1991 3.8L Fuel Injection, VIN L |
13 |
Oxygen sensor voltage stays between 0.35 and 0.55 volts for 30
seconds when the TPS signal was above 0.55 volts. The engine had been running for at least
40 seconds with an engine temperature above 110° F. |
14 |
Coolant temperature sensor signal indicates a temperature of over
284° F for 0.4 seconds after the engine had been running for at least 10 seconds. |
15 |
Coolant temperature sensor signal indicates a temperature colder
than -36° F for at least 4 seconds after the engine had been running for 2 seconds. |
16 |
Charging system voltage was above 17 volts or below 9 volts for 10
seconds. |
17 |
ECM detected incorrect number of spark reference pulses to fuel
control reference pulses for 80 crank revolutions. |
21 |
TPS voltage was above 0.8 volts for 5 seconds when engine was
running and air flow was less than 15 gm/sec, or the TPS voltage was over 4.8 volts at any
time. |
22 |
TPS voltage was under 0.2 volts for 4 seconds when the ignition was
on. On Bonneville, Le Sabre, and Park Avenue the TPS voltage was between 0.48 and 1.3
volts for 30 seconds with engine speed between 1300 and 2100 RPM and vehicle speed between
50 and 60 MPH. |
23 |
Inlet air temperature sensor signal showed an air temperature of
40° F for 0.4 seconds (On Regal the temperature was -31° F). |
24 |
Vehicle speed sensor signal showed less than 3 MPH for 2 seconds
when engine speed was greater than 3000 RPM and transmission has not been in park or
neutral for more than 4 seconds. Or vehicle speed goes from above 18 MPH to 0 in less than
2 seconds without applying brake. |
25 |
Inlet air temperature sensor signal showed an air temperature of
over 218° F for 5 seconds when vehicle speed was greater than 35 MPH. |
26 |
Quad-Driver sense voltage shows a low voltage when battery voltage
should be present, or if the sense voltage shows battery voltage when a low voltage should
be present for at least 5 seconds when the engine was running. |
27 |
2nd gear switch was closed or grounded for 10 seconds when vehicle
was in 4th gear, or 2nd or 4th gear switch was open when engine was first started. |
28 |
3rd gear switch was closed or grounded for 10 seconds when vehicle
was in 4th gear, or 3rd or 4th gear switch was open when engine was first started. |
29 |
4th gear switch was closed or grounded for 10 seconds when vehicle
was in 4th gear, or 4th gear switch was open when engine was first started. |
31 |
PRNDL indicates a gear other than park or neutral for 13 seconds for
3 consecutive startups when ignition was on, engine was off and vehicle speed was 0. Or
the PRNDL status indicators (A, B, C, P) showed an incorrect combination of Lo and Hi for
more than 10 seconds. |
34 |
There was no MAF signal for over 4 seconds while engine was running. |
36 |
Transmission solenoid "B" has failed in the Off position
which caused transmission to be in 4th when 1st gear was desired, or solenoid
"B" failed in the On position which caused transmission to be in 1st when 4th
gear was desired. |
38 |
Vehicle went from 35 MPH (for 10 seconds) to 0 MPH 5 times without a
TCC brake input signal. |
39 |
The Torque Converter Clutch portion of the brake switch was
inoperative for 30 seconds causing vehicle speed ratio to be outside of its window of
operation. |
41 |
Cam sensor signal was not received by PCM for the last 2 seconds
while engine was running. |
42 |
The EST signal did not change when the ECM applied bypass voltage to
the ignition module. |
43 |
Knock sensor signal was either above 3.5 volts or below 1.5 volts
for at least 20 seconds. |
44 |
Oxygen sensor voltage was under 0.25 volts for up to 4 1/2 minutes
of closed loop operation. |
45 |
Oxygen sensor voltage was over 0.75 volts for 2 minutes in closed
loop operation with a throttle angle between 0.6 and 1.9 volts. |
47 |
Momentary loss of power to Body Computer Module (BCM). |
51 |
MEM-CAL error. |
58 |
Security system pass key signal was out of range when the ignition
was turned to On or Start position. |
61 |
Cruise vent solenoid was shorted, grounded, or open for 1/2 second
or longer. |
62 |
Cruise VAC solenoid was shorted, grounded, or open for 1/2 second or
longer. |
63 |
EGR flow was incorrect. EGR solenoid did not work properly. |
64 |
EGR flow was incorrect. EGR solenoid did not work properly. |
65 |
Cruise servo position sensor was shorted, grounded, or open. |
66 |
A/C compressor signal lasted less than 1.5 seconds for 10
consecutive cycles. |
67 |
Cruise switch was open between Cruise Engage and the PCM, or the
Set/Coast switch was closed for too long, or the Resume/Accel switch was closed for too
long, or the Cruise switch was open between the PCM and Brake switch after the vehicle had
made 5 stops of 10 seconds or longer, or any of the cruise switches have been shorted to
voltage. |
68 |
Servo Position sensor from the PCM to the cruise servo had a
position above 12% for 1 1/2 seconds. |
69 |
A/C head pressure switch circuit was shorted for the first 5 seconds
of engine run time. |
The Diagnostic Codes and Explanations are derived
from Manufacturer supplied Technical Data. WesTech does not guarantee the accuracy of this
Information nor can it be held liable for providing it. |