Test Procedure

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2005 Ford RV Cutaway, 2005 Ford Pickup, 2005 Ford F550 Super Duty, 2005 Ford F450 Super Duty, and 2005 Ford Excursion. However, it is still accessible from the selected car via links, so may be relevant.

AW1 PRELIMINARY DIAGNOSIS FOR DTC P2199

Retrieve and record all DTCs.
Record the freeze frame data.

Is DTC P2199 present?

Yes	No
For DTC P2199 with other DTCs present, REFER to DIAGNOSTIC SUBROUTINES - 6.0L DIESEL DTC chart for appropriate diagnosis. For DTC P2199 only, GO to AW2.	UNABLE to duplicate the condition. CHECK for a loose connection, and damaged or corroded terminals. WIGGLE the harness attempting to recreate the fault. REPAIR as necessary. REFER to SYMPTOM CHARTS - 6.0L DIESEL if a driveability concern exists.

AW2 DIAGNOSTIC TROUBLE CODE (DTC) P2199

Possible causes:
- IAT sensor
- IAT2 sensor
- PCM
Key OFF.
Cold soak the vehicle overnight.
Connect the diagnostic tool.
Key ON, engine OFF.
Access the IAT and IAT2 PIDs.

Are both temperature readings within 10°F of ambient temperature?

Yes	No
GO to AW3.	INSTALL a new sensor for the one that is not within range. CLEAR the DTCs. REPEAT the self-test.

AW3 CHECK KOER IAT AND IAT 2 VALUES

Key ON, engine running.
Access the IAT and IAT2 PIDs.

Are the sensor values within 40°C (104°F) of each other?

Yes	No
UNABLE to duplicate the concern. Cold soak the vehicle overnight and REPEAT the self-test. If no concern is present, INSTALL a new PCM. CLEAR the DTCs. REPEAT the self-test.	INSTALL a new IAT sensor. CLEAR the DTCs. REPEAT the self-test.