Details On DTCs

WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.

DTC P144A:00 (PCM, SKYACTIV-G) DETECTION CONDITION AND POSSIBLE CAUSE

Description	Evaporator system: clogging between fuel tank and fuel tank pressure sensor
Detection condition	Determination conditions	The following conditions are all met while the vehicle is being driven: If negative pressure is inducted to the fuel tank via the intake manifold by the operation of the purge solenoid valve with the fuel tank in a sealed condition and the target negative pressure is reached within a shorter period of time than the estimated time. When the barometric pressure in the fuel tank is fixed and the purge solenoid valve is opened/closed, the negative pressure fluctuation in the fuel tank generates negative pressure exceeding the threshold.
	Preconditions	Evaporative gas flow amount: Exceeds 10, 000 cm³ /min or fuel tank vacuum is high Fuel tank pressure: -4, 340.2-4, 030.1 Pa {-442.57-410.95 kgf/m² , -0.62949-0.58452 psi}¹ IAT sensor No. 1: 4.44-43.33°C {40.0-109.9°F}¹ Vehicle speed: 64-145 km/h {40.0-90.0 mph}¹ Barometric pressure: 72.23 kPa {0.7365 kgf/cm² , 10.48 psi} or more^1 Period ignition is switched off before engine starts: 210 min or more Fuel level in fuel tank: 15-85 %^1 Minimum value of intake manifold vacuum: 4 kPa {0.04 kgf/cm² , 0.6 psi} or more Minimum value of intake air amount: more than 2 g/sec Battery voltage: more than 11 V¹ The following DTCs are not detected: ECT sensor: P0117:00 and P0118:00 TP sensor No. 1: P0122:00 and P0123:00 TP sensor No. 2: P0222:00 and P0223:00 Purge solenoid valve: P0443:00 CV solenoid valve: P0446:00 MAF sensor: P0100:00 Fuel tank pressure sensor: P0451:00, P0452:00 and P0453:00 IAT sensor No. 1: P0110:00 MAP sensor: P0069:00, P0107:00 and P0108:00 BARO sensor: P2226:00, P2228:00 and P2229:00 VSS signal: P0500:00 Fuel gauge sender unit: P0460:00, P0461:00, P0462:00 and P0463:00 ^*1 : Standard can be verified by displaying PIDs using M-MDS
	Malfunction determination period	75 s period
	Drive cycle	2
	Self test type	CMDTC self test
	Sensor used	Fuel tank pressure sensor
Fail-safe function	Not applicable
Vehicle status when DTCs are output	Not applicable
Possible cause	Erratic signal to PCM Fuel tank pressure sensor signal malfunction Fuel gauge sender unit malfunction Fuel tank pressure sensor malfunction Clogging between fuel tank and fuel tank pressure sensor Fuel shut-off valve malfunction Rollover valve malfunction Purge solenoid valve malfunction PCM malfunction