Check engine
Thread Starter
|
Freshman User
Joined: Dec 2013
Posts: 31
Likes: 0
Check engine
So I was wondering if anyone can point me in the right direction with my dilemma? I have a 96 f150, 5.0, auto trans, Twice in the past week I have been cruising down the street in OD and I would let me foot of the gas and get back on and my trans will downshift and the check engine light comes on and I lose power. This only lasts for about 5 seconds and right as the light goes away the truck is back to normal. I'm planning on getting codes read but I was wondering if anyone could give me advice on where to start first? I also replaced the TPS last week but I'm not sure if that would change anything because this feels like a trans problem. But any help would be appreciated.
Thank you, Dave
Thank you, Dave
Postmaster
Joined: Nov 2011
Posts: 3,533
Likes: 17
From: SW Florida
Who read your codes, AutoZone?
I think their scanner can read pending codes as well as active.
Either way, you should have active fault codes by now...
If there really ain't any codes set, then I'd think maybe you got an intermittent open circuit somewhere. Just something to consider at this point, not a diagnosis.
Does the truck cut out completely when this happens, like turning off the ignition switch?
I think their scanner can read pending codes as well as active.
Either way, you should have active fault codes by now...
If there really ain't any codes set, then I'd think maybe you got an intermittent open circuit somewhere. Just something to consider at this point, not a diagnosis.
Does the truck cut out completely when this happens, like turning off the ignition switch?
Thread Starter
|
Freshman User
Joined: Dec 2013
Posts: 31
Likes: 0
the check engine light is not on. It only appears when the incident happens. Autozone checked it and it found no codes unless they did it wrong. The truck does not shut off it just doesn't respond to throttle just slows down.
Freshman User
Joined: Nov 2013
Posts: 32
Likes: 0
From: western MA
Last time I had a check engine light on I popped the hood and made sure it was still there! It was... Problem solved... LOL
Do you know how to check OBD 1 codes? Or is it obd2 style? Usually OBD 2 codes will stick around in Pending faults. I dont think all scanners pick up pending faults.
Do you know how to check OBD 1 codes? Or is it obd2 style? Usually OBD 2 codes will stick around in Pending faults. I dont think all scanners pick up pending faults.
Trending Topics
Thread Starter
|
Freshman User
Joined: Dec 2013
Posts: 31
Likes: 0
Ive heard 96 was the switching over year so some people say its a toss up between OB1 and 2 but im pretty sure mine is OB2
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
Freshman User
Joined: Nov 2013
Posts: 32
Likes: 0
From: western MA
OBD 1 you can check yourself using a wire or a couple of screw drivers. Under the hood on the drivers side fender wall there is a connector Test port something. and my jumping the wires it will give you codes.
I personally Bought a Bluetooth adapter that i can use in conjection with my smart phone. Give me Live data and stored pending faults... Only 27 dollars on ebay.
Fleet Owner
Joined: Oct 2005
Posts: 20,789
Likes: 1,753
From: Kentucky
1996 model year F150 & Broncos are all OBD-II. The larger trucks, F250/350, can be either one depending on many factors.
Postmaster
Joined: Nov 2011
Posts: 3,533
Likes: 17
From: SW Florida
Last time I had a check engine light on I popped the hood and made sure it was still there! It was... Problem solved... LOL
Do you know how to check OBD 1 codes? Or is it obd2 style? Usually OBD 2 codes will stick around in Pending faults. I dont think all scanners pick up pending faults.
Do you know how to check OBD 1 codes? Or is it obd2 style? Usually OBD 2 codes will stick around in Pending faults. I dont think all scanners pick up pending faults.
That light is useless to me, it's on for the inop EGR so if anything else went wrong it wouldn't be able to tell me anyway.
That's strange that the light don't stay on though. Every OBDII system I've had, once the light was on it was there to stay until cleared. Think it's also supposed to clear itself after like 80 ignition cycles without detecting a fault, but I never waited that long.
OBDI systems have that annoying on/off/on/off thing going... it might have a code set but the light's only on when it sees the problem, then it's out the next time you start until it sees the problem again. I thought all 96 half-tons were OBDII but I could be wrong.
OP, if you have OBDI then ignore my post above (post #5).
Thread Starter
|
Freshman User
Joined: Dec 2013
Posts: 31
Likes: 0
my test port where you plug in the reader is in the cab under the dash and most people are saying its OBII so im assuming that's what it is but I am still confused about my problem. The trans shifts smooth and has no poor characteristics except when this incident happens which leads me to believe its some sort of sensor. does anyone know of a faulty sensor that could cause this?
Fleet Owner
Joined: Oct 2005
Posts: 20,789
Likes: 1,753
From: Kentucky
my test port where you plug in the reader is in the cab under the dash and most people are saying its OBII so im assuming that's what it is but I am still confused about my problem. The trans shifts smooth and has no poor characteristics except when this incident happens which leads me to believe its some sort of sensor. does anyone know of a faulty sensor that could cause this?
I seem to recall the power for the Diagnostic Data Link comes from the same fuse as the lighter, Fuse 16. If that is blown you will not be able to pull any codes with the reader. Very common problem....