Faulty intake air temperature sensor 2 on bank 2; Damaged or corroded wiring or connector at the sensor; Open or short circuit in the sensor signal or ground circuit; Intake air leak between the sensor and the throttle body; Failed mass airflow sensor or other sensor sharing the same reference voltage; Powertrain control module software issue or internal fault

DTC codes / P00xx · Fuel and air metering and auxiliary emission controls / P00A5

P00A5Intake Air Temperature Sensor 2 Circuit Bank 2

Q: What does code P00A5 mean?

Intake Air Temperature Sensor 2 Circuit Bank 2. P00A5 indicates that the powertrain control module has detected an out-of-range signal on the intake air temperature sensor 2 circuit for bank 2, which monitors the temperature of the air entering the second bank of cylinders. The computer compares the sensor voltage to expected values and flags the code when the signal falls outside the normal operating range for a calibrated period.

P00A5 indicates that the powertrain control module has detected an out-of-range signal on the intake air temperature sensor 2 circuit for bank 2, which monitors the temperature of the air entering the second bank of cylinders. The computer compares the sensor voltage to expected values and flags the code when the signal falls outside the normal operating range for a calibrated period.

SystemPowertrain

Code typeGeneric (all makes)

SeverityLow

Fix difficultyIntermediate

AreaFuel and air metering and auxiliary emission controls

Symptoms you may notice

Illumination of the check engine light, often with no other noticeable symptoms
Rough idle or stumbling when the engine is cold
Reduced fuel economy due to incorrect air density calculations
Hesitation or lack of power during acceleration
In rare cases, a no-start condition or stalling when the engine is cold
Possible default to a fixed intake air temperature value, causing minor driveability changes

Common causes, most likely first

Faulty intake air temperature sensor 2 on bank 2
Damaged or corroded wiring or connector at the sensor
Open or short circuit in the sensor signal or ground circuit
Intake air leak between the sensor and the throttle body
Failed mass airflow sensor or other sensor sharing the same reference voltage
Powertrain control module software issue or internal fault

How to diagnose and fix it

Scan all modules for stored and pending codes, and record freeze-frame data to understand when the fault occurs
Visually inspect the intake air temperature sensor 2, its connector, and wiring for damage, corrosion, or loose pins
Measure the sensor resistance with a multimeter and compare to the manufacturer's temperature-resistance chart
Check the sensor reference voltage and ground circuit integrity with a multimeter or oscilloscope
Inspect the intake tract for leaks or blockages that could affect sensor readings
If the sensor and wiring test good, verify the powertrain control module is not misinterpreting the signal by checking for software updates or known issues
Replace the faulty sensor or repair the wiring as needed, then clear codes and verify the repair with a test drive

What the intake air temp code hides

A P00A5 code often sets because of a poor connection at the sensor pigtail, not a failed sensor, so wiggle-testing the harness while watching live data can reveal the real culprit.
On some vehicles, the intake air temperature sensor 2 is integrated into the mass airflow sensor or manifold absolute pressure sensor, so replacing the entire assembly may be necessary even if only the temperature element fails.
The code can be triggered by a faulty thermostat or cooling system issue that causes intake air temperatures to stay abnormally low or high, misleading the diagnostic path.
A dirty or contaminated sensor element from oiled air filters or crankcase ventilation issues can skew readings without completely failing, setting the code intermittently.
Technicians sometimes overlook that bank 2 intake air temperature sensor 2 may share a ground with other sensors, so a bad ground can set multiple codes including this one.

Can I keep driving with P00A5?

The vehicle is generally safe to drive with this code because the engine management system substitutes a default temperature value, but you may notice slightly reduced performance or fuel economy. Avoid heavy towing or aggressive driving until the fault is repaired, and address the issue promptly to prevent secondary codes.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.