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AutoCodes - Generic - P144F

P144F Code - EGR Cooler Bypass Status Line Circuit High

- Code Popularity: 7,123 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P144F?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty EGR Cooler Bypass Valve
  • EGR Cooler Bypass Valve harness is open or shorted
  • EGR Cooler Bypass Valve circuit poor electrical connection
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How to Fix the DTC P144F?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P144F code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

When is the Code Detected?

The Powertrain Control Module (PCM) has detected battery voltage on the status line when no voltage should be present.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

Code P144F Description

The Exhaust Gas Recirculation (EGR) Cooler Bypass Valve is used to redirect the EGR gases around the cooler when the engine is under certain operating conditions. The EGR Cooler Bypass Valve is a smart device which communicates it's status to the Powertrain Control Module (PCM). At key on the EGR Cooler Bypass Valve drives the signal line low and then high and the PCM monitors for the correct status response from the EGR Cooler Bypass Valve. Throughout engine operation the PCM sends commands via the signal circuit to the EGR Cooler Bypass Valve and monitors the status line to confirm that the EGR Cooler Bypass Valve has reached the commanded position. When a fault occurs, the EGR Cooler Bypass valve will send a signal of less than one Volt on the status line to the PCM. This monitor is a one trip fault.
OBDII Code P144F - EGR Cooler Bypass Status Line Circuit High - AutoCodes.com
P144F Code - EGR Cooler Bypass Status Line Circuit High

Need More Information on the Code?

Need more information on how to fix the P144F code? Get Access to Factory Service Manuals

Information for Specific Makes

  • P144F Buick Closed Loop Diesel Particulate Filter Regeneration Control At Limit Stage 2 Low Temperature
  • P144F Cadillac Closed Loop Diesel Particulate Filter Regeneration Control At Limit Stage 2 Low Temperature
  • P144F Chevrolet Closed Loop Diesel Particulate Filter Regeneration Control At Limit Stage 2 Low Temperature
  • P144F Dodge EGR Cooler Bypass Status Line Circuit High
  • P144F GMC Closed Loop Diesel Particulate Filter Regeneration Control At Limit Stage 2 Low Temperature

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Code P144F comments

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