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P20C9 Isuzu Code - Diesel Exhaust Fluid Control Module Requested MIL Illumination

- Code Popularity: 41,121 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P20C9 Isuzu?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Check Diesel Exhaust Fluid (DEF) level and condition
  • Faulty Nitrogen Oxide (NOX) Sensor(s)
  • Faulty Diesel Exhaust Fluid Control Module
  • Diesel Exhaust Fluid Control Module harness is open or shorted
  • Diesel Exhaust Fluid Control Module circuit poor electrical connection
⚠ Does your Isuzu have Safety Recalls? → Check here

How to Fix the DTC P20C9 Isuzu?

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.

Code Tech Notes





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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P20C9 Isuzu 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 P20C9 Isuzu Description

The Diagnostic Trouble Code (DTC) will be set when the Diesel Exhaust Fluid (DEF) Control Module detects a problem with the DEF and requests the illumination of the Malfunction Indicator Light (MIL) to turn ON.

OBDII Code P20C9 Isuzu - Diesel Exhaust Fluid Control Module Requested MIL Illumination - AutoCodes.com
P20C9 Isuzu Code - Diesel Exhaust Fluid Control Module Requested MIL Illumination

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