Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).
Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).
Normal Operation and Fault Conditions
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Condition |
|---|---|---|
| PCM P144B:00 | EVAP System Secondary Purge Vapor Line Restricted/Blocked: No Sub Type Information | Evaporative Emission System Secondary Purge Vapor Line Restricted/Blocked |
| PCM P24C0:00 | EVAP System Leak Detection Pump Switching Valve Stuck On: No Sub Type Information | Evaporative Emission System Leak Detection Pump Switching Valve Stuck On |
Possible Sources
- Fuel tank filler pip
- Visually inspect the following components for signs of damage:
- Fuel tank filler pipe
- Fuel tank filler pipe vent tube, if equipped
- EVAP system (Look for kinked or bent vapor lines)
- Fuel tank inlet check valve (part of the fuel tank)
- Fuel level vent valve (part of the fuel tank)
- EVAP canister (may be saturated with liquid)
Are any of the components damaged?
| Yes | REPAIR or INSTALL a new components to correct the concern. |
| No | GO to A2 |
- Using a diagnostic scan tool, perform the PCM self-test.
- Check for any of the following indication DTC s: P25B0, P0461, P0462, P0463.
Are any indication DTCs present?
| Yes | If DTC 's are present, correct the associated issue. or Workshop manual |
| No | If no DTC 's proceed to check for EVAP DTC s. GO to A3 |
- Using a diagnostic scan tool, perform the PCM self-test.
- Check the PCM for any of the EVAP DTC s: P00FE, P04B4, P04F0, P0496, P24BE, P24BF, P24C1, P144B, P2418, P2450, P2451, P0451, P0452 and P0453.
Are any EVAP system DTC's present?
| Yes | If DTC 's are present, correct the associated issue. |
| No | GO to A4 |
- Monitor the fuel tank pressure (FTP) for typical diagnostic reference values while filling the fuel tank.
Is the FTP less than 1" H2O / 0.25 kPa?
| Yes | GO to A5 |
| No | Is the FTP less than 12" H2O / 3.0 kPa? Yes : GO to A6 No : GO to A7 |
- Disconnect the fuel filler pipe from the fuel tank.
- Inspect the fuel filler pipe for damage or blockage.
Is the fuel filler pipe assembly blocked or damaged?
| Yes | Replace the fuel filler pipe assembly. REFER to: Fuel Tank Filler Pipe (310-01C Fuel Tank and Lines, Removal and Installation). |
| No | Replace the fuel tank assembly. REFER to: Fuel Tank (310-01C Fuel Tank and Lines, Removal and Installation). |
- Using a different fuel pump nozzle, monitor the fuel tank pressure (FTP) for typical diagnostic reference values while filling the fuel tank.
Is the FTP less than 12" H2O / 3.0 kPa?
| Yes | System Normal - Unable to identify the root cause at this time. |
| No | GO to A7 |
- Disconnect the fresh air line from evaporative leak detection pump (ELDP).
Is the fresh air hose blocked or damaged?
| Yes | Repair / Replace the fresh air hose. |
| No | GO to A8 |
- Disconnect the evaporative leak detection pump (ELDP) from the Evap canister.
- Monitor the fuel tank pressure (FTP) to typical diagnostic reference values while filling the fuel tank.
Is the FTP less than 12" H2O / 3.0 kPa?
| Yes | Remove / Replace the evaporative leak detection pump (ELDP). REFER to: Evaporative Emission System Leak Test (303-13C Evaporative Emissions, General Procedures). |
| No | GO to A9 |
- Disconnect the EVAP canister from the fuel vapor load line.
- Monitor the fuel tank pressure (FTP) to typical diagnostic reference values while filling the fuel tank.
Is the FTP less than 12" H2O / 3.0 kPa?
| Yes | Remove / Replace the EVAP canister. REFER to: Evaporative Emission Canister Purge Valve (303-13C Evaporative Emissions, Removal and Installation). |
| No | Remove / Replace the fuel vapor line including the fuel vapor vent valve (FVVV) and Tank Pressure Control Valve (TPC). |
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