GM OBD/OBD2 Codes >> GM 1986-1988 2.5L VIN R TBI

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1986-1988 2.5L VIN R TBI
13Oxygen sensor voltage stays between 0.35 and 0.55 volts for 3 seconds during closed loop operation and will set code after 40 seconds for Century and Cutlass Ciera. For the Lumina, the oxygen sensor voltage stays between 0.35 and 0.55 volts for 60 seconds during closed loop operation and will set code after 2 minutes. Both systems can go into open loop after 15 seconds.
14Coolant temperature sensor signal indicates a temperature of over 275° F for 3 seconds.
15Coolant temperature sensor signal indicates a temperature colder than -22° F after the engine has been running for 2 minutes.
21TPS voltage was above 2.5 volts for 2 seconds when the MAP sensor signal showed manifold vacuum to be 15 pounds or more under 1800 RPM.
22TPS voltage was under 0.2 volts for 2 seconds when the engine was running.
23Inlet air temperature sensor signal showed an air temperature of -22° F after the engine has been running for 1 minute.
24Vehicle Speed Sensor Sensor/Circuit. Throttle position signal was less than 2% with engine speed between 1400 and 4400 RPM and the MAP signal showed low voltage and high manifold vacuum. Transmission was not in park or neutral.
25Inlet air temperature sensor signal showed an air temperature over 275° F for more than 2 seconds after the engine has been running for 5 minutes and vehicle speed was greater than 44 MPH.
32EGR 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 exhaust gas.
33MAP sensor signal voltage was too high (low vacuum) for at least 5 seconds when throttle opening was under 2%.
34MAP sensor signal voltage was too low (high vacuum) when engine speed was under 1200 RPM or when engine speed was over 1200 RPM with throttle opening was over 20%.
35Idle speed was over 150 RPM outside the desired engine speed commanded by the ECM.
42The EST signal did not change when the ECM applied bypass voltage to the ignition module.
44Oxygen sensor voltage was under 0.2 volts for 60 seconds of closed loop operation.
45Oxygen sensor voltage was above specification. Century and Cutlass Ciera was over 0.75 volts for 50 seconds in a closed loop. Lumina was over 0.7 volts for 30 seconds and throttle angle was between 3% and 45%.
51PROM error.
53Charging system voltage was greater than 16.9 volts for more than 50 seconds. Repair charging system.
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