Exhaust Gas Temperature Sensor 2 Circuit High
The exhaust gas temperature sensor 2 is reading higher than expected.
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What it means (plain English)
The computer sees that the temperature sensor for the exhaust gas is reporting a temperature that's too high, likely due to a wiring issue or a bad sensor itself.
What the computer is actually seeing
The engine control module (ECM) expects the exhaust gas temperature to be within a specific range during operation. If sensor 2 reports a voltage above 4.9 volts, this triggers the P2033 code.
What a healthy reading looks like
Exhaust gas temperature should typically be around 200-800°F (93-427°C) during normal operation; over 1,500°F (815°C) signals an issue.
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 connector for exhaust gas temperature sensor 2 for damage or corrosion. Decision: If yes, repair the wiring. If no, proceed to step 2.
- 22. Test the voltage at the sensor's connector with the ignition on but engine off. Expected value: 0.5-4.5 volts. Decision: If out of range, check wiring to the ECM. If in range, proceed to step 3.
- 33. Use a scan tool to monitor the exhaust gas temperature during engine operation. Expected value: Between 200-800°F (93-427°C). Decision: If exceeds 800°F (427°C) under normal conditions, replace the sensor. If normal range, check the ECM for faults.
Common causes
- Faulty exhaust gas temperature sensor
- Wiring harness short or damage
- Poor connection at sensor or ECM
- Exhaust leaks affecting sensor reading
Typical repair cost
$$$ (150 - 600)
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's drivable but not recommended for long distances as it may lead to further damage.
Will this problem come back after fixing?
If wiring and connections are secured, and the sensor is replaced, it should not return.
Why does this code appear with related codes?
These codes often indicate multiple exhaust temperature sensors having issues, which can be linked.
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