Exhaust Gas Temperature Sensor 2 - Voltage Above Normal
The exhaust gas temperature sensor 2 is reporting a voltage reading that's 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)
Inside the engine's computer, there's a sensor that measures how hot the exhaust gases are. When that sensor sends back a voltage higher than expected—like above 5 volts—it's telling the computer something's wrong with the exhaust temperature or the sensor itself.
What the computer is actually seeing
The computer expects the exhaust gas temperature sensor 2 to output between 0.5 volts (cold) and 2.5 volts (normal operating range). Anything above 5 volts indicates a potential fault or short circuit.
What a healthy reading looks like
Exhaust Gas Temperature Sensor 2 output should be between 0.5V to 2.5V. A reading over 5V triggers this 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.
- 11. Inspect the wiring and connector for Exhaust Gas Temperature Sensor 2; look for fraying, damage, or corrosion. - If damaged, repair or replace the wiring/connector.
- 22. Measure the output voltage of Exhaust Gas Temperature Sensor 2 with a multimeter; turn the ignition on (engine off). - If voltage is above 5 volts, go to step 3; if normal (0.5V - 2.5V), the code could be a false trigger; clear the code and recheck after operation.
- 33. Replace the Exhaust Gas Temperature Sensor 2 and clear any fault codes; retest the system. - If code returns, inspect the wiring again for shorts.
Common causes
- Shorted sensor wiring
- Faulty exhaust gas temperature sensor 2
- Poor connection at the sensor plug
- Excessive heat damage to sensor or wiring
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's best to fix the issue soon, as it could affect engine performance and emissions.
Will this problem come back after I repair it?
If the wiring and sensor are properly fixed, this issue shouldn't return.
Why does this code pair with SPN 5468?
SPN 5468 indicates the first exhaust gas temperature sensor; issues commonly affect both sensors.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →