AutoCodes – Generic – P20CE

P20CE Code - Exhaust Aftertreatment Fuel Injector Control Circuit High Voltage

Quick Answer

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. Common causes include Faulty Exhaust Aftertreatment Fuel Injector, Exhaust Aftertreatment Fuel Injector harness is open or shorted, Exhaust Aftertreatment Fuel 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: P20CE indicates Exhaust Aftertreatment Fuel Injector Control Circuit High Voltage.
Common causes: Common causes include Faulty Exhaust Aftertreatment Fuel Injector, Exhaust Aftertreatment Fuel Injector harness is open or shorted, Exhaust Aftertreatment Fuel 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 5,302

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 Jul 27, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P20CE Description

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).

OBDII Code P20CE - Exhaust Aftertreatment Fuel Injector Control Circuit High Voltage - AutoCodes.com — P20CE Code - Exhaust Aftertreatment Fuel Injector Control Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P20CE?

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)

How to Fix the DTC P20CE?

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 P20CE 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.

Need more information about the P20CE code?

Need more information on how to fix the P20CE code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P20CE code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P20CE Buick — Exhaust Aftertreatment Fuel Injector Control Circuit High Voltage
P20CE Cadillac — Exhaust Aftertreatment Fuel Injector Control Circuit High Voltage
P20CE Chevrolet — Exhaust Aftertreatment Fuel Injector Control Circuit High Voltage
P20CE GMC — Exhaust Aftertreatment Fuel Injector Control Circuit High Voltage

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.