DTC P144A:00 [MZI-3.7]: Notes

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

DETECTION CONDITION & POSSIBLE CAUSE

DTC P144A:00	Evaporative emission system purge vapor line restrict/blocked
DETECTION CONDITION	The PCM monitors the EVAP system for a blocked 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 blocked fuel vapor tube is suspected and an intrusive test is carried out in the final phase of the EVAP monitor If the intrusive test confirms a blockage a counter is incremented and once the counter reaches a calibrated number of completions, the DTC is set.
POSSIBLE CAUSE	Blocked fuel vapor tube between the FTP sensor and the fuel tank

DTC P144A:00

Evaporative emission system purge vapor line restrict/blocked

DETECTION CONDITION

The PCM monitors the EVAP system for a blocked 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 blocked fuel vapor tube is suspected and an intrusive test is carried out in the final phase of the EVAP monitor If the intrusive test confirms a blockage a counter is incremented and once the counter reaches a calibrated number of completions, the DTC is set.

POSSIBLE CAUSE

Blocked fuel vapor tube between the FTP sensor and the fuel tank