The P20E2 code is a diagnostic trouble code (DTC) that indicates a correlation issue between the Exhaust Gas Temperature (EGT) sensors 1 and 2. This code is part of the OBD-II system and is related to the vehicle’s emissions control system.
What Does the P20E2 Code Mean?
OBD-II Code P20E2 is defined as Exhaust Gas Temperature Sensor 1/2 Correlation. The Exhaust Gas Temperature (EGT) Sensor provides the engine control module (PCM) with the temperature of the exhaust gases entering and exiting the Selective Catalytic Reduction (SCR) system. The vehicle utilizes multiple EGT sensors to verify proper functioning and calibration. If the PCM detects an implausible signal from these sensors, it will trigger the P20E2 code.
What Causes the P20E2 Code?
- Exhaust Gas Temperature (EGT) sensor failure
- Powertrain Control Module (PCM) failure
- Wiring issues related to the EGT sensors
What Are the Symptoms of the P20E2 Code?
Drivers may notice various symptoms when the P20E2 code is triggered, including:
- Illuminated check engine light
- Increased emissions due to improper exhaust gas monitoring
- Potential decrease in engine performance
How Serious Is the P20E2 Code?
The P20E2 code is classified as a moderate severity code. While it may not pose an immediate threat to the vehicle’s safety or functionality, it is essential to address the issue promptly to prevent further complications and maintain optimal vehicle performance.
How to Diagnose the P20E2 Code?
Diagnosing the P20E2 code requires specialized equipment and knowledge. A certified mechanic should perform the following steps:
- Use an OBD-II scanner to confirm the presence of the P20E2 code and check for additional codes.
- Inspect the wiring and connections associated with the EGT sensors for signs of damage or corrosion.
- Test the EGT sensors individually to ensure they are functioning correctly and providing accurate readings.
- Evaluate the PCM for potential faults.
Common Repairs for the P20E2 Code
Repairs for the P20E2 code may include:
- Replacing faulty Exhaust Gas Temperature (EGT) sensors
- Repairing or replacing damaged wiring or connectors related to the EGT sensors
- Replacing the Powertrain Control Module (PCM) if found to be defective
How Much Does It Cost to Fix the P20E2 Code?
The cost to fix the P20E2 code can vary significantly based on the extent of the repairs needed. On average, the cost may range from $100 to $600, including diagnostic fees and parts replacement. Labor costs will depend on the shop rates in your area.
Can I Fix the P20E2 Code Myself?
While some DIY enthusiasts may be able to handle basic inspections and wiring repairs, diagnosing and fixing the P20E2 code often requires specialized tools and knowledge. If you are not experienced with automotive diagnostics, it is recommended to seek help from a certified repair shop to ensure proper handling of the issue.
