|93 5.7L VIN J
||Oxygen sensor voltage stays between 0.35 and 0.55 volts for 60 seconds.
Engine was at normal operating temperature and had been running for at least
2 minutes after start with a throttle angle above 5%.
||Coolant temperature sensor signal indicates a temperature of over 266°
||Coolant temperature sensor signal indicates a temperature colder than
||DIS fault line voltage was low for 2 seconds when EST was disabled.
||TPS voltage was above 2.5 volts for 2 seconds when the engine was running,
or when the TPS was above 4.8 volts at any time.
||TPS voltage was under 0.23 volts when the engine was running.
||Intake air temperature sensor signal showed an air temperature below -31°
F for 1 seconds after the engine has been running for 4 minutes.
||Vehicle speed was less than 3 MPH when engine speed was between 900 and
4400 RPM and throttle position angle was less than 2% for 4 seconds.
||Intake air temperature sensor signal showed an air temperature over 302°
F for 3 seconds after the engine has been running for 1 minutes.
||Cam pulse was missing on the first pass through the internal ECM self
test of the cam sensor, or for any 3-minute period.
||EGR open command did not change the fuel mixture when the command was
given during off idle operation. EGR opening should cause the mixture to
be slightly richer because of the low oxygen content of the exhaust gas.
EGR position signal is also monitored to verify EGR movement.
||MAP sensor signal voltage was too high (low vacuum) for 0.4 seconds when
throttle opening was under 20% with an engine speed higher than 1250 RPM.
||MAP sensor signal voltage was too low (high vacuum) when engine speed
was under 700 RPM, or when TPS was greater than 20% with an engine speed
above 700 RPM.
||MAP sensor signal showed a low vacuum for 1 second when engine speed was
more than 1500 RPM and throttle angle was less than 15%.
||The DIS module did not sense the correct EST signal from ECM for 10 consecutive
||The EST signal was not received by ECM for 0.5 seconds when EST mode was
enabled or when bypass mode was enabled.
||Knock sensor voltage was either above 3.62 volts or below 1.44 volts for
24 seconds or ECM did not receive the knock sensor signal.
||Left oxygen sensor voltage was under 0.2 volts for 50 seconds of closed
||Left oxygen sensor voltage was over 0.75 volts for 30 seconds when the
throttle angle was between 2.7% and 20% in closed loop operation.
||Engine oil temperature was below -36° F after engine had been running
for 30 minutes.
||ECM detected a battery voltage either above 17.1 volts or below 8 volts.
||Fuel pump voltage was less than 2 volts for 1.5 seconds since the last
reference pulse was received.
||ECM detected a lean oxygen sensor voltage for 2 seconds during the power
enrichment modes of operation.
||Vacuum sensor voltage was either above 4.8 volts or below 0.46 volts.
||Vacuum sensor voltage was between 0.76 and 4.89 volts when secondary port
throttle valves were commanded closed, or the vacuum sensor voltage was
below 1.7 volts when the secondary port throttle valves were commanded open.
||Engine oil temperature sensor showed an oil temperature above 284° F after
the engine had been running at least 30 minutes.
||Right oxygen sensor was open showing a steady voltage between 0.35 and
0.55 volts for 60 seconds after the engine had been running for at least
||Right oxygen sensor voltage was below 0.2 volts for 50 seconds of closed
||Right oxygen sensor voltage was above 0.75 volts for 30 seconds of closed
loop operation when the throttle angle was above 20% or below 2.7%.
||A/C pressure sensor circuit was either open or shorted showing a voltage
below 0.5 volts or above 3.4 volts for 10 seconds.