check engine light on
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Laughing Gas
Joined: Mar 2005
Posts: 765
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From: ct
check engine light on
my 94 f 250 4x4 has the check engine light on in the dash for the last 2 or 3 days.it only goes off after i shut the truck off then start it back up it will stay off until i drive the truck hten it comes back on.I know its an emmisons issue but how can i tell what one?would auto zone or advanced pull the code for me?Im thinking its the catalytic converter or the oxygen sensor.do parts stores sell after market catalytic converters?thanks
Post Fiend
Joined: Jan 2005
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Ford Fuel Injection How To Run a Self-Test Here is a link to instructions on getting the codes. Or you can buy a code reader for under $30.00.
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Laughing Gas
Joined: Mar 2005
Posts: 765
Likes: 1
From: ct
where can I buy the Equus 3145? would advanced auto or auto zone sell it?I never used a code reader how do I know what all the codes mean?does it come with come soft of book?where would I hook the code reader up in my 94 f 250?I had a mechaincic pull the code for me today but i want to do it myself from hear on to save money.he said I have a weak o2 sensor he said its good but weak.what is this guy talking about?doesnt weak mean bad sensor?
Post Fiend
Joined: Jan 2005
Posts: 8,402
Likes: 10
The code reader plugs into the diagnostic connectors shown in the link I gave you. You will also find the list of 3 digit codes on that site and what they mean.
Yes "weak" usually means bad but not dead.
If the oxygen sensor has much more that 100,000mls on it I would be inclined to replace it anyway.
Yes "weak" usually means bad but not dead.
If the oxygen sensor has much more that 100,000mls on it I would be inclined to replace it anyway.
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