Temperature Sensor 2 Voltage High
The voltage from temperature sensor 2 is 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)
The computer is reading a voltage from temperature sensor 2 that is higher than normal, which usually means the sensor is faulty or there's a short in the wiring.
What the computer is actually seeing
The engine control module (ECM) expects voltage readings from the temperature sensor to be between 0.5V and 4.5V. Anything above 4.5V triggers this fault code.
What a healthy reading looks like
Normal temperature sensor voltage: 0.5V (cold) to 4.5V (hot).
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 wiring and connectors for damage, corrosion, or loose connections. If damaged, repair or replace as necessary.
- 22. Measure the voltage at the temperature sensor connector with the engine running. Expect 0.5V to 4.5V. If above 4.5V, sensor may be faulty.
- 33. Check the temperature sensor by removing it and testing its resistance. Compare resistance to manufacturer specs at various temperatures. If resistance is out of spec, replace the sensor.
- 44. If the wiring and sensor check out, use a multimeter to test for shorts between the sensor wires and ground. If shorts are found, trace and repair the wiring.
- 55. Clear the fault code and drive the vehicle to see if it returns. If it does, further diagnose the ECM or look for other underlying issues.
Common causes
- Faulty temperature sensor 2
- Short circuit in the wiring harness
- Open circuit in the wiring
- Corroded or damaged connector
- Electrical interference from other components
Typical repair cost
$$ - $$$ (sensor $50-$200 + labor)
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's best to check the sensor and wiring first; continued driving may lead to overheating or engine performance issues.
Will this code come back after clearing?
If the root cause isn't fixed, yes, the code will likely return.
Why does this code sometimes pair with other codes?
Multiple codes can signal an issue with the same system or sensor group, especially if they rely on shared wiring or components.
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