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Home >> Jeep >> 1996 >> Cherokee Classic, Part Time, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 4.0L >> Diagnostic Trouble Code (DTC) Identification >> Test TC-118A - Fuel System Rich
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Test TC-118A - Fuel System Rich

NOTE: For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in this section.
  1. FUEL SYSTEM RICH DTC sets if Powertrain Control Module (PCM) senses fuel system is running too rich on 2 sequential trips. Possible causes are: defective catalytic converter, defective PCM, engine wear, defective fuel injectors, defective MAP sensor, defective upstream Oxygen Sensor (O2S), defective fuel pressure regulator, or defective connector terminals or connector wires. Go to next step.
  2. Perform TEST NTC-8A . If test fails, perform appropriate repair procedure indicated in test. Test is complete. If test passes, perform TEST TC-118B .
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