Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD1994TAURUS V6-182 3.0L DOHC SHOREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONPINPOINT TESTSX - CONSTANT CONTROL RELAY MODULE (CCRM)X165 - CHECK FOR VPWR TO LOW SPEED FUEL PUMP RELAY
1994 Ford Taurus V6-182 3.0L DOHC SHO
X165 - Check For VPWR to Low Speed Fuel Pump Relay
1994 Ford Taurus V6-182 3.0L DOHC SHOSECTION X165 - Check For VPWR to Low Speed Fuel Pump Relay
DTC Diagnostic Trouble Code (DTC) 557 indicates a low speed fuel pump primary circuit failure.
Possible causes:
- Open or shorted circuit.
- Damaged Low Speed Fuel Pump (LFP) relay.
- Damaged Powertrain Control Module (PCM).
- Disconnect LFP relay.
- Key "ON", engine "OFF".
Low Fuel Pump (LFP) Relay Connector:
- Measure voltage between the VPWR circuit at the LFP relay vehicle harness connector and the battery negative post.
- Key "OFF".
- Was voltage greater than 10.5 volts?
Yes -- Go to X166. X166 - Check LFP Relay
No -- Service open in VPWR circuit between Constant Control Relay Module (CCRM) and LFP relay. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.