Diagnostic Aids

WARNING: This page is about a different car, the 2002 Ford Pickup and 2002 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

Enter this test only when all steps under QUICK TEST have been successfully completed and engine still does not start or if directed here from another test or chart. This test is only intended to diagnose:

Compuvalve.
Harness circuits.
Powertrain Control Module (PCM).

Fuel Rail Temperature (FRT) sensor is integral to compuvalve. It is mounted in fuel stream and is supplied a 5-volt VREF signal from compuvalve. DTCs P0182 and P0183 are set when compuvalve receives a FRT signal less than -79°F (-62°C) or a signal more than 260°F (127°C). Possible causes for these faults are:

FRT sensor circuit open.
FRT sensor circuit shorted to VPWR.
FRT sensor circuit shorted to GND.
Damaged FRT sensor or compuvalve.
Engine overheating.
Coolant lines or coolant flow through the alternative fuel system.

NOTE: During bi-fuel diagnostics, intermittent failures are possible. Perform wiggle test and tap lightly on relays during testing. Ensure vehicle has LPG before continuing with diagnostics.