DTC P2144 [AJ]

BME010202100W07

DTC P2144

EGR boost sensor solenoid valve circuit low input

DETECTION CONDITION

• The PCM monitors the EGR boost sensor solenoid valve control signal. If PCM turns the EGR boost sensor solenoid valve off but voltage still remains low, the PCM determines that the EGR boost sensor solenoid valve circuit has malfunction.
Diagnostic support note
• This is a continuous monitor (CCM).
• The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
• PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle.
• FREEZE FRAME DATA is available.
• DTC is stored in the PCM memory.

POSSIBLE CAUSE

• EGR boost sensor solenoid valve malfunction
• Connector or terminal malfunction
• Short to ground in wiring between EGR boost sensor solenoid valve terminal B and PCM terminal 93
• Open circuit in wiring between main relay terminal D and EGR boost sensor solenoid valve terminal A
• Open circuit in wiring between EGR boost sensor solenoid valve terminal B and PCM terminal 93
• PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
VERIFY RELATED REPAIR INFORMATION AVAILABILITY
• Check for related Service Information and/or on-line repair information availability.
• Is any related repair information available?
Yes
Perform repair or diagnosis according to the available repair information.
• If the vehicle is not repaired, go to the next step.
No
Go to the next step.
2
CLASSIFY INTERMITTENT CONCERN OR CONTINUOUS CONCERN
• Turn the ignition switch off then to the ON position (Engine off).
• Is same DTC present?
Yes
Go to the next step.
No
Intermittent concern exists. Go to INTERMITTENT CONCERNS TROUBLESHOOTING procedure.
3
CLASSIFY OPEN CIRCUIT OR SHORT TO GROUND MALFUNCTION
• Disconnect EGR boost sensor solenoid valve tube that connects to intake manifold.
• Connect vacuum pump to purge solenoid valve.
• Pump vacuum pump several times.
• Wait a few seconds.
• Is vacuum maintained?
Yes
Go to Step 5.
No
Go to the next step.
4
INSPECT PASSAGE CONTROL OF EGR BOOST SENSOR SOLENOID VALVE
• Turn the ignition switch off.
• Disconnect EGR boost sensor solenoid valve connector.
• Pump vacuum pump several times and stop to pumps then wait a few seconds.
• Is vacuum maintained?
Yes
Repair or replace harness for short to ground, then go to Step 10.
No
Replace EGR boost sensor solenoid valve, then go to Step 10.
5
INSPECT POOR CONNECTION OF EGR BOOST SENSOR SOLENOID VALVE CONNECTOR
• Turn the ignition switch off.
• Check for poor connection (damaged, pulled-out pins, corrosion, etc.).
• Is there any malfunction?
Yes
Repair or replace the terminal, then go to Step 10.
No
Go to the next step.
6
INSPECT EGR BOOST SENSOR SOLENOID VALVE
• Measure resistance between EGR boost sensor solenoid valve terminals (part-side).
• Is resistance within 37 -43 ohms?
Yes
Go to the next step.
No
Replace EGR boost sensor solenoid valve, then go to Step 10.
7
INSPECT EGR BOOST SENSOR SOLENOID VALVE POWER SUPPLY CIRCUIT FOR OPEN
• Turn the ignition switch to the ON position (Engine off).
• Measure voltage between EGR boost sensor solenoid valve terminal A (harness-side) and body ground.
• Is voltage B+?
Yes
Go to the next step.
No
Repair or replace harness for open, then go to Step 10.
8
INSPECT POOR CONNECTION OF PCM CONNECTOR
• Turn the ignition switch off.
• Disconnect PCM connector.
• Check for poor connection (damaged, pulled-out pins, corrosion, etc.).
• Is there any malfunction?
Yes
Repair terminal, then go to Step 10.
No
Go to the next step.
9
INSPECT EGR BOOST SENSOR SOLENOID VALVE CONTROL CIRCUIT FOR OPEN
• Connect EGR boost sensor solenoid valve connector.
• Connect the PCM connector.
• Turn the ignition switch to the ON position (Engine off).
• Measure voltage between PCM terminal 93 and body ground.
• Is voltage B+?
Yes
Go to the next step.
No
Repair or replace harness for open, then go to the next step.
10
VERIFY TROUBLESHOOTING OF DTC P2144 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Turn the ignition switch off then to the ON position (Engine off).
• Is same DTC present?
Yes
Replace PCM, then go to the next step.
No
Go to the next step.
11
VERIFY AFTER REPAIR PROCEDURE
• Perform the "After Repair Procedure".
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
No
Troubleshooting completed.