P20E9 2017 GMC Sierra Code - Reductant High Pressure
Quick Answer
The P20E9 diagnostic trouble code for a 2017 GMC Sierra refers to an issue with the reductant high-pressure system. Common causes include Leaking reductant lines, Faulty reductant pressure sensor, Clogged reductant filter. 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 Leaking reductant lines, Faulty reductant pressure sensor, Clogged reductant filter.
- 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 P20E9 2017 GMC Sierra Description
The P20E9 diagnostic trouble code for a 2017 GMC Sierra refers to an issue with the reductant high-pressure system. In vehicles equipped with a selective catalytic reduction (SCR) system, such as diesel engines, reductant is injected into the exhaust to help reduce harmful emissions. The reductant is stored in a separate tank and pressurized before being injected into the exhaust stream to react with the harmful gases.
Common Causes of P20E9 2017 GMC Sierra
- Leaking reductant lines
- Faulty reductant pressure sensor
- Clogged reductant filter
- Malfunctioning reductant pump
- Issues with the SCR catalyst
Symptoms of P20E9 2017 GMC Sierra
- Check engine light illuminated
- Reduced fuel efficiency
- Failed emissions test
- Engine misfires
- Reduced engine performance
How to Fix P20E9 2017 GMC Sierra
- Diagnose the specific cause of the high-pressure issue using a scan tool to read the fault codes and perform system tests.
- Inspect the reductant lines, sensor, filter, and pump for any signs of damage, leaks, or clogs.
- Replace any faulty components identified during the inspection, such as the pressure sensor, pump, or filter.
- Clear the fault codes and reset the system to ensure the issue has been resolved.
- Test drive the vehicle to verify that the repair was successful and that the check engine light does not reappear.
Cost to Fix P20E9 2017 GMC Sierra
The cost of repairing a reductant high-pressure system issue can vary depending on the specific cause of the problem and the cost of parts and labor. In general, the cost of parts for this repair can range from $200 to $800, with labor costs adding an additional $100 to $300. Overall, the total repair cost for this issue could range from $300 to $1100. However, it's important to note that labor rates and part prices can vary, so it's recommended to check with local auto repair shops for a more accurate estimate.
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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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