OBD-II Code P20E7 – Reductant Injection Air Pressure Too High: Explained by a Mechanic
As a mechanic, one of the most common issues I have come across with modern vehicles is OBD-II codes. So, What is OBD-II Code P20E7 – Reductant Injection Air Pressure Too High? In this article, I will discuss what this code means, why it occurs, and how to troubleshoot and fix this code.
What is OBD-II Code P20E7 – Reductant Injection Air Pressure Too High?
OBD-II Code P20E7 is a generic powertrain code that indicates an issue with the reductant injection system of a vehicle. This code means that the reductant injection air pressure is too high. The reductant system is designed to reduce harmful emissions that come from the exhaust system. Essentially, it injects a fluid (often referred to as DEF (Diesel Exhaust Fluid)) into the exhaust gases to decrease the amount of harmful pollutants produced by the engine.
When this code appears on your OBD-II reader, it means that the readings from the sensors in your vehicle’s reductant injection system have exceeded the maximum pressure limit. This could result in a variety of issues with your vehicle’s exhaust system and cause it to produce harmful emissions.
What Causes This Code to Occur?
This code is typically caused by a malfunction in the reductant injection system of your vehicle. It could be due to various issues, including:
1. Blocked reductant injector
2. Malfunctioning reductant pressure sensor
3. Failed reductant dosing pump
4. Damaged or disconnected wiring to the reductant system
How Can You Troubleshoot This Code?
Before attempting to fix this issue, it is important to identify the root cause. Here are the steps you can follow:
1. Look for any visible damages or loose connections in the reductant injection system or any components close to the system.
2. Scan your OBD-II reader and read any other codes that might accompany the P20E7 code.
3. Check the wiring and connections of the reductant pressure sensor to ensure that it’s working correctly.
4. Inspect the DEF filter and DEF level to ensure there’s no blockage or other issues causing obstruction in the system.
5. Test the reductant injetor and reductant dosing pump by applying voltage directly to each. This will determine if these components are working correctly.
How to Fix This Code?
Once you’ve identified the cause of the code P20E7, it’s time to fix the issue. Here are some ways to fix this code:
1. Replace the damaged reductant injector if there is a problem with it. Ensure that you choose a good quality OEM product for durability.
2. Replace the damaged reductant pressure sensor if the sensor readings are incorrect. Ensure that you choose a good quality OEM product for durability.
3. Replace the failed reductant dosing pump if it’s not functioning correctly.
4. Check and replace damaged or disconnected wiring in the system.
5. Flush the reductant injection system of your vehicle to ensure that the pipes are clean and in good condition.
FAQs on OBD-II Code P20E7 – Reductant Injection Air Pressure Too High
1. How harmful is this code to my vehicle, and how can it affect my vehicle’s performance?
Answer: This code isn’t harmful to your vehicle directly, but it can cause harmful levels of pollutants to your environment. Additionally, it can affect your vehicle’s performance, causing a decrease in fuel efficiency, and could lead to other issues that will require more costly maintenance work.
2. Do I need to get my vehicle towed to the mechanic if this code appears on my dashboard?
Answer: This code doesn’t necessarily require immediate towing to the mechanic. Still, if there are visible damages or other warning signs or any other codes, you should contact your mechanic as you may need professional help.
3. How frequently should I inspect my reductant injection system to avoid this code from occurring?
Answer: Ideally, you should inspect your reductant injection system every two years or as per the recommendations of the vehicle manufacturer.
4. Is it possible for me to troubleshoot and fix this code by myself?
Answer: While it is possible to troubleshoot and fix this code by yourself, it is important to note that the reductant injection system is a critical aspect of your vehicle’s emission system and requires specialized knowledge and tools to diagnose and repair. It is advisable to seek professional help if you’re unsure of the issue.
5. How long will it take to fix this code?
Answer: The time required to fix this code depends on the specific issue that’s causing it. It could take anywhere from 1-4 hours. It’s advisable to check with your mechanic to determine how long it will take to fix the issue.
Final Thoughts
OBD-II Code P20E7 is a common issue that occurs in modern vehicles. It is essential to identify the cause of this code and fix it as soon as possible to avoid failure and costly maintenance work. In conclusion, it’s always best to seek professional help from a trusted mechanic if you’re unsure of the issue or have any questions. These professionals will be able to guide you through the diagnosis and repair process, ensuring that your vehicle stays in good condition and continues to perform at its best.