Faulty intake air temperature sensor 2 on bank 2; Damaged or corroded wiring harness to the sensor; Short to ground in the signal circuit; Open circuit in the sensor ground or signal wire; Poor electrical connection at the sensor connector; Failed engine control module (ECM) driver circuit (less common)

DTC codes / P00xx · Fuel and air metering and auxiliary emission controls / P00A7

P00A7Intake Air Temperature Sensor 2 Circuit Low Bank 2

Q: What does code P00A7 mean?

Intake Air Temperature Sensor 2 Circuit Low Bank 2. P00A7 means the engine computer has detected a low-voltage signal on the intake air temperature sensor 2 circuit for bank 2, which is the sensor that measures the temperature of the air entering the second bank of cylinders. The computer expects a voltage within a specific range and sees a value below the minimum threshold, indicating a short to ground, an open circuit, or a sensor fault.

P00A7 means the engine computer has detected a low-voltage signal on the intake air temperature sensor 2 circuit for bank 2, which is the sensor that measures the temperature of the air entering the second bank of cylinders. The computer expects a voltage within a specific range and sees a value below the minimum threshold, indicating a short to ground, an open circuit, or a sensor fault.

SystemPowertrain

Code typeGeneric (all makes)

SeverityLow

Fix difficultyIntermediate

AreaFuel and air metering and auxiliary emission controls

Symptoms you may notice

Illuminated check engine light, often with no other symptoms
Rough idle or poor driveability when the engine is cold
Reduced fuel economy or incorrect air-fuel mixture
Hesitation or stumble on acceleration
Possible increased emissions or failed emissions test
In rare cases, the engine may run rich or lean depending on the failure mode

Common causes, most likely first

Faulty intake air temperature sensor 2 on bank 2
Damaged or corroded wiring harness to the sensor
Short to ground in the signal circuit
Open circuit in the sensor ground or signal wire
Poor electrical connection at the sensor connector
Failed engine control module (ECM) driver circuit (less common)

How to diagnose and fix it

Scan all modules for stored and pending codes to confirm P00A7 is the only relevant fault
Inspect the sensor connector and wiring for corrosion, chafing, or loose pins
Measure sensor resistance with a multimeter and compare to the manufacturer's temperature-resistance chart
Check the signal circuit for a short to ground using a wiring diagram and multimeter
Verify reference voltage and ground at the sensor connector with the key on
Replace the intake air temperature sensor 2 if resistance is out of specification
Repair or replace damaged wiring and clear codes, then road-test to confirm the repair

What the low-voltage code really tells you

A low-voltage reading on an intake air temperature sensor circuit often means the signal wire is shorted to ground, not that the sensor itself has failed, so inspect the harness before replacing parts.
Some vehicles use a combined mass air flow and intake air temperature sensor, and a fault in the shared connector or internal circuit can set this code even when the temperature-sensing element is fine.
The ECM may substitute a default intake air temperature value when this code sets, which can mask driveability symptoms and make the fault appear intermittent.
Corrosion inside the sensor connector from road splash or engine wash is a frequent cause that a visual inspection alone may miss without disconnecting and examining the pins.
Bank 2 intake air temperature sensor 2 is often located in the air intake tube or manifold after the throttle body, and a cracked or disconnected vacuum hose near it can cause false readings.

Can I keep driving with P00A7?

The vehicle is generally safe to drive with this code because the engine computer substitutes a default temperature value, but avoid heavy load or towing until the fault is repaired to prevent poor fuel economy or emissions issues.

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.