The P20E5: Exhaust Gas Temperature Sensor 1/2 Correlation Bank 2 fault code indicates an incorrect correlation between the readings of exhaust gas temperature sensors 1 and 2 in Bank 2. This can result in improper exhaust gas temperature monitoring, affecting emissions control and engine performance. The issue may be caused by faulty sensors or wiring problems in the exhaust temperature monitoring system.
P20E5 – Quick Overview
Code | Information |
---|---|
Meaning | P20E5: Exhaust Gas Temperature Sensor 1/2 Correlation Bank 2 |
Is it serious? | Yes, this can lead to improper exhaust temperature readings, affecting emissions control and overall vehicle performance. |
Possible causes | – Incorrect correlation between temperature sensors 1 and 2 in Bank 2 – Faulty sensors – Wiring issues |
How to diagnose? | – Compare readings from temperature sensors 1 and 2 in Bank 2 – Test each temperature sensor – Check wiring between sensors |
P20E5 Meaning
The P20E5 fault code signifies that the exhaust gas temperature readings from sensors 1 and 2 in Bank 2 are not correlating properly. This discrepancy can cause the ECM (Engine Control Module) to make incorrect adjustments to the exhaust system, potentially leading to inefficient emissions control and affecting overall engine performance. This issue may stem from faulty sensors, wiring problems, or improper sensor placement.
Step-by-step diagnostic guide
Action | Description | Tools Needed |
---|---|---|
Check for Other Codes | Use an OBD-II scanner to check for any additional related codes that may provide more context for the correlation issue. | OBD-II Scanner |
Compare Readings from Sensors 1 and 2 | Use a diagnostic tool to compare the readings from exhaust gas temperature sensors 1 and 2 in Bank 2, and ensure they match manufacturer specifications. | Diagnostic Tool |
Test Each Temperature Sensor | Use a multimeter to test the functionality of each temperature sensor to ensure they are operating within the correct resistance range. | Multimeter |
Inspect Sensor Wiring | Inspect the wiring between the sensors for signs of loose connections, damaged wires, or corrosion that could affect the readings. | Flashlight, Multimeter |
Repair or Replace Faulty Sensors/Wiring | If a faulty sensor or damaged wiring is found, repair or replace the components as necessary to restore proper correlation. | Replacement Sensor, Wiring Kit |
Clear the Code and Test Drive | After completing repairs, clear the code using an OBD-II scanner and test drive the vehicle to ensure the problem has been resolved. | OBD-II Scanner, Vehicle Manual |
Recheck for Codes | After the test drive, rescan the vehicle to ensure the P20E5 code does not return. | OBD-II Scanner |

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