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P144E Buick Code - Closed Loop Diesel Particulate Filter Regeneration Control At Limit Stage 2 Low Temperature

- Code Popularity: 191 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P144E Buick?

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 Exhaust Gas Temperature Sensor
  • Exhaust Gas Temperature Sensor harness is open or shorted
  • Exhaust Gas Temperature Sensor circuit poor electrical connection
  • Faulty Diesel Oxidation Catalyst (DOC)
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How to Fix the DTC P144E Buick?

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 P144E Buick 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.

What are Code Possible Symptoms?

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

Code P144E Buick Description

The main function of the Close-Coupled Diesel Oxidation Catalyst (CCDOC) is to control emissions of non-methane hydrocarbons and Carbon Monoxide (CO). Its secondary function is to assist with the Diesel Particulate Filter (DPF) regeneration, by obtaining and sustaining the temperature necessary for regeneration. In order to generate the high exhaust temperatures needed for regeneration, the aftertreatment system increases exhaust temperatures by injecting diesel fuel into the exhaust system via post-injection. The injected fuel is converted into heat by the Diesel Oxidation Catalyst (DOC) to incinerate soot accumulated in the DPF. The Engine Control Module (ECM) monitors the exhaust gas temperature sensor 1 and 2 to determine if catalyst downstream temperatures are achieved during a DPF regeneration.
The Diagnostic Trouble Code (DTC) will be set when the ECM detects insufficient exhaust temperature downstream of the first diesel oxidation catalyst during a DPF regeneration.

OBDII Code P144E Buick - Closed Loop Diesel Particulate Filter Regeneration Control At Limit Stage 2 Low Temperature - AutoCodes.com
P144E Buick Code - Closed Loop Diesel Particulate Filter Regeneration Control At Limit Stage 2 Low Temperature

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