1986 2.8L Carburetor, VIN X |
12 |
ECM did not receive distributor reference pulses when cam pulses
were being received. |
13 |
Oxygen sensor voltage stays between 0.35 and 0.55 volts for 60
seconds during closed loop operation after the engine had been running for 4 minutes and
the throttle angle was above 4%. |
14 |
Coolant temperature sensor was shorted showing a high temperature
after engine had been running for 2 minutes. |
15 |
Coolant temperature sensor was open showing a low temperature after
engine had been running for 5 minutes. |
21 |
TPS was open showing low voltage. |
22 |
TPS voltage was under 0.2 volts for 3 seconds when the engine was
running. |
23 |
Mixture control solenoid circuit was either open or shorted. |
24 |
Vehicle speed sensor was out of range after vehicle had been at road
speed for 2 minutes. |
32 |
Barometric pressure sensor circuit was low. |
34 |
MAP sensor or vacuum sensor was open or shorted. |
35 |
Idle speed control switch circuit was shorted showing a high TPS
reading for over 5 seconds. |
41 |
ECM did not see any distributor reference pulses. |
42 |
The EST signal did not change when the ECM applied bypass voltage to
the ignition module. |
43 |
The ESC knock signal lasted too long causing the EST signal to be
retarded. |
44 |
Oxygen sensor was lean during closed loop operation after engine had
been running for 2 minutes. |
45 |
Oxygen sensor was rich during closed loop operation after engine had
been running for 2 minutes. |
51 |
PROM error. |
53 |
EGR valve vacuum was incorrect. |
54 |
Mixture control solenoid circuit was shorted and/or ECM is faulty. |
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. |