What it means
A general circuit fault is detected for intake air temperature sensor 3 on bank 2.
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 measures incoming air temperature for the engine control module. This code indicates a general electrical fault in the bank 2 sensor 3 circuit, which can result from a failed sensor, an open circuit, a short, or poor connector contact.
Common causes
Most likely first.
- Failed intake air temperature sensor 3
- Damaged wiring or poor connector contact
- Open or short in the sensor circuit
Symptoms
- Check-engine light on
- Reduced engine performance or power
- Poor fuel economy
How to diagnose it
- Save freeze-frame data and compare bank 2 sensor 3 live data with other intake temperature readings to see whether it is fixed, implausible, or missing.
- Locate the bank 2 sensor 3 using the vehicle service information and inspect its connector and wiring for damage, corrosion, or poor seating.
- Check the sensor circuit for opens and shorts using the wiring diagram and the manufacturer's test procedure.
- Verify connector terminal contact and the circuit's supply and ground where applicable to the vehicle design.
- Test the bank 2 sensor 3 itself against the manufacturer's specification before deciding whether the sensor or wiring is at fault.
Common fixes
- Reconnect or repair poor contact at the bank 2 sensor 3 connector.
- Repair damaged wiring or an open or short in the sensor circuit.
- Replace intake air temperature sensor 3 on bank 2 if it fails the specified test.
Can I keep driving?
A short, gentle drive is generally reasonable if the engine runs normally, but avoid heavy loads if power is reduced. The faulty bank 2 temperature input can affect engine performance and fuel economy; stop if the engine runs roughly or loses substantial power.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.