Recommended Procedure

WARNING: This page is about a different car, the 2003 Ford Pickup, 2003 Ford F550 Super Duty, 2003 Ford F450 Super Duty, 2003 Ford Excursion, and 2003 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Engine must be at normal operating temperature.

The engine must be at operating temperature. Install scan tool. Turn A/C off. Access ICP PID on scan tool and monitor ICP pressure. Operate the engine at 670 RPM. If engine does not stabilize, disconnect the ICP sensor. If low idle speed stabilizes with the ICP sensor disconnected, the problem is most likely in the ICP sensor circuit. See TEST Q: INJECTION CONTROL PRESSURE SENSOR under SYSTEM TESTS in SELF-DIAGNOSTICS - 6.0L DIESEL. If RPM does not stabilize, reconnect the sensor and see TEST 15: INJECTION PRESSURE REGULATOR TEST . This test should be performed with engine at normal operating temperature.

NOTE: ICP PID reading will default to 725 psi (4999 kPa) when ICP sensor is disconnected.