Engine wants to stall - Code P1450 & P144A/C - Evap Purge Valve

[enigma-2]

There may be a couple of other checks that come to mind. Gas cap gasket or cap not clicked when being replaced. Wiring to the purge valve. Corrosion in the connector, Micky chewing on wires ..

[1004ron]

CEL triggered again on the way home from work.

 

Gas tank filler cap seal is good.

 

Just read codes and installed a 3rd party evap valve.

 

First evap valve replacement in Oct 2021 at 71K miles and second at 110K miles.

 

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===PCM DTC P144C:00-EC===
Code: P144C - EVAP System Purge Flow Performance During Boost

Status:
 - DTC Maturing - Intermittent at Time of Request
 - Malfunction Indicator Lamp is On for this DTC
 - Test not complete

Module: Powertrain Control Module

 Freeze Frame  #1:

 Freeze Frame  #2:
-EVENT_TIME: 254234679 s (Thu Jan 30 16:15:12 2025) - Event time
-TOTAL_DISTANCE: 177194 km - Total Distance
-FUELSYS: Closed Loop  - Fuel System Status (Open/Closed Loop)
-LOAD: 62.35 % - Calculated Load Value
-ECT: 93 °C - Engine coolant temperature
-SHRTFT1: -3.12 % - Short term fuel trim 1
-LONGFT1: 7.81 % - Long term fuel trim 1
-SHRTFT2: -2.34 % - Short term fuel trim 2
-LONGFT2: 8.59 % - Long term fuel trim 2
-MAP: 144.0 kPa - Manifold absolute pressure sensor
-RPM: 2784 1/min - Engine Revolutions Per Minute
-VSS: 118.0 km/h - Vehicle Speed
-SPARKADV: 10.00 ° - Spark Advance
-IAT: 12 °C - Intake Air Temperature
-RUNTM: 1429 s - Time Since Engine Start
-EVAP_PCT: 0.00 % - Commanded Evaporative Purge
-FLI: 59.61 % - Fuel Level
-BARO: 98.0 kPa - Barometric pressure
-VPWR: 13.01 V - Control Module Voltage
-TP_REL: 34.12 % - Relative Throttle Position
-TAC_PCT: 44.31 % - Commanded Throttle Actuator Control
-RPMDSD: 600 1/min - Desired Idle Speed RPM
-O2S12: 0.66 V - Heated Exhaust Gas Oxygen Sensor (bank 1, sensor 2)
-O2S22: 0.50 V - Heated Exhaust Gas Oxygen Sensor (bank 2, sensor 2)
-TQ_CNTRL: None Requested  - Torque Control Requested
-ENGOFF_TIMER: 32784 s - Timer since Engine Off
-APP_FLT: No Fault  - Accelerator Pedal Position Sensor Status
-MISFIRE: No  - Engine Misfire currently detected
-IAT_F: No Fault  - Inlet Air Temperature Sensor Status
-ETC_TRIM_LRN: Yes  - Throttle Angle Offset has Learned
-TP_F: No Fault  - Throttle Position Sensor Status
-MP_LRN: Yes  - Misfire Profile Correction Learned
-MAF_F: No Fault  - Mass Air Flow Sensor Status
-MAP_F: No Fault  - Manifold Absolute Pressure Sensor Status
-APP1: 1.92 V - Accelerator pedal position sensor 1
-APP2: 0.96 V - Accelerator pedal position sensor 2
-TP1: 2.84 V - Throttle Position Sensor 1
-TP2: 2.18 V - Throttle Position Sensor 2
-GEAR: 5  - Gear Commanded
-GEAR_OSC: 5  - Gear Command by Output State Control
-TSS_SRC: 2771 1/min - Actual Turbine Shaft Speed
-OSS_SRC: 2770 1/min - Actual Output Shaft Speed
-TFT: 63 °C - Transmission Fluid Temperature
-TR: Drive/OverDrive  - Transmission range

===END PCM DTC===

===OBDII DTC P144C-C===
Code: P144C - EVAP System Purge Flow Performance During Boost

Status:
 - Confirmed - malfunction is confirmed

[enigma-2]

Glad you found the fix.

 

Personally I wouldn't have used aftermarket, but maybe its good enough. What brand did you go with? Always good to know if aftermarket works (and holds up.)

[1004ron]

Generally I use OEM but for this being a non critical device and two OEM ones didn't last as long as I'd expect, I went with the DORMAN 994073  at around half the price from RockAuto.com.