Exhaust Gas Temperature Sensor Circuit High - Bank 1
The exhaust gas temperature sensor for bank 1 is reporting a high input voltage.
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What it means (plain English)
The sensor that measures how hot the exhaust gases are is sending a voltage signal that's too high, indicating a possible fault.
What the computer is actually seeing
The PCM expects the exhaust gas temperature (EGT) to be between 0.5 to 4.5 volts; a reading above 4.5 volts indicates a fault in the sensor or wiring.
What a healthy reading looks like
0.5V to 4.5V for normal operation; above 4.5V indicates a problem.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Inspect the wiring and connectors to the exhaust gas temperature sensor for damage or corrosion. If found, repair or replace as needed. If not, move to step 2.
- 22. Use a multimeter to check the voltage output from the exhaust gas temperature sensor. It should be between 0.5V and 4.5V. If it's above 4.5V, replace the sensor. If it's in the correct range, proceed to step 3.
- 33. Check for any applicable TSBs (Technical Service Bulletins) related to the EGT sensor or its circuit. If a TSB exists, follow the recommended procedures. If no TSBs apply, consider the PCM may be faulty.
Common causes
- Shorted exhaust gas temperature sensor
- Damaged or frayed wiring harness
- Faulty exhaust gas temperature sensor
- Corrosion in connector terminals
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's best to fix it soon. While it may be drivable, you could experience reduced performance or increased emissions.
Will this issue come back after repairs?
If the repairs are done correctly, it shouldn't come back. Monitor the system after repairs to confirm.
Why does it pair with codes like P2036 and P2039?
These codes also relate to exhaust gas temperature sensors and indicate similar or related issues with the temperature monitoring system.
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