P20E9 2017 GMC Sierra Code - Reductant High Pressure
Quick Answer
The pressure sensor information is used by Reductant Control Module; this module manages the reductant pressure system driving the PWM signal to the pump (corresponding to a speed setpoint for the reductant pressure pump) in order to build the pressure in the reductant pressure pipeline after the system start-up. Common causes include Faulty Reductant Injector, Reductant Injector harness is open or shorted, Reductant 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
- P20E9 2017 GMC Sierra indicates Reductant High Pressure.
- Common causes
- Common causes include Faulty Reductant Injector, Reductant Injector harness is open or shorted, Reductant 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.
Code P20E9 2017 GMC Sierra Description
What are the Possible Causes of the DTC P20E9 2017 GMC Sierra?
- Faulty Reductant Injector
- Reductant Injector harness is open or shorted
- Reductant Injector circuit poor electrical connection
- Faulty Reductant Pump and Sensor Assembly
How to Fix the DTC P20E9 2017 GMC Sierra?
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 P20E9 2017 GMC Sierra 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 P20E9 2017 GMC Sierra code?
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Frequently Asked Questions about P20E9 2017 GMC Sierra Code
1. What are common symptoms of OBDII code P20E9 in a 2017 GMC Sierra related to "Reductant High Pressure"?
The common symptoms include the check engine light coming on, reduced engine performance, and possible failure to start.
2. What could be the possible causes of OBDII code P20E9 in a 2017 GMC Sierra?
The code P20E9 indicates a fault with the reductant high-pressure system, which could be caused by issues with the reductant pump, pressure sensor, wiring, or the reductant quality sensor.
3. How can I diagnose the OBDII code P20E9 in my 2017 GMC Sierra?
Diagnosing this code typically involves using an OBDII scanner to retrieve the specific fault code, inspecting the reductant high-pressure system components for any visible damage or leaks, and performing electrical tests on sensors and wiring.
4. Can I drive my 2017 GMC Sierra with OBDII code P20E9 present?
It is not recommended to drive the vehicle with the code P20E9 present, as it may lead to reduced engine performance and potential damage to the emission control system. It is advisable to address the issue promptly.
5. What are some repair tips for fixing OBDII code P20E9 in a 2017 GMC Sierra?
Repair tips may include checking and replacing the reductant pump, pressure sensor, or wiring as needed, ensuring proper connections, and clearing the fault code to see if the issue persists.
6. Is it possible to reset OBDII code P20E9 in a 2017 GMC Sierra without fixing the underlying issue?
While you can clear the fault code using an OBDII scanner, it is not recommended to reset the code without addressing the root cause, as the issue may reoccur and potentially lead to more severe problems.
7. How much does it typically cost to repair OBDII code P20E9 in a 2017 GMC Sierra?
The cost of repairing this code can vary depending on the specific cause of the issue, the parts needed for replacement, labor costs, and whether you choose to address the problem yourself or take it to a professional mechanic.
8. Can a DIY enthusiast fix OBDII code P20E9 in a 2017 GMC Sierra?
Depending on your mechanical skills and access to tools, it may be possible to address the issue yourself by following repair guides, consulting service manuals, and using the necessary diagnostic equipment.
9. Will OBDII code P20E9 cause my 2017 GMC Sierra to fail an emissions test?
Yes, the presence of code P20E9 typically indicates a problem with the emission control system, which could result in a failed emissions test. It is advisable to address the issue before undergoing an emissions inspection.
10. How urgent is it to address OBDII code P20E9 in a 2017 GMC Sierra?
It is recommended to address the code P20E9 promptly to prevent potential damage to the emission control system, ensure optimal engine performance, and avoid failing an emissions test.
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