P20E8 2017 GMC Sierra Code - Reductant Low Pressure
Quick Answer
The P20E8 diagnostic trouble code for a 2017 GMC Sierra indicates a problem with the Reductant Low Pressure system. Common causes include Leaking Reductant Lines: A leak in the Reductant system lines can cause a drop in pressure and trigger this code, Faulty Reductant Pump: A malfunctioning pump responsible for injecting the urea solution can lead to low pressure in the system, Clogged Reductant Filter: A blocked filter can restrict the flow of the urea solution, resulting in low pressure. 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 Leaking Reductant Lines: A leak in the Reductant system lines can cause a drop in pressure and trigger this code, Faulty Reductant Pump: A malfunctioning pump responsible for injecting the urea solution can lead to low pressure in the system, Clogged Reductant Filter: A blocked filter can restrict the flow of the urea solution, resulting in low pressure.
- 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 P20E8 2017 GMC Sierra Description
The P20E8 diagnostic trouble code for a 2017 GMC Sierra indicates a problem with the Reductant Low Pressure system. In vehicles equipped with Selective Catalytic Reduction (SCR) technology, such as diesel engines, the Reductant system is responsible for injecting a urea-based solution (AdBlue) into the exhaust stream to reduce harmful emissions. The Reductant Low Pressure code specifically points to an issue with the pressure in the system, which can lead to inefficient emission control and potential engine performance issues.
Common Causes of P20E8 2017 GMC Sierra
- Leaking Reductant Lines: A leak in the Reductant system lines can cause a drop in pressure and trigger this code.
- Faulty Reductant Pump: A malfunctioning pump responsible for injecting the urea solution can lead to low pressure in the system.
- Clogged Reductant Filter: A blocked filter can restrict the flow of the urea solution, resulting in low pressure.
- Sensor Malfunction: A faulty pressure sensor within the Reductant system can inaccurately detect pressure levels and trigger the code.
Symptoms of P20E8 2017 GMC Sierra
- Check Engine Light: The most common symptom associated with this code is the illumination of the Check Engine Light on the dashboard.
- Reduced Power: The vehicle may experience a decrease in power output or acceleration due to inefficient emission control.
- Poor Fuel Efficiency: A drop in fuel efficiency may be noticed as a result of the engine compensating for the emission control issue.
- Increased Emissions: The vehicle may produce higher levels of harmful emissions, which can be detected during emissions testing.
How to Fix P20E8 2017 GMC Sierra
- Diagnose the Issue: Use a diagnostic scanner to retrieve the trouble code and perform a thorough inspection of the Reductant system components.
- Check for Leaks: Inspect the Reductant lines and connections for any signs of leaks or damage.
- Test Reductant Pump: Verify the functionality of the Reductant pump by checking its pressure output.
- Replace Reductant Filter: If a clogged filter is identified as the cause, replace it with a new one.
- Repair or Replace Sensor: If the pressure sensor is found to be faulty, repair or replace it to ensure accurate pressure readings.
Cost to Fix P20E8 2017 GMC Sierra
The cost of repairing a Reductant Low Pressure issue can vary depending on the specific cause of the problem and the extent of the repairs needed. In general, the cost of parts for this repair can range from $100 to $500, with labor costs adding an additional $100 to $300. Overall, the total repair cost for addressing a P20E8 code in a 2017 GMC Sierra could range from $200 to $800. It's important to note that labor rates and parts prices can vary significantly based on location, the specific repair shop, and the availability of parts. It's recommended to obtain quotes from multiple repair facilities to get a more accurate estimate for this repair.
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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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