DTC P0487 [MZ-CD 1.6 (Y6) (EURO4 emission level)]

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DTC P0487

EGR throttle valve stuck or jammed error
DETECTION CONDITION
•  The PCM monitors the EGR throttle valve position based on the signal from the EGR throttle valve position sensor and compares the target value with it. If any of the following conditions is detected, the PCM determines that the EGR throttle valve is stuck or jammed.
―  EGR throttle valve position signal does not change above 0.02% for 4 s while the PCM commands that the EGR throttle valve closing.
―  EGR throttle valve position signal does not change for 4 s while the PCM commands that the EGR throttle valve opening
POSSIBLE CAUSE
•  Contaminate in EGR throttle valve
•  EGR throttle valve position sensor malfunction
•  Vent or damaged in wiring between EGR throttle valve and PCM
•  EGR throttle valve malfunction
•  PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
•  Has the FREEZE FRAME DATA been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2
VERIFY RELATED REPAIR INFORMATION AVAILABILITY
•  Verify related service 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.
3
VERIFY RELATED PENDING CODE AND/OR DTC
•  Switch the ignition to off, then to ON (engine off).
•  Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure.
•  Is the following PENDING CODE/DTC also present?
―  P0407, P0408, P2141, P2142
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZ-CD 1.6 (Y6) (EURO4 emission level)].)
No
Go to the next step.
(See DTC P0407 [MZ-CD 1.6 (Y6) (EURO4 emission level)].)
(See DTC P0408 [MZ-CD 1.6 (Y6) (EURO4 emission level)].)
(See DTC P2141 [MZ-CD 1.6 (Y6) (EURO4 emission level)].)
(See DTC P2142 [MZ-CD 1.6 (Y6) (EURO4 emission level)].)
4
VISUALLY INSPECT EGR THROTTLE VALVE FOR CONTAMINATION
•  Remove the EGR throttle valve component.
•  Visually inspect EGR throttle valve.
•  Is there any contamination?
Yes
Clean the EGR throttle valve, then go to Step 6.
No
Go to the next step.
5
INSPECT EGR THROTTLE VALVE POSITION SENSOR
•  Inspect the EGR throttle valve position sensor.
•  Is there any malfunction?
Yes
Inspect for open or short circuit in wiring harness between EGR throttle valve position sensor and PCM.
•  If the wiring harness is not normal, repair or replace malfunctioning part.
•  If the wiring harness is normal, replace the EGR throttle valve component.
Then go to the next step.
No
Replace the EGR throttle valve component, then go to the next step.
(See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZ-CD 1.6 (Y6)].)
6
VERIFY THAT DTC P0487 TROUBLESHOOTING IS COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Run the vehicle under the FREEZE FRAME DATA stored condition.
•  Is the same DTC present?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the PCM.
Go to the next step.
No
Go to the next step.
7
VERIFY AFTER REPAIR PROCEDURE
•  Perform the after repair procedure.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZ-CD 1.6 (Y6) (EURO4 emission level)].)
No
DTC troubleshooting completed.