PCM Diagnostic Trouble Code (DTC) Index

WARNING: This page is about a different car, the 2004 Mercury Monterey and 2004 Ford Freestar. However, it is still accessible from the selected car via links, so may be relevant.

PCM DIAGNOSTICS TROUBLE CODE (DTC) INDEX

DTC

Description

Source

Action

P0442

Small Leak Detected in EVAP System ⁽¹⁾

PCM

Go To PINPOINT TEST A: DTC P0442 SMALL LEAK IN EVAP SYSTEM .

P0457

Cap Off

PCM

Go To PINPOINT TEST A: DTC P0442 SMALL LEAK IN EVAP SYSTEM

P0456

Very Small Leak Detected in EVAP System

PCM

Go To PINPOINT TEST A: DTC P0442 SMALL LEAK IN EVAP SYSTEM .

P0455

Major Leak or no Flow Detected

PCM

Go To PINPOINT TEST B: DTC P0455 MAJOR LEAK OR NO FLOW DETECTED OR DTC P1443 VERY SMALL OR NO PURGE FLOW DETECTED IN SYSTEM .

P1443

Very Small or no Purge Flow Detected

PCM

Go To PINPOINT TEST B: DTC P0455 MAJOR LEAK OR NO FLOW DETECTED OR DTC P1443 VERY SMALL OR NO PURGE FLOW DETECTED IN SYSTEM .

P1450

Excessive Vacuum Detected in the Fuel Tank

PCM

Go To PINPOINT TEST C: DTC P1450 EXCESSIVE VACUUM DETECTED IN THE FUEL TANK .

Any Other PCM DTC

PCM

Refer to INTRODUCTION - CNG, FLEX-FUEL & GASOLINE .

⁽¹⁾	As small as 1.02 mm (0.040 in).