Throttle Control Circuit A Low |
- EGR sensor circuits short circuit (to ground/power/other circuits
- EGR sensor circuits high resistance
- EGR sensor fault
|
Check the EGR sensor circuits. Refer to the electrical
guides. Rectify as necessary. Clear the DTCs and test for normal
operation. Using a datalogger function, read the difference between the
EGR throttle set point and the actual throttle position, and the EGR
throttle position. Check that the throttle is open and command the
throttle closed. Check that the throttle position value increases to above
90%. Check the difference between set point and actual. This value should
not exceed either maximum 5% or minimum -15%. Check that the EGR throttle
is not sticking. Install a new right-hand valve as necessary. Refer to the
relevant workshop manual section. Clear the DTCs and test for normal
operation. |
| P214200 |
Exhaust Gas Recirculation Throttle Control Circuit A High
|
- EGR sensor circuits short circuit (to ground/power/other circuits
- EGR sensor circuits high resistance
- EGR sensor fault
|
Check the EGR sensor circuits. Refer to the electrical
guides. Rectify as necessary. Clear the DTCs and test for normal
operation. Using a datalogger function, read the difference between the
EGR throttle set point and the actual throttle position, and the EGR
throttle position. Check that the throttle is open and command the
throttle closed. Check that the throttle position value increases to above
90%. Check the difference between set point and actual. This value should
not exceed either maximum 5% or minimum -15%. Check that the EGR throttle
is not sticking. Install a new left-hand valve as necessary. Refer to the
relevant workshop manual section. Clear the DTCs and test for normal
operation. |