Ford P144A: EVAP System Purge Vapor Line Restricted/Blocked

Is your scanner showing Ford P144A?
No worries. We'll show you what it means and how to deal with it.

Presented by

Randy Worner

00:00/00:00

Ford P144A: EVAP System Purge Vapor Line Restricted/Blocked

OVERVIEW

Severity

Medium

DIY Difficulty Level

Intermediate

Repair Cost

$150-$300

Can I Still Drive?

Yes

What Does The Ford P144A Code Mean?

The PCM monitors the evaporative emission (EVAP) system for a restricted fuel vapor tube between the fuel tank pressure (FTP) sensor and the fuel tank. During the initial phase of the EVAP monitor, the PCM closes the canister vent and a vacuum develops in the fuel vapor tubes and lines and in the fuel tank. The PCM monitors the FTP sensor to determine the amount of vacuum and how quickly the vacuum increases. The rate at which the vacuum increases is compared to an expected value. If the vacuum increases quicker than expected, a restricted fuel vapor tube is suspected and an intrusive test is carried out in the final phase of the EVAP monitor. This DTC sets when the intrusive test confirms a blockage a counter is incremented and the counter reaches a calibrated number of completions.