91 Hatchback engine codes

[casieg]

I have a 91 Honda Civic Hatchback and the engine light is on. The code seems to be a 66 or maybe a 6. Any idea on what those might be?

 

[James315]

there is no code 66 its probably a code 6 if thats your only code it will just repeat. if it is in fact code 6, code 6 is ECT (Engine Coolant Temperature) Basically you either have bad wiring to coolant temp sensor bad its unpluged or the sensor is bad i would say sensor is bad if obvisous of either the first two things arnt there.

 

[casieg]

Thank you! After we get this fixed, how do we cancel the code?

 

[jlicrx]

Thank you! After we get this fixed, how do we cancel the code?

remove the hazard/ECU fuse in the main fuse box under the hood for 20 seconds and the ECU will reset - the fuse is #34 which is the top one in the row of 5 closest to the firewall

the coolant temp sensor for code 6 is on the end of the head below the distributor - has a 2-wire connector with 1 red with white stripe wire and 1 green with white stripe wire