P00E7

Code

Generic P — Powertrain

Intake Air Temperature Measurement System - Multiple Sensor Correlation Bank 2

Brand: Generic

Type: P — Powertrain

Views: UK: 36 EN: 43 RU: 28

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Page language: EN

Causes

Faulty IAT sensor (Bank 2)
Damaged or corroded wiring or connector to the Bank 2 IAT sensor
Poor ground or reference voltage for the sensor circuit
Intermittent connection or short to another circuit
Contamination or physical damage to the sensor
ECM input fault or software/calibration error

Symptoms

Check Engine Light (MIL) illuminated
Reduced fuel economy or richer/leaner-than-normal idle/fueling
Hard cold start or inconsistent warm-up behavior
Hesitation, stumble or reduced drivability under certain conditions
Incorrect air temperature readout (if displayed)
Possible failure of emissions test

What to check

Read and record DTC P00E7 plus any accompanying codes and freeze frame/live data
Compare Bank 2 IAT live values with Bank 1 IAT, ambient air temp sensor, and intake air temperature from the MAF (if present)
Visual inspection of Bank 2 IAT sensor, connector and harness for damage, corrosion, pin push-out, or contamination
Backprobe the sensor connector to confirm reference voltage (typically 5V), signal voltage, and ground with key on/engine off
Measure sensor resistance at known ambient temperatures (cold vs warm) and compare to expected characteristic
Perform wiggle test on wiring and connector while observing live data for intermittent changes

Signal parameters

Sensor type: usually NTC thermistor (resistance decreases as temperature rises)
Reference supply: typically ~5.0 V provided by ECM (confirm vehicle spec)
Signal voltage range: roughly 0.1–4.9 V depending on temp (low voltage = hot air, high voltage = cold air, vehicle-dependent)
Typical resistance examples (approximate; verify with OEM chart): ~2–5 kΩ at 20–25 °C, several hundred ohms at high temps, several kilo-ohms to tens of kilo-ohms at low temps
Expected behavior: smooth, monotonic change in voltage/resistance with temperature changes; Bank 2 should track Bank 1/ambient within a few degrees

Diagnostic algorithm

Retrieve codes and freeze-frame data; note conditions when the code set. Check for additional codes that may help (e.g., sensor circuit shorts).
With scan tool, monitor live IAT values for Bank 2, Bank 1, ambient air temp and intake-derived air temp across key conditions (cold start, warm-up, idle, light load). Look for large and persistent divergence between Bank 2 and other temps.
Visually inspect Bank 2 IAT sensor and connector for corrosion, broken wires, pin damage, contamination or heat damage. Repair or clean connector as needed.
With key ON/engine OFF, backprobe connector: verify reference voltage (≈5V), good ground, and signal voltage present. Record values.
Measure sensor resistance directly (disconnect sensor) at ambient temp and compare to expected resistance curve from OEM/aftermarket chart. If values out of spec, replace sensor.
Perform wiggle test on harness and connector while monitoring live signal for intermittent faults. Repair wiring or secure routing as required.
If wiring and connector appear good but readings remain incorrect, swap with the same sensor from the opposite bank (if identical) to see if the fault follows the sensor. If it does, replace the sensor.
If the fault stays with Bank 2 after sensor swap, trace and test the wiring harness for opens/shorts to power or ground, and repair. Check continuity to the ECM and confirm proper ECM reference/ground.
If wiring and sensor test OK, consider ECM input fault; verify with manufacturer diagnostic steps before ECM replacement.
Clear codes and perform test drive to verify repair and ensure the IAT values correlate within expected range.