Intake Manifold Temperature Sensor Circuit - Voltage Above Normal
This code indicates a high voltage reading from the intake manifold temperature sensor.
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 sees that the temperature sensor in the intake manifold is sending a voltage that’s too high, which usually happens when the sensor is faulty or the wiring is damaged.
What the computer is actually seeing
The engine control module (ECM) monitors the voltage from the intake manifold temperature sensor. If it detects voltage higher than the normal range (typically above 4.5 volts), it triggers this code.
What a healthy reading looks like
Normal voltage readings from the intake manifold temperature sensor should be between 0.5 volts (cold) and 4.5 volts (maximum temperature).
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 intake manifold temperature sensor wiring for any visible damage or corrosion. Decision: Is the wiring intact? Yes: Go to step 2. No: Repair wiring and retest.
- 22. Check the electrical connector at the sensor for proper connection and any signs of corrosion. Decision: Is the connection good? Yes: Go to step 3. No: Clean or repair the connector and retest.
- 33. Measure the voltage at the intake manifold temperature sensor with the ignition on but the engine off. Expected value: 0.5 to 4.5 volts. Decision: Is the voltage within this range? Yes: Replace the sensor. No: Check the ECM and wiring integrity.
- 44. After fixes, clear the code and take the vehicle for a test drive to see if the code returns.
Common causes
- Faulty intake manifold temperature sensor
- Wiring harness issues or shorts
- Poor connections at the sensor
- Faulty ECM
Typical repair cost
$$
Related codes
Frequently asked questions
Can I still drive the vehicle with this code?
Yes, it's drivable but expect reduced performance and potential for further issues if not addressed soon.
If I fix the wiring, will the code come back?
If there's no other underlying fault, fixing the wiring should resolve it.
Why did this happen in conjunction with another code?
Multiple codes can indicate multiple issues or the same underlying problem affecting different systems.
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