Retrieving Codes

1989 Eagle Summit LX, 1.6 Y, AutomaticSECTION Retrieving Codes
NOTE: Oxygen sensor memory is erased when ignition switch is turned off. To diagnose oxygen sensor, drive vehicle a good distance and keep engine running.
  1. Signals will appear on voltmeter as long and short 12-volt pulses. Long pulses represent tens; short pulses represent ones. For example, 4 long pulses and 3 short pulses indicate code 43. See DIAGNOSTIC FAULT CHARTS. After recording abnormal code(s), perform necessary repair.
  2. After repair, turn ignition off and disconnect negative battery cable for 15 seconds to erase ECU memory. Reconnect power supply and repeat self-diagnostics to confirm repair.
Fig 1: Self-Diagnostic Connector Locations & Terminal Identification
G120233Courtesy of CHRYSLER MOTORS.
RENDER: 1.0x

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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.