Temperature Sensor 1 Circuit Failure
The vehicle's body control module detected a fault in the temperature sensor circuit.
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 body control module (BCM) is trying to read the temperature from a sensor but can't get a proper signal, which could mean the sensor is bad or there's an issue with the wiring.
What the computer is actually seeing
BCM sees values outside of the expected range for the temperature sensor, usually above 5 volts or below 0.5 volts when the sensor is healthy.
What a healthy reading looks like
Normal operating voltage for the temperature sensor should be around 2.5V to 3.5V when the sensor is in the correct temperature range.
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 temperature sensor wiring and connector for visible damage or corrosion. Fix any found issues. Decision: If damage is found, repair it and clear the code. If no damage, go to step 2.
- 22. Measure the voltage at the temperature sensor connector with the key on and engine off. Expected value: 2.5V to 3.5V. Decision: If outside this range, replace the sensor. If within range, go to step 3.
- 33. Check the ground connection for the temperature sensor. Use a multimeter to test continuity from the sensor ground to battery ground. Decision: If no continuity, repair the ground. If continuity is good, go to step 4.
- 44. Connect a scan tool and check for any related codes stored in the BCM. Decision: If there are other codes, troubleshoot those as they may be related. If none, go to step 5.
- 55. If all tests are passed and no related codes exist, consider reprogramming the BCM as a last step.
Common causes
- Faulty temperature sensor
- Wiring issues (shorts or breaks)
- Corroded connectors
- BCM software issue
- Grounding problems
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, it is generally safe to drive, but repairs should be made soon to ensure proper functionality of body systems reliant on the temperature sensor.
Will the code come back after clearing it?
If the underlying issue isn't fixed (like a bad sensor or wiring), then yes, the code can return.
Why might this code pair with other codes?
Multiple codes can indicate a common fault, like a wiring issue affecting multiple sensors or modules.
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