P00AE
Intake Air Temperature Sensor 1 Circuit Intermittent/Erratic Bank 2P00AE is a generic OBD-II powertrain diagnostic trouble code: Intake Air Temperature Sensor 1 Circuit Intermittent/Erratic Bank 2. It is logged by the engine control unit when the powertrain monitor detects that a specific fault threshold has been exceeded — typically resulting in the malfunction-indicator lamp (MIL / check-engine light) being illuminated.
What P00AE means
Code P00AE is stored when the powertrain control module (PCM) detects an intermittent or erratic signal from the Bank 2 Intake Air Temperature (IAT) Sensor 1 circuit — meaning the voltage drops in and out of the normal operating range unpredictably rather than holding a steady out-of-range value. The IAT sensor is a thermistor that feeds a continuously sampled voltage to the PCM; the PCM uses this signal together with mass airflow (MAF) data to calculate the correct air/fuel ratio and ignition timing. Intermittent faults are typically caused by loose connector pins, a chafed harness that makes contact intermittently, or a sensor whose internal element is beginning to fail. Because the signal is only occasionally aberrant, the fault can be difficult to reproduce and may clear itself temporarily. However, every excursion outside the PCM's plausibility window triggers a counter; once the counter reaches its threshold the MIL is commanded on. Drivability complaints are often subtle — slight hesitation, minor surging, or a brief flat spot on acceleration — making customer description the first diagnostic clue. Thorough wiggle-testing of the harness while monitoring live data is essential for isolating this fault.
Common causes
Most-frequently reported root causes when P00AE is logged.
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1
Loose or corroded Bank 2 IAT sensor connector pins that make intermittent electrical contact
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2
Chafed or pinched IAT signal wire intermittently shorting to ground or losing continuity when the engine vibrates
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3
Failing IAT sensor with a thermistor element that drops signal unpredictably as it ages
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4
IAT sensor connector left partially unseated after air filter or intake maintenance
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5
Broken intake air inlet pipe or torn air boot causing intermittent hot-air ingestion that the PCM flags as implausible
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6
Marginal MAF sensor producing conflicting airflow data that rationalises against IAT and sets an intermittent fault
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7
PCM terminal corrosion or spread pins at the IAT signal input causing a floating voltage
Symptoms drivers notice
How to diagnose P00AE
A typical diagnostic flow when this code is present.
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1
Retrieve all stored codes and freeze-frame data; record the IAT temperature value logged at the time of the fault
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2
Perform a detailed visual inspection of the Bank 2 IAT sensor, connector, and entire harness for chafing, pinching, heat damage, or loose terminals
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3
With a scan tool monitoring live IAT sensor voltage on Bank 2, perform a firm wiggle-test of the harness and connector while watching for voltage spikes or dropouts
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4
Inspect the intake air inlet pipe and air boot for cracks or loose clamps that could admit hot underhood air intermittently
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5
Test IAT sensor resistance at various temperatures and compare to the manufacturer's resistance-temperature curve; an erratic or drifting reading indicates a failing sensor
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6
Verify PCM terminal integrity at the IAT signal input; spread or corroded terminals cause intermittent high-impedance faults
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7
After repairs, clear codes, perform a full drive cycle with live data logging, and confirm stable IAT signal before returning the vehicle
Related powertrain codes
Frequently asked questions
Why does P00AE come and go without any apparent fix?
Intermittent faults are often caused by a marginal connection that makes and breaks with temperature or vibration. The code may clear when the connector seats fully from heat expansion, then return when the engine cools. A thorough wiggle-test of the harness under live data monitoring is the most effective way to reproduce and locate the fault.
Is P00AE more difficult to diagnose than a steady circuit fault?
Yes. Because the signal is only occasionally out of range, standard static resistance tests often pass. Live data monitoring and physical manipulation of the wiring harness while watching the IAT voltage in real time are essential to catch the fault.
Can a clogged air filter cause P00AE?
A severely clogged air filter can restrict airflow enough to create an implausible relationship between IAT and MAF readings, which may contribute to an intermittent rationality fault. Inspecting and replacing the air filter is a low-cost first step.
Will P00AE affect automatic transmission shift quality?
In most vehicles the transmission control module shares engine load data derived partly from IAT-corrected MAF readings. Severe IAT excursions can cause slightly hesitant or abrupt shifts, although this is a secondary effect and usually minor.
Disabling P00AE in software
RaceTune can permanently disable P00AE — and any other OBD-II diagnostic trouble code — on every ECU family we support. The monitor is disabled inside the ECU itself, so the fault stops being logged: the warning light stays off and the engine never enters limp mode for this code. The change is tied to your exact software version.
Software modifications affect emissions compliance and are not road-legal in many jurisdictions. RaceTune service files are intended for motorsport, off-road, and export use.
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