EF Civic - Honda Trouble Codes - 88-91 Civic Check Engine Light
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With the ignition on the ECU will display a single flashing light indicating the system is operating. When the ecu sets a trouble code,the check engine light will come on and the ecu stores the code in the memory. The trouble code will remain in the memory until voltage to the ecu is disconnected. Removing the hazard fuse in the main fuse panel for 10 seconds will reset all trouble codes. Reset the memory after repairs are made. Make sure the ignition is OFF when disconnecting the main fuse.
- Code 1 (1 flash) :: Oxygen content
- Code 3 or 5 :: Manifold absolute pressure
- Code 4 (4 flashes) :: Crank angle sensor
- Code 6 (6 flashes) :: Coolant temperature
- Code 7 (7 flashes) :: Throttle angle
- Code 8 (8 flashes) :: TDC position (top dead center) timing
- Code 9 (9 flashes) :: No. 1 cylinder position (1.6L)
- Code 10 (10 flashes) :: Intake air temperature
- Code 12 (12 flashes) :: Exhaust gas recirculation system
- Code 13 (13 flashes) :: Atmospheric pressure
- Code 14 (14 flashes) :: Electronic air control (EACV)
- Code 15 (15 flashes) :: Ignition output signal
- Code 16 (16 flashes) :: Fuel injector
- Code 17 (17flashes) :: Vehicle speed sensor
- Code 19 (19 flashes) :: Lock up control solenoid valve
- Code 20 (20 flashes) :: Electric Load