DTC P00A600 – Intake Air Temperature Sensor 2 Circuit Bank 2 Range/Performance.

✅ What P00A600 Means

This code indicates that the Intake Air Temperature Sensor 2 (IAT2) on Bank 2 is sending a signal to the ECM that is outside the expected range.
This is a range/performance code – NOT necessarily an open/short circuit, but the temperature reading does not match engine conditions.

IAT2 is usually located after the turbo/intercooler (called Charge Air Temp or CAC Temp sensor on some vehicles).

🔧 Common Causes

Electrical

Loose / corroded / damaged IAT2 connector

Broken wiring, high resistance, poor ground

Sensor internal resistance drift (sensor aging)

Airflow / Mechanical

Boost leak near intercooler or intake pipe

Clogged or leaking charge-air cooler

Excessive intake temperature due to turbo overheating

Dirty sensor element

PCM / Software

Rare: PCM logic issue or requires calibration update

🛠️ Step-by-Step Diagnostic Procedure

1. Visual Inspection (Very Important)

⭐ Check IAT2 sensor connector (Bank 2 side)
⭐ Look for oil, dirt, corrosion, water intrusion
⭐ Check wiring harness along intercooler piping
⭐ Tug test the wires for internal break
⭐ Check for loose clamps or cracks in:

Intercooler hoses

Intake piping

Boost pipes

2. Scan Data Monitoring

Using a scanner, check IAT1 and IAT2 readings:

Normal Engine-Off Reading

IAT1 ≈ Ambient (room temperature)

IAT2 ≈ Ambient (or 1–5°C higher)

If reading is abnormal

-40°C or -50°C → Sensor circuit open

+120°C to +150°C → Sensor circuit short to ground

Reading fluctuates → intermittent wiring fault

Compare Bank 1 vs Bank 2 IAT2 values (if dual system). If one bank is different by >15°C at idle → sensor/wiring issue.

3. Test the IAT2 Sensor

(Requires multimeter)

Check Resistance (Cold Engine ~25°C)

Typical thermistor values (approx):

2–3 kΩ @ 25°C

300–500 Ω @ 80°C

If resistance does not match spec → replace sensor.

4. Wiring Tests

A. Check 5V reference

Key ON:

Pin 1 → 5V

Pin 2 → Ground

If 5V missing → open or PCM problem.

B. Signal wire test

Wiggle harness while watching scan tool.
If reading jumps = wiring break inside insulation.

5. Check for Airflow Problems

Range/performance codes often come from airflow faults, not sensor failure.

Inspect:

Intercooler blockage

Boost leak (pffff sound, oily pipes)

Turbo over-temperature

Aftermarket air filters causing turbulence

6. Clear the Code & Road Test

Run vehicle under boost (2000–3500 RPM).
Monitor IAT2 temp.

If code returns → replace the sensor or repair wiring.

✅ Most Common Fixes in Workshops

1. Replace IAT2 sensor (many cases)
2. Fix wiring/connector
3. Repair boost leak or hose crack
4. Clean charge-air cooler & pipes
5. ECM update (occasionally)

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