GM GM 86-88 2.8L VIN 9 MFI Trouble Code Info

GM

86-88 2.8L VIN 9 MFI
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 2 minutes and the throttle angle was above 4%.
14 Coolant temperature sensor signal indicates a temperature of over 275° F for 3 seconds.
15 Coolant temperature sensor signal indicates a temperature colder than -47° F for 3 seconds.
21 TPS voltage was above 2.5 volts for 5 seconds when the MAP sensor signal showed manifold vacuum above 15 pounds or TPS signal voltage was over 4.5 volts.
22 TPS voltage was under 0.2 volts for 3 seconds when the engine was running.
23 Manifold air temperature sensor signal showed an air temperature of -31° F for 3 seconds after the engine has been running for 8 minutes.
24 Vehicle Speed Sensor Sensor/Circuit.When engine speed was between 1400 and 3600 RPM and throttle angle was less than 2%, the MAP sensor signal showed low voltage (High manifold vacuum) for at least 3 seconds.
25 Manifold air temperature sensor signal showed an air temperature over 293° F for more than 3 seconds after the engine has been running for 4 minutes and a vehicle speed was present.
32 EGR vacuum switch was closed during start-up or idle, or EGR vacuum switch did not close when EGR solenoid was commanded to close by ECM for 5 seconds.
33 MAF sensor indicated air flow was more than 20 gm/sec for 2 seconds.
34 MAF sensor signal showed air flow to be less than 2 gm/sec, or the MAF circuit was shorted.
41 The number of crank reference pulses did not match the number according to the PROM when engine speed was under 2000 RPM, or the incorrect PROM has been installed.
42 The EST signal did not change when the ECM applied bypass voltage to the ignition module.
44 Oxygen sensor voltage was under 0.2 volts for 60 seconds of closed loop operation.
45 Oxygen sensor voltage was over 0.7 volts for 30 seconds in a closed loop when throttle angle was between 3% and 45% and engine had been running for at least 1 minute.
51 PROM error.
52 CALPAK error.
53 Charging system voltage was greater than 17.1 volts for 2 seconds. Repair charging system.
54 Fuel pump signal voltage was less than 2 volts for 1.5 seconds.
55 ECM error. Replace ECM.