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Home >> Oldsmobile >> 1989 >> Cutlass Calais Base, 4D Sedan, Standard >> Repair and Diagnosis >> Engine Performance >> System >> 2.3L PFI Tests W/Codes >> Diagnosis & Testing >> Code 34, Map Sensor Signal Volt Lo >> Notes

Code 34, Map Sensor Signal Volt Lo: Notes

NOTE: Test numbers refer to test numbers on diagnostic chart.
  1. The following conditions must be met to set a Code 34:
    • Engine running at operating temperature.
    • No Code 21.
    • MAP reading less than 14 kPa.
    • Engine RPM less than 1200 or TPS greater than 15.2 percent.
    • Above conditions met for 2 seconds.
  2. This test checks for sensor being at fault for low voltage, or if there is an ECM or wiring problem.
  3. This test simulates high signal voltage to check for open in circuit No. 432. If test light is bright during this test, circuit No. 432 is probably shorted to ground. If "Scan" tester reads greater than 4 volts at this test, circuit No. 416 can be checked by measuring voltage at terminal "C". Reading should be 5 volts.
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