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Home >> Dodge and Ram >> 1998 >> Caravan Base, 2.4 B >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 2.4L >> DTC Test >> Test TC-119A - Fuel System Lean

Test TC-119A - Fuel System Lean

NOTE: Very low fuel level could cause this Diagnostic Trouble Code (DTC) to be set. Ensure fuel tank is at least 1/4 full before proceeding.
  1. If vehicle did not run out of fuel before coming in, go to next step. If vehicle ran out of fuel before coming in, use scan tool to clear Diagnostic Trouble Codes (DTCs) from Powertrain Control Module (PCM). Perform TEST VER-5A - ROAD TEST FOR OBD-II TROUBLE CODES .
  2. This DTC may be stored in Powertrain Control Module (PCM) when PCM determines fuel system is running too lean for at least 2 trips. If this condition exists, Malfunction Indicator Light (MIL) on instrument panel will illuminate and remain on, but goes off if conditions required to set DTC are not found on the following trips.
  3. Possible causes are: defective wiring or connectors, defective catalytic converter, defective fuel pump or fuel pump relay, defective fuel filter, defective injectors, defective fuel pressure regulator, defective MAP sensor, defective upstream oxygen sensor, defective PCM, defective ignition system, contaminated fuel or engine mechanical problems. Go to next step.
  4. Using scan tool, check for stored DTCs. If no DTCs exist that could cause a lean condition, go to next step. If DTCs exist that could cause a lean condition, refer to appropriate test for the specified DTC.
  5. Start engine and warm engine until engine coolant temperature is at least 180°F (82°C). Allow engine to idle for at least 20 seconds after reaching normal operating temperature.
  6. Check for exhaust leaks between engine and upstream oxygen sensor. Upstream oxygen sensor is mounted on the exhaust manifold. If no exhaust leaks exist, go to next step. If exhaust leaks exist, repair as necessary. Perform TEST VER-5A - ROAD TEST FOR OBD-II TROUBLE CODES .
  7. Using scan tool, monitor upstream oxygen sensor state for at least 20 seconds. If oxygen sensor is not switching between lean-center-rich at least 2 times within 20 seconds, go to next step. If oxygen sensor is switching between lean-center-rich at least 2 times within 20 seconds, conditions required to set DTC are not present at this time. Perform TEST VER-5A - ROAD TEST FOR OBD-II TROUBLE CODES .
  8. With engine running, using scan tool, read the short and long term adaptive memory values. If any of the long term adaptive memory value is between +20 percent and +32 percent, go to next step. If any of the long term adaptive memory value is not between +20 percent and +32 percent, conditions required to set DTC are not present at this time. Perform TEST VER-5A - ROAD TEST FOR OBD-II TROUBLE CODES .
  9. Shut engine off. Turn ignition on with engine off. Using scan tool, actuate fuel system test. Visually inspect injectors for leaks.
  10. If no leaks exists, stop fuel system test. Perform TEST TC-119B - FUEL SYSTEM LEAN . If leaks exists, stop fuel system test. Replace leaking injector(s) as necessary. Perform TEST VER-5A - ROAD TEST FOR OBD-II TROUBLE CODES .
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