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Home >> Chevrolet >> 1988 >> Nova Base, 4D Hatchback, Standard >> Repair and Diagnosis >> Engine Performance >> System >> EFI CEC System >> Diagnosis & Testing >> Diagnostic Code Output >> Exiting Diagnostic Mode
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Exiting Diagnostic Mode

To exit diagnostic mode, remove jumper wire from engine check connector. Turn ignition off. After cancellation, perform a road test to confirm that a normal code is now displayed.

TROUBLE CODE IDENTIFICATION

Code No. Circuit Affected
No Code System Normal
12 & 13 RPM Signal
14 Ignition Signal
21 Oxygen Sensor Signal
22 Coolant Temp. Sensor Signal
24 Manifold Air Temp. Sensor Signal
25 Air/Fuel Ratio (Lean)
26 Air/Fuel Ratio (Rich)
31 Mass Airflow Sensor Signal
41 Throttle Position Sensor Signal
42 Vehicle Speed Sensor Signal
43 Starter Signal
51 Switch Signal
71 EGR System