AutoCodes – RAM – P20F6 RAM

P20F6 RAM Code - Reductant Injection Valve Stuck Open Bank 1 Unit 1

Quick Answer

The Diesel Exhaust Fluid (DEF) Dosing Control Unit (DCU) monitors the DEF Injector. Common causes include Faulty Diesel Exhaust Fluid (DEF) Injector, DEF Injector harness is open or shorted, DEF Injector circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P20F6 RAM indicates Reductant Injection Valve Stuck Open Bank 1 Unit 1.
Common causes: Common causes include Faulty Diesel Exhaust Fluid (DEF) Injector, DEF Injector harness is open or shorted, DEF Injector circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 223

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 17, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P20F6 RAM Description

The Diesel Exhaust Fluid (DEF) Dosing Control Unit (DCU) monitors the DEF Injector. The Diagnostic Trouble Code (DTC) will be set when the DEF Dosing Control Unit detects that the DEF Injector is stuck based on the change in slope of the current profile.

OBDII Code P20F6 RAM - Reductant Injection Valve Stuck Open Bank 1 Unit 1 - AutoCodes.com — P20F6 RAM Code - Reductant Injection Valve Stuck Open Bank 1 Unit 1

What does this mean?

What are the Possible Causes of the DTC P20F6 RAM?

Faulty Diesel Exhaust Fluid (DEF) Injector
DEF Injector harness is open or shorted
DEF Injector circuit poor electrical connection
Faulty DEF Dosing Control Unit (DCU)

How to Fix the DTC P20F6 RAM?

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P20F6 RAM code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.