DTC P1450:00 [L3 Turbo]

DTC P1450:00 [L3 Turbo]SM2444062

id0102b7303100

DTC P1450:00	Unable to bleed up fuel tank vacuum
DETECTION CONDITION	• P1450:00 indicates the Self Test has detected that the EVAP system is unable to bleed up fuel tank vacuum. Diagnostic support note • This is an intermittent monitor (EVAP system). • The MIL illuminates if the PCM detects the above malfunction conditions 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 first drive cycle. • FREEZE FRAME DATA (Mode 2)/Snapshot data is available. • DTCs are stored in the PCM memory.
POSSIBLE CAUSE	• Excessive fuel tank vacuum ― Kinks or bends in the fuel vapor hoses and tubes ― Charcoal canister inlet port, CV solenoid valve, EVAP dust separator or outlet hose for contamination or foreign material • CV solenoid valve malfunction ― Stuck open or close • Fuel tank pressure sensor malfunction • PCM malfunction

DTC P1450:00

Unable to bleed up fuel tank vacuum

DETECTION CONDITION

• P1450:00 indicates the Self Test has detected that the EVAP system is unable to bleed up fuel tank vacuum.

Diagnostic support note

• This is an intermittent monitor (EVAP system).

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

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

• DTCs are stored in the PCM memory.

POSSIBLE CAUSE

• Excessive fuel tank vacuum

― Kinks or bends in the fuel vapor hoses and tubes

― Charcoal canister inlet port, CV solenoid valve, EVAP dust separator or outlet hose for contamination or foreign material

• CV solenoid valve malfunction

― Stuck open or close

• Fuel tank pressure sensor malfunction

• PCM malfunction

Diagnostic procedure

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.
1		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.
2		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?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [L3 Turbo].)
3		No	Go to the next step.
4	INSPECT FUEL TANK VACUUM • Verify kinks or bends in the fuel vapor hoses and tubes. • Visually inspect the charcoal canister inlet port, CV solenoid valve, EVAP dust separator or outlet hose for contamination or foreign material. • Is a concern evident?	Yes	Remove any contamination or foreign material around fuel vapor hoses and tubes. Repair the hoses, tubes or components if necessary, then go to Step 9.
4		No	Go to the next step.
5	PERFORM EVAP SYSTEM LEAK INSPECTION • Connect the leak tester to the fuel filler pipe. • Turn the ignition switch to the ON position (engine off). • Access the EVAPCV PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L3 Turbo].) • Close the CV solenoid valve. • Pressurize the EVAP system to 3.48 kPa {26.1 mmHg, 1.03 inHg}. • Does the pressure reach 3.48 kPa {26.1 mmHg, 1.03 inHg}?	Yes	Go to the next step.
5		No	Replace the CV solenoid valve if necessary, then go to Step 9. (See CANISTER VENT (CV) SOLENOID VALVE REMOVAL/INSTALLATION [L3 Turbo].)
6	INSPECT CV SOLENOID VALVE • Turn the ignition switch to the ON position (engine off). • Access the EVAPCV PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L3 Turbo].) • Open the CV solenoid valve. • Does the pressure drop immediately?	Yes	Go to the next step.
6		No	Replace the CV solenoid valve if necessary, then go to Step 9. (See CANISTER VENT (CV) SOLENOID VALVE REMOVAL/INSTALLATION [L3 Turbo].)
7	INSPECT FUEL TANK PRESSURE SENSOR • Disconnect the charcoal canister outlet tube at the charcoal canister. • Turn the ignition switch to the ON position (engine off). • Access the FTP PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L3 Turbo].) • Is the FTP PID value between 2.4 to 2.8 V?	Yes	Go to the next step.
7		No	Replace the evaporative hose component, then go to Step 9. (See FUEL TANK REMOVAL/INSTALLATION [L3 Turbo].)
8	PERFORM EVAP SYSTEM LEAK INSPECTION • Reconnect all disconnected connectors and hoses. • 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.
8		No	Leakage still exists. • Locate the leak point and repair. • Repeat this step.
9	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].)
9		No	Go to the next step.
10	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].)
10		No	DTC troubleshooting completed.