Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means the car's computer thinks two temperature sensors in the exhaust system aren't agreeing with each other. It's like when two thermometers show different temperatures, and the car wants them to match.
The P20E2 code is triggered when the readings from Exhaust Gas Temperature Sensors 1 and 2 on Bank 1 do not correlate or match within a specified range.
Exhaust Gas Temperature Sensors are used to monitor the temperature of the exhaust gases. The Engine Control Module (ECM) uses this data to optimize engine performance and emissions. If the readings from these sensors are not within an expected range, the ECM will set the P20E2 code.
• Check Engine Light is on
• Potential decrease in fuel efficiency
• Possible increase in emissions
• Faulty exhaust gas temperature sensor
• Wiring issues such as shorts or opens in the sensor circuit
• ECM software issues or faults
ECM: Engine Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Use an OBD-II scanner to confirm the code
• Inspect the wiring and connectors for damage
• Test the exhaust gas temperature sensors for proper operation
• Replace the faulty exhaust gas temperature sensor
• Repair or replace damaged wiring or connectors
• Update or reprogram the ECM if necessary
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Ford F-150
• Chevrolet Silverado
• Dodge Ram
• Regularly inspect exhaust system components
• Ensure proper maintenance of vehicle's electrical system
• Use quality fuel to prevent sensor contamination
Sensor Issue
• Have the vehicle inspected by a professional if the Check Engine Light is on
• Do not ignore the warning as it may affect emissions and fuel efficiency
Check with the vehicle manufacturer for warranty coverage on emissions-related components.
This code has been more prevalent in vehicles with advanced emissions systems and is often associated with sensor reliability issues.
Moderate – It's important to address this issue to ensure optimal vehicle performance and emissions compliance.
Operating a vehicle with malfunctioning emissions components may be illegal in some regions and could result in fines.
• Engine at operating temperature
• Vehicle driven under normal conditions
The exhaust gas temperature sensors are located in the exhaust system, typically before and after the catalytic converter on Bank 1.
Q: Can I drive with a P20E2 code?
A: While the vehicle may still be drivable, it's best to address the issue to avoid potential emissions problems.
Q: How do I reset the Check Engine Light after fixing the issue?
A: You can reset the light using an OBD-II scanner, or it may turn off automatically after several drive cycles if the issue is resolved.
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Universal · Digital multimeter
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Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
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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.
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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.