2004 Ford Truck Explorer ERRATIC FUEL GAUGE OPERATION

By | December 27, 2013

Download 2004 Ford Truck Explorer 4WD V8-4.6L SOHC VIN W MIL ON WITH DTC P0463 OR ERRATIC FUEL GAUGE OPERATION FORD: 2004-2007 Explorer MERCURY: 2004-2007 Mountaineer This article supersedes TSB 06-16-7 to update the Service Procedure. ISSUE Some 2004-2007 Explorer 4dr/Mountaineer vehicles may exhibit the malfunction indicator lamp (MIL) on with diagnostic trouble code (DTC) P0463 or an erratic fuel gauge concern. This could be from sulphur contamination in the fuel, causing an open or high resistance on the fuel sender card. ACTION Follow the Service Procedure steps to correct the condition. SERVICE PROCEDURE 1. For vehicles with customer symptom of erratic fuel gauge operation (with no MIL on), proceed to Step 1a. For vehicles with a customer symptom including the MIL on, proceed to Step 1b. If unable to verify the concern, do not continue with this TSB. a. Follow the appropriate pinpoint test (PPT) for “Fuel Gauge Inaccurate” in Workshop Manual (WSM), Section 413-01. If PPT test results lead to fuel pump module replacement, proceed to Step 2. If PPT test results isolate any problem other than fuel pump module replacement, repair as indicated and do not continue with this TSB. b. Install diagnostic scan tool to retrieve DTCs. If DTC P0463 is retrieved, proceed to Step 2. If DTC P0463 is not retrieved, this TSB does not apply, follow normal WSM diagnostics. 2. Remove fuel tank per WSM, Section 310-01. 3. Remove fuel pump assembly from fuel tank per WSM, Section 310-01. See Figure 1 (Chart) to determine if a kit (contains a fuel level sensor assembly, a wire harness and heat shrink tube) or fuel pump assembly is required for repair. For vehicles that can be serviced with a kit go to Step 4. For vehicles that require fuel pump assembly replacement, go to Step 12. 4. Remove the fuel level sensor assembly (sender card/float rod assembly) from the fuel pump assembly per WSM, Section 310-01. 5. Detach electrical connector from fuel pump housing (Figure 2). 6. Remove wiring harness from the fuel pump assembly flange by depressing the retaining fingers on the harness connector at bottom of flange and pushing upward out of flange (Figure 3). 7. Install new wiring harness by feeding wires through flange hole and inserting harness connector into flange until an audible click is heard. Check for proper retention.

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