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Home >> Jeep >> 2005 >> Wrangler X, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 627 (Powertrain Diagnostic Procedures - DRIVEABILITY - Gas - Symptom & Diagnostic Tests (DTCS P0031 To P1899)) >> DRIVEABILITY - Gas - Diagnostic Tests >> P0171-1/1 Fuel System Lean; P0174-2/1 Fuel System Lean (Gas - Except NGC) >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2004 Dodge Pickup and 2004 Dodge Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Refer to VERIFICATION TESTS for appropriate verification test procedures.
  1. GOOD TRIP EQUAL TO ZERO
  2. FUEL PRESSURE OUT OF SPECS
  3. RESTRICTED FUEL SUPPLY LINE
  4. FUEL PUMP INLET STRAINER PLUGGED
  5. FUEL PUMP MODULE
  6. O2 SENSOR
  7. O2 SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
  8. O2 SENSOR HEATER OPERATION
  9. TP SENSOR VOLTAGE GREATER THAN 0.92 OF A VOLT WITH THROTTLE CLOSED
  10. TP SENSOR SWEEP
  11. MAP SENSOR OPERATION
  12. ECT SENSOR OPERATION
  13. ENGINE MECHANICAL PROBLEM
  14. FUEL FILTER/PRESSURE REGULATOR
  15. INTERMITTENT CONDITION
  16. PCM