Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer found a problem with the temperature sensors in the exhaust system on one side of the engine. They aren't agreeing on the temperature, which could mean one is broken.
The P20E5 code is triggered when the Engine Control Module (ECM) detects that the readings from Exhaust Gas Temperature Sensor 1 and Sensor 2 on Bank 2 do not match within a specified range.
Exhaust Gas Temperature Sensors are used to monitor the temperature of the exhaust gases leaving the engine. Bank 2 refers to the side of the engine opposite to Bank 1. The ECM uses these sensors to ensure the exhaust system is operating efficiently. If the readings from the two sensors do not correlate, it could indicate a faulty sensor or an issue with the exhaust system.
• Check Engine Light illuminated
• Poor fuel economy
• Possible engine performance issues
• Faulty exhaust gas temperature sensor
• Wiring issues or poor connections
• Exhaust leaks affecting sensor readings
ECM: Engine Control Module
OBD-II: On-Board Diagnostics, Second Generation
Bank 2: The side of the engine opposite to Bank 1, typically the side without cylinder 1.
• Use an OBD-II scanner to confirm the code.
• Visually inspect the wiring and connections of the exhaust gas temperature sensors.
• Check the sensors for proper operation using a multimeter.
• Replace the faulty exhaust gas temperature sensor.
• Repair or replace damaged wiring or connectors.
• Fix any exhaust leaks that might be affecting sensor readings.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Ford F-150
• Chevrolet Silverado
• Dodge Ram 1500
• Regularly inspect and maintain exhaust system components.
• Ensure sensors are clean and free of debris.
• Check for and repair exhaust leaks promptly.
Sensor Issue
• Have the vehicle inspected by a professional if you are not experienced with car repairs.
• Do not ignore the Check Engine Light as it may lead to more severe issues.
Sensor-related issues may be covered under the vehicle's emissions warranty. Check with your manufacturer.
This code has been more common in vehicles with higher mileage or those that frequently tow heavy loads.
Moderate – While the vehicle may still be drivable, it is important to address the issue to prevent further damage and ensure efficient operation.
Driving with a faulty exhaust system can lead to increased emissions and may not comply with local regulations.
• Engine at operating temperature
• Vehicle running at a steady speed
The exhaust gas temperature sensors are located in the exhaust system, typically before and after the catalytic converter on the side of the engine referred to as Bank 2.
Q: Can I drive with a P20E5 code?
A: While it may be possible to drive, it's not recommended as it can lead to further issues and increased emissions.
Q: How do I know which sensor is faulty?
A: A professional diagnosis using a multimeter and OBD-II scanner can determine which sensor is not functioning correctly.
High-End · Full-system diagnostics
A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.
Network faults often require full-system access instead of a generic code reader alone.
View on Amazon
Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
View on Amazon
Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.
Fitment Required · Vehicle-fitment part
Relevant when catalyst-efficiency or emissions faults persist after proper diagnosis.
Catalyst-efficiency faults sometimes point toward converter problems after proper testing.
Catalytic converters are highly vehicle-specific and should not be purchased by code alone.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.