|89 3.1L VIN V MFI
||Oxygen sensor voltage stays between 0.35 and 0.55 volts for 60 seconds
when the TPS signal was above 4%. The engine had been running for at least
||Coolant temperature sensor signal indicates a temperature of over 275°
F for 3 seconds.
||Coolant temperature sensor signal indicates a temperature colder than
-38° F for at least 20 seconds.
||TPS voltage was above 4.3 volts for 10 seconds when engine was running
and air flow was less than 17 gm/sec.
||TPS voltage was under 0.25 volts for 4 seconds when the ignition was on.
||Manifold air temperature sensor signal showed an air temperature of -31°
F for 10 seconds after engine had been running for 4 minutes.
||Engine speed was between 2200 and 4400 RPM and transmission was not in
park or neutral and TPS was less than 2% for 3 seconds.
||Manifold air temperature sensor signal showed an air temperature over
293° F for 3 seconds when vehicle speed was greater than 3 MPH and engine
had been running for 8 minutes.
||Quad-driver sense voltage showed a low voltage when battery voltage should
be present, or the sense voltage showed battery voltage when a low voltage
should be present.
||The ECM opens each EGR control valve during deceleration and monitors
the change in manifold vacuum. The code is set when the change in manifold
vacuum is outside the normal range.
||MAP sensor voltage was too high for 4.8 seconds when throttle angle was
less than 2%.
||MAP sensor voltage was too low for 1 second when engine speed was under
600 RPM, or MAP sensor voltage was too low for 1 second when engine speed
was over 600 RPM and throttle angle was above 20%.
||Faulty or incorrect MEM-CAL.
||Knock sensor signal was either above 3.5 volts or below 1.5 volts for
at least 0.5 seconds.
||Oxygen sensor voltage was under 0.2 volts for at least 60 seconds of closed
||Oxygen sensor voltage was over 0.7 volts for 50 seconds in closed loop
operation with a throttle angle between 3% and 45%.
||ECM sees a battery voltage of more than 17.1 volts for 2 seconds.
||Fuel pump voltage was less than 4 volts for 0.4 seconds.
||Vehicle gear commanded by ECM did not match actual gear selected.
||A/C pressure sensor voltage was either above 4.9 volts or below 0.1 volts
for at least 5 seconds.