Code
P00AE
Generic
P — Powertrain
Intake Air Temperature Sensor 1 Circuit Intermittent Bank 2
Views:
UK: 27
EN: 32
RU: 23
AI status
Completed
Completed
100%
Causes
- Damaged or chafed IAT sensor wiring harness (bank 2)
- Loose, corroded, or contaminated connector at the IAT sensor
- Failed or intermittent IAT sensor (thermistor)
- Poor ground or reference voltage to the sensor
- Intermittent short to voltage or short to ground in the circuit
- Water intrusion or corrosion at the sensor/connector
Symptoms
- Check Engine Light (MIL) illuminated intermittently or steady
- Scan tool shows erratic or jumping intake air temperature readings for bank 2
- Engine may run rich/lean transiently, causing hesitation or rough idle (intermittent)
- Reduced fuel economy or drivability complaints under some conditions
- Possible difficulty starting in extreme temperatures
What to check
- Retrieve freeze frame and live data with a scan tool; note when code sets and IAT readings when fault occurs
- Visually inspect sensor and harness on bank 2 for damage, corrosion, or contamination
- Wiggle test harness/connectors while monitoring live IAT value to reproduce intermittent behavior
- Backprobe sensor connector to verify reference voltage (usually ~5 V), signal and ground continuity
- Measure sensor resistance vs ambient temperature (if accessible) and compare to specifications
- Check for water/intrusion and secure connector; inspect ECM connector pins if applicable
Signal parameters
- IAT is typically an NTC thermistor: resistance decreases as temperature rises
- Typical signal voltage range: roughly 0.5–4.5 V across cold-to-hot range (varies by vehicle)
- Typical resistance at ~20–25 °C: commonly 1–20 kΩ depending on design (refer to vehicle spec)
- Reference (sensor supply) voltage commonly ~5 V and a solid ground circuit required
Diagnostic algorithm
- Read freeze frame and pending counts; note operating conditions when intermittent occurred.
- Visually inspect IAT sensor (bank 2) and wiring for damage, rubbing, or corrosion; repair any obvious issues.
- With scan tool connected, monitor IAT1 (bank 2) live data and wiggle harness/connectors to try to reproduce intermittent behavior.
- Backprobe connector: verify reference voltage (usually ~5 V) and good ground while observing signal voltage changes.
- If reference/ground are good but signal is erratic, disconnect sensor and measure sensor resistance vs ambient temperature; compare to spec to confirm sensor health.
- Perform continuity and resistance checks from sensor connector to PCM for open/shorts and intermittent resistance. Repair or replace wiring/connector as needed.
- If wiring and sensor check good, replace sensor and retest. Clear codes and road test.
- If problem persists after sensor and wiring repair, inspect PCM connector pins for damage; consider PCM testing or replacement only after all circuit repairs exhausted.
Likely causes
- Loose or corroded connector at IAT sensor (bank 2)
- Chafed/broken wire or intermittent short in harness to sensor
- Faulty IAT sensor element
- Poor ground or reference voltage issue
Fault status
Status
Intermittent fault detected in Intake Air Temperature Sensor 1 circuit (Bank 2). Circuit produced unstable or out-of-range readings; possible open/short/intermittent connection.
Repair difficulty: Medium
Diagnostic time: 0.5-2 hours
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