Engine-Codes - Generic - P20CB

P20CB Code - Exhaust Aftertreatment Fuel Injector Control Circuit

- Code Popularity: 24,149 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P20CB?

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 Aftertreatment Fuel Injector
  • Exhaust Aftertreatment Fuel Injector harness is open or shorted
  • Exhaust Aftertreatment Fuel Injector circuit poor electrical connection
  • Faulty Engine Control Module (ECM)
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How to Fix the DTC P20CB?

Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the P20CB code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

What Does the P20CB Code Mean?

The exhaust fuel addition injector assembly is mounted on the outlet of the turbocharger sub-assembly, and low-pressure fuel is supplied to the exhaust fuel addition injector assembly by the feed pump in the supply pump assembly. The exhaust fuel addition injector assembly adds fuel by a control signal from the Engine Control Module (ECM). This injector is used for two different controls: Particulate Matter (PM) forced regeneration and PM reduction. The ECM supplies power and ground to the high and low control circuits of the exhaust aftertreatment fuel injector. When the ECM detects a fault on either of the exhaust aftertreatment fuel injector circuits it sets a Diagnostic Trouble Code (DTC).

P20CB Code - Exhaust Aftertreatment Fuel Injector Control Circuit

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Code P20CB Information for Specific Makes

  • P20CB Buick Exhaust Aftertreatment Fuel Injector Control Circuit
  • P20CB Cadillac Exhaust Aftertreatment Fuel Injector Control Circuit
  • P20CB Chevrolet Exhaust Aftertreatment Fuel Injector Control Circuit
  • P20CB GMC Exhaust Aftertreatment Fuel Injector Control Circuit

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