What Does P00AB Mean?
The PCM has detected that the intake air temperature sensor 1 on bank 2 is providing readings that fall outside the expected performance range for the current operating conditions. The sensor is electrically functional but its values don't correlate properly with other engine parameters such as coolant temperature, engine load, ambient temperature, and vehicle speed. This rationality check failure suggests the sensor is reading incorrectly or there is an issue affecting the air temperature at that location.
Common Causes
30%
Degraded intake air temperature sensor 1 on bank 2 with drifted calibration
25%
Heat soak from engine or exhaust components near the sensor location
20%
Air leak in the bank 2 intake tract affecting temperature readings
15%
Contamination on the sensor element reducing thermal accuracy
10%
High-resistance wiring issue affecting sensor accuracy without a hard fault
Diagnostic Steps
1
Compare IAT sensor 1 bank 2 PID to IAT sensor 1 bank 1 and any other intake temperature sensors during steady-state driving — they should be within 10°F/6°C under comparable conditions.
2
Monitor the sensor reading from cold start through warm-up — it should show a gradual, smooth increase. An abnormally fast rise, slow rise, or stagnant reading indicates a problem.
3
Remove and inspect the sensor element for oil, soot, or coolant contamination that could insulate the thermistor and cause slow or inaccurate response.
4
Check for intake manifold leaks on bank 2 with a smoke machine — hot unmetered air entering near the sensor would cause abnormally high readings.
5
Verify there are no missing or damaged heat shields near the sensor location that could expose it to radiant heat from exhaust components.
Estimated Repair Cost
$60 - $300
Parts + labor, varies by vehicle and location
The PCM has detected that the intake air temperature sensor 1 on bank 2 is providing readings that fall outside the expected performance range for the current operating conditions. The sensor is electrically functional but its values don't correlate properly with other engine parameters such as cool...
The most common cause of P00AB (Intake Air Temperature Sensor 1 Circuit Range/Performance Bank 2) is: Degraded intake air temperature sensor 1 on bank 2 with drifted calibration
Typical repair costs for P00AB range from $60 to $300, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive. The engine management will be slightly less than optimal. The driver may notice marginally reduced fuel economy or emissions test failure. No immediate safety concern.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P00AB 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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