DTC P242F:00 [MZR-CD (RF Turbo)]

DTC P242F:00	Diesel particulate filter restriction-ash accumulation
DETECTION CONDITION	• The PCM calculates diesel particulate filter ash accumulation based on the exhaust gas pressure sensor signal. If the PCM calculates that ash accumulation amount is more than 15 g/L {0.94 lb/ft³}, the PCM determines that the diesel particulate filter ash accumulation excessive. Diagnostic support note • The MIL illuminates if the PCM detects the above malfunction condition in first drive cycle. • PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle. • FREEZE FRAME DATA is available. • The DTC is stored in the PCM memory.
POSSIBLE CAUSE	• Exhaust gas pressure sensor for poor connection • Exhaust gas pressure sensor piping restriction, damaged and/or improper connection • Diesel particulate filter restriction and/or damaged • PCM malfunction

DTC P242F:00

Diesel particulate filter restriction-ash accumulation

DETECTION CONDITION

• The PCM calculates diesel particulate filter ash accumulation based on the exhaust gas pressure sensor signal. If the PCM calculates that ash accumulation amount is more than 15 g/L {0.94 lb/ft³}, the PCM determines that the diesel particulate filter ash accumulation excessive.

Diagnostic support note

• The MIL illuminates if the PCM detects the above malfunction condition in first drive cycle.

• PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle.

• FREEZE FRAME DATA is available.

• The DTC is stored in the PCM memory.

POSSIBLE CAUSE

• Exhaust gas pressure sensor for poor connection

• Exhaust gas pressure sensor piping restriction, damaged and/or improper connection

• Diesel particulate filter restriction and/or damaged

• PCM malfunction

STEP	INSPECTION	ACTION
1	VERIFY FREEZE FRAME DATA AND DIAGNOSTIC MONITORING TEST RESULTS 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 SERVICE INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related Service Information available?	Yes	Perform the repair or diagnosis according to the available Service 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 P242F:00 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	INSPECT EXHAUST GAS PRESSURE SENSOR PIPING • Inspect for connection and condition at exhaust gas pressure sensor side piping. • Is there any clacked damaged and/or misconnection found?	Yes	Repair or replace malfunctioning part, then go to Step 6.
No	Go to the next step.
5	INSPECT EXHAUST GAS PRESSURE SENSOR FOR POOR CONNECTION • Switch the ignition to off. • Disconnect the exhaust gas pressure sensor connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion etc.). • Is there any malfunction?	Yes	Repair or replace the terminal, then go to the next step.
No	Replace the catalytic converter. (See EXHAUST SYSTEM REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].) Then go to the next step.
6	VERIFY TROUBLESHOOTING OF DTC P242F:00 COMPLETED • Make sure to reconnect all disconnected connectors. • Switch the ignition to ON (engine off). • Clear the DTC from PCM memory using the M-MDS. • 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.
7	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [MZR-CD (RF Turbo)].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [MZR-CD (RF Turbo)].)
No	DTC troubleshooting completed.

STEP

INSPECTION

ACTION

VERIFY FREEZE FRAME DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAS BEEN RECORDED

• Has FREEZE FRAME DATA been recorded?

Yes

Go to the next step.

Record the FREEZE FRAME DATA on the repair order, then go to the next step.

VERIFY RELATED SERVICE INFORMATION AVAILABILITY

• Verify related Service Information availability.

• Is any related Service Information available?

Yes

Perform the repair or diagnosis according to the available Service Information.

• If the vehicle is not repaired, go to the next step.

Go to the next step.

IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA

• Is DTC P242F:00 on FREEZE FRAME DATA?

Yes

Go to the next step.

Go to troubleshooting procedures for DTC in FREEZE FRAME DATA.

(See DTC TABLE [MZR-CD (RF Turbo)].)

INSPECT EXHAUST GAS PRESSURE SENSOR PIPING

• Inspect for connection and condition at exhaust gas pressure sensor side piping.

• Is there any clacked damaged and/or misconnection found?

Yes

Repair or replace malfunctioning part, then go to Step 6.

Go to the next step.

INSPECT EXHAUST GAS PRESSURE SENSOR FOR POOR CONNECTION

• Switch the ignition to off.

• Disconnect the exhaust gas pressure sensor connector.

• Inspect for poor connection (such as damaged/pulled-out pins, corrosion etc.).

• Is there any malfunction?

Yes

Repair or replace the terminal, then go to the next step.

Replace the catalytic converter.

(See EXHAUST SYSTEM REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].)

Then go to the next step.

VERIFY TROUBLESHOOTING OF DTC P242F:00 COMPLETED

• Make sure to reconnect all disconnected connectors.

• Switch the ignition to ON (engine off).

• Clear the DTC from PCM memory using the M-MDS.

• 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)].)

Go to the next step.

VERIFY AFTER REPAIR PROCEDURE

• Perform the “AFTER REPAIR PROCEDURE”.

(See AFTER REPAIR PROCEDURE [MZR-CD (RF Turbo)].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [MZR-CD (RF Turbo)].)

DTC troubleshooting completed.