What it means
A fault is detected in the Intake Air Temperature Sensor 2 circuit for Bank 2. The code does not by itself establish the sensor's location or effect on mixture.
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 2 measures the air temperature at the location assigned to the second intake-temperature sensor for Bank 2. The control module monitors its electrical circuit and sets P00A5 when it detects a fault, without identifying whether the sensor, wiring, connector, or module is responsible.
Common causes
Most likely first.
- Intake air temperature sensor 2 failed
- Open, short, or damaged sensor wiring
- Loose or corroded connector
- Control module fault
Symptoms
- Check engine light on
- Poor fuel economy
- Rough idle or hesitation
- Hard starting in some conditions
How to diagnose it
- Read freeze-frame data and compare the reported Sensor 2 temperature for Bank 2 with ambient temperature after a cold soak to spot an implausible reading.
- Use live data to watch the Bank 2 Sensor 2 temperature as the engine warms and check whether it changes smoothly.
- Inspect the Sensor 2 connector and nearby Bank 2 wiring for looseness, corrosion, damage, or contact with hot or moving parts.
- With the wiring diagram, check the sensor circuit for opens, shorts, and poor connections, comparing results with the manufacturer's specification.
- Test the Sensor 2 element and circuit separately; consider a control-module fault only after the sensor and wiring pass their checks.
Common fixes
- Reconnect and secure the Bank 2 Sensor 2 connector.
- Clean corroded terminals or repair damaged connector pins.
- Repair an open, short, or damaged section of Sensor 2 wiring.
- Replace the Bank 2 Sensor 2 if its test results are outside the manufacturer's specification.
- Repair or replace the control module only if circuit and sensor tests identify it as faulty.
Can I keep driving?
If the engine runs normally and the warning light is steady, a short, gentle drive may be possible, but arrange diagnosis soon because incorrect temperature data can affect fuel economy and emissions. Avoid hard acceleration if it hesitates or runs roughly.
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.