Exhaust Gas Temperature Sensor 2 - Circuit High
Exhaust Gas Temperature Sensor 2 is reading a high voltage.
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What it means (plain English)
The computer sees a voltage from the exhaust gas temperature sensor that is above the normal range, indicating a potential fault in the sensor or its wiring.
What the computer is actually seeing
The engine control unit (ECU) reads a voltage signal from Exhaust Gas Temperature Sensor 2 that's higher than 4.9 volts, which signals a fault condition.
What a healthy reading looks like
Normal operation should show between 0.5 to 4.5 volts at the exhaust gas temperature sensor under typical conditions.
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 for damage or corrosion at the exhaust gas temperature sensor. Are there any visible issues? If yes, repair them; if no, continue.
- 22. Check the voltage at the exhaust gas temperature sensor connector with the ignition on (engine off). Is the voltage over 4.9 volts? If yes, replace the sensor; if no, continue.
- 33. With the engine running, measure the voltage again. Are you still seeing above 4.9 volts? If yes, trace the wiring back to the ECU; if no, the issue may be intermittent.
Common causes
- Faulty exhaust gas temperature sensor
- Short circuit in wiring harness
- Open circuit in wiring
- Poor connector contact
- Oxidation or corrosion at the sensor terminals
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's drivable but should be addressed soon to prevent potential damage to the engine or emissions systems.
Will this code come back after clearing?
If the underlying issue isn't fixed, yes, it will likely return.
Why is this code showing with other temperature sensor codes?
Temperature sensors can fail due to similar issues, like wiring faults, leading to multiple codes being set.
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