GM and Chevrolet OBD1 Trouble Codes (ALDL Fault Code List) >> GM 82-83 2.5L

GM

82-83 2.5 L
13Oxygen sensor circuit
14Coolant temperature sensor voltage low
15Coolant temperature sensor voltage high
21TPS voltage was above 2.5 volts for 10 seconds when the MAP sensor signal showed manifold vacuum to be 15 pounds or more with an engine speed less than 1300 RPM.
22TPS voltage was under 0.2 volts for 4 seconds when the engine was running.
24Vehicle Speed sensor circuit
33MAP sensor signal voltage was too high (low vacuum) for 5 seconds when throttle opening was under 2%.
42The EST signal did not change when the ECM applied bypass voltage to the ignition module.
44Oxygen sensor lean exhaust indication.
45Oxygen sensor rich exhaust indication.
51PROM not reading.
55ECM problem
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