1. Check IAT Sensor:
- Locate the IAT sensor. It's usually in the intake hose or air filter housing.
- Disconnect the electrical connector from the sensor.
- Inspect the connector and wires for any damage or corrosion. Clean if necessary.
- Check the resistance of the sensor using a multimeter. Compare the reading with the manufacturer's specifications. If it's out of range, replace the sensor.
2. Check Sensor Circuit:
- Inspect the wiring harness that connects the IAT sensor to the engine control unit (ECU). Look for any damage, loose connections, or corrosion.
- Use a multimeter to test for continuity in the circuit between the sensor and the ECU.
- If there's no continuity, the circuit may be open or there's a poor connection. Repair or replace the wiring as needed.
3. Check ECU Connections:
- If all else seems good, you may need to check the ECU connections.
- Disconnect the ECU and inspect the terminals and connectors for any corrosion or damage.
- Clean and reconnect the ECU if necessary.
4. Reset Engine Code:
- Once the issue is resolved, clear the P0113 code by disconnecting the negative terminal of your vehicle's battery for at least 30 seconds and then reconnecting it. This will reset the ECU's memory.
5. Test Drive:
- Take the vehicle for a test drive to see if the P0113 code returns or if the truck is running properly.
If these steps don't fix the problem, it's recommended that you seek the assistance of a professional mechanic who can further diagnose and repair the issue.
