DTC P0457:00 [L3 Turbo]

DTC P0457:00	EVAP system leak detected (fuel cap loose/off)
DETECTION CONDITION	• P0457:00 indicates that the initial vacuum could not be achieved after a refueling event and the purge vapor flow is excessive (gross leak). Diagnostic support note • This is an intermittent monitor (EVAP system). • The MIL will be illuminated after a malfunction has been detected on three consecutive driving cycles. The MIL will be extinguished after three consecutive driving cycles where the monitor was run without a malfunction. • PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle. • FREEZE FRAME DATA (Mode 2)/Snapshot data is available. • DTCs are stored in the PCM memory.
POSSIBLE CAUSE	• Missing or loose fuel filler cap • PCM malfunction

DTC P0457:00

EVAP system leak detected (fuel cap loose/off)

DETECTION CONDITION

• P0457:00 indicates that the initial vacuum could not be achieved after a refueling event and the purge vapor flow is excessive (gross leak).

Diagnostic support note

• This is an intermittent monitor (EVAP system).

• The MIL will be illuminated after a malfunction has been detected on three consecutive driving cycles. The MIL will be extinguished after three consecutive driving cycles where the monitor was run without a malfunction.

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

• FREEZE FRAME DATA (Mode 2)/Snapshot data is available.

• DTCs are stored in the PCM memory.

POSSIBLE CAUSE

• Missing or loose fuel filler cap

• PCM malfunction

STEP	INSPECTION	ACTION
1	VERIFY FREEZE FRAME DATA (MODE 2)/SNAPSHOT DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAVE BEEN RECORDED • Have the snapshot data and DIAGNOSTIC MONITORING TEST RESULTS (EVAP system related) been recorded?	Yes	Go to the next step.
No	Record the FREEZE FRAME DATA (Mode 2)/snapshot data and DIAGNOSTIC MONITORING TEST RESULTS on 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 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	VERIFY RELATED PENDING CODE AND STORED DTC • Turn the ignition switch off, then to the ON position (engine off). • Perform the DTC Reading Procedure and Pending Trouble Code Access Procedure. (See ON-BOARD DIAGNOSTIC TEST [L3 Turbo].) • Are any other DTCs present? Note • If the DTC P0455:00 is present, diagnose the DTC P0455:00 first.	Yes	Go to the applicable DTC inspection. (See DTC TABLE [L3 Turbo].)
No	Go to the next step.
4	INSPECT FUEL FILLER CAP FOR MISSING OR LOOSENESS • Visually inspect the fuel filler cap for missing or looseness. • Is there any malfunction?	Yes	Repair or replace the fuel filler cap, then go to the next step.
No	Go to the next step.
5	EVAP SYSTEM LEAK INSPECTION • Perform the EVAP system leak inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 Turbo].) • Is the test result normal?	Yes	Go to the next step.
No	Leakage still exists. • Perform the DTC P0455:00 inspection. (See DTC P0442:00, P0455:00 [L3 Turbo].)
6	VERIFY DTC TROUBLESHOOTING COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. (See AFTER REPAIR PROCEDURE [L3 Turbo].) • Perform the Pending Trouble Code Access Procedure. (See ON-BOARD DIAGNOSTIC TEST [L3 Turbo].) • Is the PENDING CODE for this DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [L3 Turbo].)
No	Go to the next step.
7	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [L3 Turbo].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [L3 Turbo].)
No	DTC troubleshooting completed.

STEP

INSPECTION

ACTION

VERIFY FREEZE FRAME DATA (MODE 2)/SNAPSHOT DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAVE BEEN RECORDED

• Have the snapshot data and DIAGNOSTIC MONITORING TEST RESULTS (EVAP system related) been recorded?

Yes

Go to the next step.

Record the FREEZE FRAME DATA (Mode 2)/snapshot data and DIAGNOSTIC MONITORING TEST RESULTS on 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 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.

VERIFY RELATED PENDING CODE AND STORED DTC

• Turn the ignition switch off, then to the ON position (engine off).

• Perform the DTC Reading Procedure and Pending Trouble Code Access Procedure. (See ON-BOARD DIAGNOSTIC TEST [L3 Turbo].)

• Are any other DTCs present?

Note

• If the DTC P0455:00 is present, diagnose the DTC P0455:00 first.

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [L3 Turbo].)

Go to the next step.

INSPECT FUEL FILLER CAP FOR MISSING OR LOOSENESS

• Visually inspect the fuel filler cap for missing or looseness.

• Is there any malfunction?

Yes

Repair or replace the fuel filler cap, then go to the next step.

Go to the next step.

EVAP SYSTEM LEAK INSPECTION

• Perform the EVAP system leak inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 Turbo].)

• Is the test result normal?

Yes

Go to the next step.

Leakage still exists.

• Perform the DTC P0455:00 inspection. (See DTC P0442:00, P0455:00 [L3 Turbo].)

VERIFY DTC TROUBLESHOOTING COMPLETED

• Make sure to reconnect all disconnected connectors.

• Clear the DTC from the PCM memory using the M-MDS. (See AFTER REPAIR PROCEDURE [L3 Turbo].)

• Perform the Pending Trouble Code Access Procedure. (See ON-BOARD DIAGNOSTIC TEST [L3 Turbo].)

• Is the PENDING CODE for this DTC present?

Yes

Replace the PCM, then go to the next step.

(See PCM REMOVAL/INSTALLATION [L3 Turbo].)

Go to the next step.

VERIFY AFTER REPAIR PROCEDURE

• Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [L3 Turbo].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [L3 Turbo].)

DTC troubleshooting completed.