P00F0: Intake Air Temperature Sensor 3 Circuit High Bank 2

What it means

The intake air temperature sensor 3 circuit signal on bank 2 is above the expected range.

At a glance

• Usually lights the check-engine light
• Affects emissions; the car can fail an emissions test

How it works

Intake air temperature sensor 3 on bank 2 reports air temperature to the engine control module. This code sets when the bank 2 sensor 3 circuit signal is above the module's expected range, often because an open signal wire makes the input appear abnormally high.

Common causes

Most likely first.

1. Signal wire open
2. Connector pins corroded - high contact resistance
3. Supply wire pinched against B+ source

Symptoms

• Check-engine light on
• Reduced engine performance or power
• Poor fuel economy

How to diagnose it

1. Record freeze-frame data and compare bank 2 sensor 3 live data with other intake temperature readings and ambient conditions.
2. Inspect the bank 2 sensor 3 connector and wiring for an open signal wire, corrosion, loose pins, or heat and abrasion damage.
3. Check whether the supply wire is pinched against battery voltage and inspect the harness routing for contact with power sources.
4. Test signal and supply circuit continuity and check for shorts using the vehicle wiring diagram.
5. Test the sensor response against the manufacturer's specification before replacing the sensor.

Common fixes

• Repair an open or damaged bank 2 sensor 3 signal wire.
• Clean or repair corroded terminals and restore a secure connector fit.
• Repair a supply wire that is pinched against battery voltage.
• Replace intake air temperature sensor 3 on bank 2 if it fails testing.

Can I keep driving?

If the engine runs smoothly, drive gently and avoid hard acceleration or towing until the circuit is checked. The high bank 2 signal can cause reduced power and poor fuel economy; stop if the engine develops serious drivability problems.