P0110 Code - Intake Air Temperature Circuit Malfunction

What Does P0110 Mean?

P0110 is a general code for a problem with the Intake Air Temperature (IAT) electrical circuit sensor sending incorrect voltage input signals to the Engine Control Unit (ECU). This means the voltage input to the ECU is incorrect, which then means that it is not in the correct range and causes the ECU to incorrectly manage the fuel system.

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What are the common causes of P0110 ?

Potential causes of the P0110 DTC include:

• IAT sensor shifted out of airflow
• Bad IAT sensor
• Shorted to ground or open on signal circuit to IAT
• Open in ground circuit to IAT
• Poor connection at IAT (backed out terminals, broken connector locks, etc.)
• Bad PCM

How do you troubleshoot P0110 ?

Pack the connector cavity with dielectric silicone compound (same stuff they use for light bulb sockets and spark plug wires) and reassemble. Oxygen sensors signal the engine management computer the amount of oxygen present in the exhaust, which is used in determining and controlling the fuel ratio. Look for damage to the tank indicating impact that may have damaged the fuel pump or sender.

Process Tips

Diagnostic trouble code P0110 is not difficult to diagnose and repair. Thus, it always pays to have a qualified technician to look after your vehicle should this error code arise.

Diagnosing this code requires the engine to be in good running shape, without unmetered air entering the engine. If other codes that relates to misfiring condition, lean running or air entering the engine is present, then you must first fix those error codes before
P0110.

Fortunately, P0110 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

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