P2199

DTC P2199: IAT Sensor 1, 2 Correlation

1. Turn the ignition switch OFF.
2. Disconnect the IAT sensor 1 2P connector and remove IAT sensor 1.
3. Disconnect the IAT sensor 2 2P connector and remove IAT sensor 2.
4. Cool the sensors to under 77 °F (25 °C).
5. Connect the 2P connectors to the IAT sensors.
6. Turn the ignition switch ON (II).
7. Check IAT SENSOR-1 and IAT SENSOR-2 in the DATA LIST with the HDS.

Is the temperature difference between IAT-1 sensor and IAT-2 sensor 45 °F (25 °C) or more?

YES - Go to step 8.

NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at IAT sensor 1, IAT sensor 2 and the PCM.

8. Replace the sensor that has the largest difference from room temperature.
9. Turn the ignition switch ON (II).
10. Reset the PCM with the HDS.
11. Do the PCM idle learn procedure.
12. Turn the ignition switch OFF.
13. Let the vehicle sit for more than 8 hours.
14. Start the engine.
15. Check for Temporary DTCs or DTCs with the HDS.

Are any Temporary DTCs or DTCs indicated?

YES - If DTC P2199 is indicated, check for poor connections or loose terminals at IAT sensor 1, IAT sensor 2 and the PCM, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.

NO - Go to step 16.

16. Monitor the OBD STATUS for DTC P2199 in the DTCs MENU with the HDS.

Does the screen indicate PASSED?

YES - Troubleshooting is complete.

NO - If the screen indicates FAILED, check for poor connections or loose terminals at IAT sensor 1, IAT sensor 2, and the PCM, then go to step 1. If the screen indicates NOT COMPLETED, go to step 12.