What Does P00A7 Mean?
The PCM has detected a low-voltage condition on the intake air temperature sensor 2 circuit for bank 2. In NTC thermistor sensors, low voltage corresponds to low resistance, which the PCM interprets as extremely high temperature. The PCM will recognize this as implausible and set this code. This condition typically results from a short to ground in the sensor, wiring, or connector.
Common Causes
35%
Internally shorted intake air temperature sensor 2 on bank 2
30%
Signal wire shorted to ground from damaged insulation
20%
Moisture intrusion in the sensor connector causing a low-resistance path
15%
PCM internal pull-down fault on the sensor input
Diagnostic Steps
1
Check the IAT sensor 2 bank 2 PID — if it reads an extremely high temperature (e.g., 250°F+) with the engine cold, a short-to-ground condition is confirmed.
2
Disconnect the IAT sensor 2 bank 2 connector and monitor the PID — it should jump to -40°F (open circuit). If it does, the short is in the sensor. If the PID remains high, the short is in the wiring.
3
Measure the sensor resistance with the connector unplugged — it should be 2–3 kΩ at room temperature. A reading near 0 Ω confirms an internally shorted sensor.
4
With the sensor disconnected, check resistance from the signal wire (harness side) to chassis ground — infinite resistance is expected. Low resistance indicates a wiring short.
5
Inspect the harness routing for areas where wires may be pinched, abraded, or in contact with sharp metal edges, particularly near the intake manifold and engine block.
Estimated Repair Cost
$40 - $200
Parts + labor, varies by vehicle and location
The PCM has detected a low-voltage condition on the intake air temperature sensor 2 circuit for bank 2. In NTC thermistor sensors, low voltage corresponds to low resistance, which the PCM interprets as extremely high temperature. The PCM will recognize this as implausible and set this code. This con...
The most common cause of P00A7 (Intake Air Temperature Sensor 2 Circuit Low Bank 2) is: Internally shorted intake air temperature sensor 2 on bank 2
Typical repair costs for P00A7 range from $40 to $200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Driving is safe but the PCM is using a default value for bank 2 intake air temperature, which may cause slightly rich or lean conditions on that bank. Fuel economy may suffer. Repair when convenient.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P00A7 to identify the root cause.
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Quick Info
Category
Powertrain
System
Intake Air System
Difficulty
Type
Generic (SAE)
Recommended Tools
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