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90-91 2.2L VIN G TBI
13	Oxygen sensor voltage stays between 0.35 and 0.55 volts for 3 seconds. Engine was at normal operating temperature and had been running for at least 40 seconds after start with a throttle angle above 7%.
14	Coolant temperature sensor signal indicates a temperature of over 275° F for 2 seconds.
15	Coolant temperature sensor signal indicates a temperature colder than -22° F after engine had been running for 2 minutes.
21	TPS voltage was above 2.5 volts for 2 seconds when the MAP sensor signal showed manifold vacuum to be 15 pounds or more with an engine speed less than 1800 RPM.
22	TPS voltage was under 0.2 volts when the engine was running.
23	Inlet air temperature sensor signal showed an air temperature below -31° F after the engine has been running for 2 minutes (on Beretta & Corsica, engine has been running for 9 minutes).
24	When engine speed was between 1200 and 4400 RPM, the MAP signal showed low voltage (high manifold vacuum) for at least 5 seconds.
25	Inlet air temperature sensor signal showed an air temperature over 275° F for more than 2 seconds after the engine had been running for 9 minutes.
32	EGR 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.
33	MAP sensor signal voltage was too high (low vacuum) for 5 seconds when throttle opening was under 2%.
34	MAP sensor signal voltage was too low (high vacuum) when engine speed was above 1200 RPM and TPS was greater than 20%.
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 50 seconds of closed loop operation.
45	Oxygen sensor voltage was over 0.75 volts for 50 seconds or more in closed loop operation.
51	PROM error.
53	Charging system voltage was greater than 16.9 volts for 10 seconds. Repair charging system.

90-91 2.2L VIN G TBI

Oxygen sensor voltage stays between 0.35 and 0.55 volts for 3 seconds. Engine was at normal operating temperature and had been running for at least 40 seconds after start with a throttle angle above 7%.

Coolant temperature sensor signal indicates a temperature of over 275° F for 2 seconds.

Coolant temperature sensor signal indicates a temperature colder than -22° F after engine had been running for 2 minutes.

TPS voltage was above 2.5 volts for 2 seconds when the MAP sensor signal showed manifold vacuum to be 15 pounds or more with an engine speed less than 1800 RPM.

TPS voltage was under 0.2 volts when the engine was running.

Inlet air temperature sensor signal showed an air temperature below -31° F after the engine has been running for 2 minutes (on Beretta & Corsica, engine has been running for 9 minutes).

When engine speed was between 1200 and 4400 RPM, the MAP signal showed low voltage (high manifold vacuum) for at least 5 seconds.

Inlet air temperature sensor signal showed an air temperature over 275° F for more than 2 seconds after the engine had been running for 9 minutes.

EGR 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.

MAP sensor signal voltage was too high (low vacuum) for 5 seconds when throttle opening was under 2%.

MAP sensor signal voltage was too low (high vacuum) when engine speed was above 1200 RPM and TPS was greater than 20%.

The EST signal did not change when the ECM applied bypass voltage to the ignition module.

Oxygen sensor voltage was under 0.2 volts for 50 seconds of closed loop operation.

Oxygen sensor voltage was over 0.75 volts for 50 seconds or more in closed loop operation.

PROM error.

Charging system voltage was greater than 16.9 volts for 10 seconds. Repair charging system.

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