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DTC P0405 [MZR-CD (RF Turbo)]

id0102f1820600

DTC P0405 | EGR sensor circuit low input
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DETECTION CONDITION | • The PCM monitors input voltage from EGR position sensor when the engine switch is ON position. If input voltage is less than 0.2 V, the PCM determines that the EGR valve position sensor circuit has a malfunction. Diagnostic support note • MIL illuminates if PCM detects the above malfunctioning 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 PCM detects the above malfunction conditions during first drive cycle. • FREEZE FRAME DATA is available. • DTC is stored in the PCM memory.
POSSIBLE CAUSE | • EGR valve position sensor malfunction • Connector or terminal malfunction • Short to ground circuit between EGR valve terminal E and PCM terminal 53. • Open circuit between EGR valve terminal E and PCM terminal 53. • Open circuit between EGR valve terminal A and PCM terminal 45. • PCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has 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 • Check for related service repair information availability? | 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 | IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA • Is DTC P0405 on FREEZE FRAME DATA? | Yes | Go to the next step.
No | Go to troubleshooting procedures for DTC in FREEZE FRAME DATA. (See DTC TABLE [MZR-CD (RF Turbo)].)
4 | CLASSFY EGR VALVE POSITION SENSOR OR HARNESS MALFUNCTION • Connect the WDS or equivalent to DLC-2. • Access EGRP PID V mode. • Disconnect the EGR valve connector. • Connect a jumper wire between EGR valve terminal E and A (wiring harness-side). • Turn the engine switch to the ON position (engine off). • Is the EGRP PID more than 4.9 V? | Yes | Go to the next step.
No | Go to Step 6.
5 | INSPECT EGR VALVE POSITION SENSOR • Perform EGR valve position sensor inspection. (See EGR VALVE POSITION SENSOR INSPECTION [MZR-CD (RF Turbo)].) • Is the EGR valve position sensor normal? | Yes | Inspect for poor EGR valve connector terminal A connection. Repair or replace if necessary, then go to Step 9.
No | Replace the EGR valve, then go to Step 9. (See EGR VALVE REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].)
6 | INSPECT POWER SUPPLY CIRCUIT VOLTAGE AT EGR VALVE CONNECTOR • Turn the engine switch to the ON position (engine off). • Measure voltage at EGR valve terminal A (wiring harness-side). • Is the voltage within 4.5-5.5 V? | Yes | Go to the next step.
No | Repair or replace open circuit between EGR valve connector terminal A (wiring harness-side) and PCM connector terminal 45 (wiring harness-side). Then, go to Step 9.
7 | VERIFY EGR POSITION SENSOR SIGNAL CIRCUIT FOR OPEN • Turn the engine switch off. • inspect for continuity wiring harness side connectors between EGR valve terminal E and PCM terminal 53. • Is there any continuity? | Yes | Go to the next step.
No | Repair or replace for open, then go to Step 9.
8 | VERIFY EGR VALVE POSITION SIGNAL CIRCUIT FOR SHORT TO GROUND • inspect for continuity between EGR valve terminal E (wiring harness-side) and body ground. • Is there continuity? | Yes | Repair or replace for short to ground, then go to the next step.
No | Go to the next step.
9 | VERIFY TROUBLESHOOTING OF DTC P0405 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the WDS or equivalent. • Start the engine. • Is the same DTC present? | Yes | Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].)
No | Go to the next step.
10 | VERIFY AFTER REPAIR PROCEDURE • Perform "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE [MZR-CD (RF Turbo)].) • Is any DTCs present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [MZR-CD (RF Turbo)].)
No | Troubleshooting completed.