P20E8 2017 GMC Sierra Code - Reductant Low 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
- P20E8 2017 GMC Sierra indicates Reductant Low 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 P20E8 2017 GMC Sierra Description
What are the Possible Causes of the DTC P20E8 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 P20E8 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 P20E8 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 P20E8 2017 GMC Sierra code?
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Frequently Asked Questions about P20E8 2017 GMC Sierra Code
1. What are the common symptoms of OBDII code P20E8 (Reductant Low Pressure) in a 2017 GMC Sierra?
The common symptoms include the check engine light illuminating, reduced engine power, poor fuel efficiency, and potential difficulties in starting the vehicle.
2. What are the possible causes of OBDII code P20E8 in a 2017 GMC Sierra?
Possible causes of code P20E8 include a faulty reductant pressure sensor, issues with the reductant pump, a clogged diesel exhaust fluid (DEF) filter, or a malfunctioning DEF injector.
3. How can I diagnose OBDII code P20E8 in my 2017 GMC Sierra?
Diagnosing code P20E8 involves using an OBDII scanner to retrieve the specific fault code, inspecting the reductant system components for any visible damage or leaks, and testing the reductant pressure sensor and related components for proper functioning.
4. Can I continue driving my 2017 GMC Sierra with OBDII code P20E8?
It is not recommended to continue driving the vehicle with code P20E8 present, as it can lead to further damage to the emissions system and potentially reduce engine performance. It's best to address the issue promptly.
5. How can I repair OBDII code P20E8 in my 2017 GMC Sierra?
Repairing code P20E8 may involve replacing the faulty reductant pressure sensor, repairing or replacing the reductant pump, cleaning or replacing the DEF filter, or addressing any issues with the DEF injector.
6. Is it possible to reset OBDII code P20E8 in a 2017 GMC Sierra without addressing the underlying issue?
While you can clear the code temporarily with an OBDII scanner, it is crucial to diagnose and fix the root cause of code P20E8 to prevent it from reoccurring and ensure proper vehicle operation.
7. How much does it typically cost to repair OBDII code P20E8 in a 2017 GMC Sierra?
The cost of repairing code P20E8 can vary depending on the specific cause of the issue, the labor rates in your area, and whether you choose to address the problem yourself or take it to a professional mechanic. Costs may range from a few hundred to over a thousand dollars.
8. Can a DIY enthusiast with basic automotive knowledge repair OBDII code P20E8 in a 2017 GMC Sierra?
While some components related to code P20E8 can be accessible and replaceable by a DIY enthusiast, diagnosing and repairing the reductant system issues may require specialized tools and expertise. It is recommended to consult a professional if you are unsure.
9. How often does OBDII code P20E8 (Reductant Low Pressure) occur in a 2017 GMC Sierra?
The occurrence of code P20E8 can vary depending on factors such as vehicle usage, maintenance, and driving conditions. If the reductant system is not properly maintained, the likelihood of encountering this code may increase.
10. Are there any preventive measures to avoid OBDII code P20E8 in a 2017 GMC Sierra?
Regularly servicing the reductant system, using high-quality DEF, and ensuring proper driving habits can help prevent issues that may trigger code P20E8. Following the manufacturer's maintenance recommendations is key to minimizing the risk of this code appearing.
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