Exhaust Gas Temperature Sensor Circuit High
The exhaust gas temperature sensor reading is too high.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The computer monitors the temperature of the exhaust gases. If it sees a temperature reading above a certain limit, it sets this code.
What the computer is actually seeing
The PCM detects a voltage signal greater than 4.5 volts from the exhaust gas temperature sensor, which is out of the normal range.
What a healthy reading looks like
Normal temperature readings should be between 0.5 volts (approx. 200°F) and 4.5 volts (approx. 1800°F). Anything exceeding this can trigger the code.
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.
- 1Check the sensor connector for damage and ensure it's securely connected. Is the harness intact? If not, repair or replace as necessary.
- 2Measure the voltage at the sensor connector with the engine running. Is it above 4.5 volts? If yes, the sensor or circuit is likely faulty. If no, check further wiring issues.
- 3Inspect the exhaust gas temperature sensor for physical damage. If damaged, replace it and retest the system.
- 4Look for any exhaust leaks around the sensor that could cause incorrect readings. Repair any leaks found.
Common causes
- Faulty exhaust gas temperature sensor
- Damaged wiring or connectors
- Short circuit in the sensor circuit
- Exhaust leak affecting temperature readings
Typical repair cost
$$
Related codes
Frequently asked questions
Can I still drive the vehicle?
Yes, but it’s best to fix this soon to prevent potential engine issues.
Will this code come back after clearing it?
If the underlying problem is not fixed, yes, it will reappear.
Why does this code matter?
High exhaust temperatures can cause damage to turbochargers and exhaust components.
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