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AutoCodes - Generic - P20F4

P20F4 Code - Reductant Consumption Too Low

- Code Popularity: 19,452 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P20F4?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Low Diesel Exhaust Fluid Level
  • Contaminated Diesel Exhaust Fluid
  • Diesel Exhaust Fluid (DEF) Pressure Line Damage
  • DEF Injector Physically Stuck Open
  • Faulty DEF Supply Pump Assembly
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How to Fix the DTC P20F4?

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 P20F4 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 P20F4 Description

The Powertrain Control Module (PCM) monitors the Diesel Exhaust Fluid (DEF) consumption by comparing the DEF pressure in the supply line to the known DEF Supply Pump volume. This rationality comparison will detect DEF consumption high or low failures. The PCM will illuminate the MIL light immediately after the diagnostics runs and fails. The DEF injection into the aftertreatment system will be disabled.

OBDII Code P20F4 - Reductant Consumption Too Low - AutoCodes.com
P20F4 Code - Reductant Consumption Too Low

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Code P20F4 comments

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