Exhaust Gas Temperature Sensor 2 Circuit High
High voltage detected in Exhaust Gas Temperature (EGT) Sensor 2 circuit.
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What it means (plain English)
The exhaust gas temperature sensor 2 measures how hot the gases are after they leave the engine. If it sees a voltage that's too high, it thinks the sensor is malfunctioning, which can affect emissions and engine performance.
What the computer is actually seeing
The engine control module (ECM) monitors the EGT sensor 2 output, expecting a voltage generally between 0.5 to 2.5 volts. A reading above 2.5 volts is flagged as a fault.
What a healthy reading looks like
Normal EGT sensor output is typically between 0.5V (cold) to 2.5V (hot) under normal operating 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 EGT sensor 2. Look for damaged insulation, corrosion, or loose connections. If any issues found, repair or replace.
- 22. Measure the voltage at the EGT sensor 2 connector with the engine running. If voltage exceeds 2.5 volts, proceed to step 3. If under 2.5 volts, replace the sensor.
- 33. Replace the EGT sensor 2 and clear the fault codes. Monitor the system to see if the code reappears.
Common causes
- Short circuit in EGT sensor 2 circuit
- Faulty EGT sensor 2
- Damaged wiring or connectors
- Open circuit in the sensor loop
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's moderate severity; you can drive, but address it soon to avoid possible emissions issues.
Will the code come back after clearing?
If the fault isn't resolved, the code will likely return after driving the vehicle.
Why does this code show up with other SPNs?
Codes often appear together due to related issues in the exhaust management system, especially if sensors are affected by the same wiring or conditions.
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