Exhaust Temperature Sensor 2 - Voltage Above Normal
Exhaust Temperature Sensor 2 is reporting a high voltage reading.
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 sensor measures the temperature of the exhaust gases. When it reads too high, it usually means it’s malfunctioning or there’s a wiring issue.
What the computer is actually seeing
The ECM detects that the voltage from Exhaust Temperature Sensor 2 exceeds a predefined threshold, typically around 2.5V to 5V when the sensor should be at a minimum level indicating normal operating conditions.
What a healthy reading looks like
Expected voltage is between 0.5V to 2.5V during normal operation; above 2.5V is considered a fault.
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 Exhaust Temperature Sensor 2 for damage or corrosion. Decision: If defective, repair or replace them. If no issues found, continue to step 2.
- 22. Measure the voltage at the sensor connector with the engine running. Voltage should be between 0.5V and 2.5V. Decision: If voltage is above 2.5V, replace the sensor. If within range, continue to step 3.
- 33. Check for exhaust leaks around the sensor location. Decision: If leaks are found, repair them. If no leaks, sensor replacement is likely necessary.
Common causes
- Faulty Exhaust Temperature Sensor 2
- Damaged wiring or connectors
- Short circuit in the sensor circuit
- Exhaust gas leak affecting temperature readings
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's advised to address this code soon as it can affect engine performance and emissions.
Will this code come back after clearing it?
Yes, if the underlying issue isn’t fixed, the code will trigger again.
Why might this code be paired with other SPNs?
Different sensor readings can be affected by similar conditions, such as exhaust system issues.
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