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Both test modes should be used to get the accurate evaluation of the stored fault codes. On Fords, there are 2 test modes, the KOEO (key on engine off) and the KOER (key on engine running).
#How to read 1991 ford engine codes code#
If there is no code, you will normally get code 11 or 111. Getting the obd1 codes need a couple of tools: a 4 inch long gage 16 jumper wire and a 12 volt test light.īoth tools are hooked up to the diagnostic connector and when the ignition key is turned on (without starting engine) the codes will begin to flash in the test light, not in the dash panel. You can check their check engine light using the diagnostic connector located at the engine compartment by the fender near the battery. Otherwise, code 12 will flash 3 times before flashing the fault codes.
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This code 12 means the diagnostic system is normal and will repeat itself continuously if there are no trouble codes. All codes should start with code 12 which is one long flash followed by 2 short flashes. Turn your ignition key on with engine off and the codes should start to blink. To get the check engine codes to flash in your dash panel, use a jumper wire or a paper clip and connect terminals A and B of the diagnostic connector.
#How to read 1991 ford engine codes driver#
The diagnostic connector is located under the dash panel by the driver side. For GM domestic vehicles made before 1995.This system is called obd1 and applies to most vehicles made before 1995 for domestics and 1993 on imports.Ģ) How to Check the Engine Light Codes for car and trucks made on and before 1995 No need buying a scanner or running to any parts stores to check the engine light. OBD was designed on vehicles equipped with electronic fuel injection so you can generally retrieve the codes yourself. If you don't have any scanner like most drivers, you can bring your vehicle to any local automotive parts store and they will usually scan the codes FREE for you.įor vehicles made on or before 1995, the only cheap way to get it is to do it yourself! You can then hook up a scanner and the codes will be displayed for you. All you need to do is find your diagnostic connector located under the dash by the driver side. For vehicles made after 1996, retrieving the codes of the check engine light in your dash panel is simple.