Intake Manifold Temperature Sensor Circuit Low Voltage
Indicates a low voltage condition in the intake manifold temperature sensor circuit.
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What it means (plain English)
The engine control unit (ECU) is seeing lower than expected voltage coming from the intake manifold temperature sensor, suggesting a potential wiring issue or a bad sensor itself.
What the computer is actually seeing
The ECU measures input voltage from the intake manifold temperature sensor, which should be within a range of approximately 0.5 to 4.5 volts based on temperature—lower than expected signals trigger this fault.
What a healthy reading looks like
Valid input voltage from the intake manifold temperature sensor should be between 0.5V (at low temperatures) and 4.5V (at high temperatures).
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.
- 1Check the wiring and connectors going to the intake manifold temperature sensor for any visible damage or corrosion.
- 2Verify the resistance of the intake manifold temperature sensor at various temperatures; typical values should be within the manufacturer's specifications.
- 3Confirm the sensor's voltage output with a multimeter; expected readings should be between 0.5V and 4.5V under typical operating conditions.
Common causes
- Faulty intake manifold temperature sensor
- Wiring issues or short circuits in the sensor circuit
- Corroded or loose connectors at the sensor
- ECU failure
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's best to fix this soon, as low intake manifold temperature readings can affect fuel economy and emissions.
Will this code come back after clearing it?
If the underlying issue isn't fixed, the code will likely return after clearing the fault.
Why might this code appear with other codes?
This code can indicate issues related to the manifold and can appear alongside codes for other sensors that monitor air intake and temperature.
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