Engine Exhaust Temperature Sensor 1
This code indicates a problem with the Engine Exhaust Temperature (EET) sensor 1.
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 Engine Exhaust Temperature sensor 1 measures how hot the exhaust gases are. If it's not working, the engine computer doesn't know how well the engine is running, which can cause bad performance or emissions issues.
What the computer is actually seeing
The engine control module (ECM) monitors the EET sensor 1 input voltage range. It should usually vary between 0.5V and 4.5V based on the exhaust temperature.
What a healthy reading looks like
Expect EET sensor 1 output voltage to be between 0.5V (cold exhaust, ~200°F) and 4.5V (hot exhaust, ~1600°F).
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. Visually inspect the wiring and connections to Engine Exhaust Temperature sensor 1 for damage or corrosion. If damaged, repair or replace as necessary. Decision: Good wiring? Go to step 2; Bad wiring? Fix wiring.
Common causes
- Faulty Engine Exhaust Temperature sensor 1
- Wiring issues or poor connections to the sensor
- ECM software glitch or failure
Typical repair cost
$$
Related codes
Frequently asked questions
Can I drive the vehicle with this code?
Yes, but it may affect engine performance and emissions. It's best to address it soon.
Will this issue come back after clearing the code?
It may if the underlying problem isn't fixed, like a faulty sensor or wiring issue.
Why is this related to other SPN codes?
They often come from similar systems or sensors, so issues can affect multiple codes.
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 →