2001 powerstroke o/d light blinking?
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2001 powerstroke o/d light blinking?
I just purchased a 2001 f-250 with a 7.3 powerstroke turbo diesel. i noticed this morning when i started it up, right away the o/d light on the shift lever started blinking. it went away after a minute and after restarting the truck it didn't do it again. only the first start of the day. Did the same thing yesterday again just on the first start of the day.
Now i know that means its throwing a code at me and i have a problem in the transmission somewere. So far the transmission is shifting correctly and i don't realy have any problems that i can determine. any one else have an issue like this?
I dont have it on the road just yet so i can't get it to a shop to get it scanned, figured i would see what you guys think.
Now i know that means its throwing a code at me and i have a problem in the transmission somewere. So far the transmission is shifting correctly and i don't realy have any problems that i can determine. any one else have an issue like this?
I dont have it on the road just yet so i can't get it to a shop to get it scanned, figured i would see what you guys think.
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Joined: May 2009
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From: San Antonio
Replace the VSS (vehicle speed sensor).
But you could also have an electrical bug somewhere (alternator most likely). Electrical bugs somewhere trip the OD light to flash giving you a false code for your VSS. More than likely you have a bad VSS.
But since you don't have spark plugs, its probably one of the two. If its throwing the VSS code that is.
I was getting the same thing, and it started messing with my shifting and felt like my trans was failing, but it was caused by a misfire in my V10, but the electrical system was tripping the VSS code.
But you could also have an electrical bug somewhere (alternator most likely). Electrical bugs somewhere trip the OD light to flash giving you a false code for your VSS. More than likely you have a bad VSS.
But since you don't have spark plugs, its probably one of the two. If its throwing the VSS code that is.
I was getting the same thing, and it started messing with my shifting and felt like my trans was failing, but it was caused by a misfire in my V10, but the electrical system was tripping the VSS code.
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As i stated i am going to get it scanned as soon as i can. i do plan on having the trany flushed and maybe put synthetic in it.
As far as i can tell the spedo is accurate so the sensor shouldn't be bad but its good to know i could have a simple electrical bug if it is throwing that code. Thanks. I guess since its shifting normaly the only thing i can do is wait to get it scanned. =( Hoping theres nothing major wrong.
As far as i can tell the spedo is accurate so the sensor shouldn't be bad but its good to know i could have a simple electrical bug if it is throwing that code. Thanks. I guess since its shifting normaly the only thing i can do is wait to get it scanned. =( Hoping theres nothing major wrong.
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From: St Louis
Get it scanned before doing anything else. Doing anything else is about as effective as farting into a hurricane.
Since it's an issue at power-up, it is probable that it's a failed electrical self-test as the PCM runs rationality and basic electrical tests of the sensors and electrical actuators at power up. The DTC(s) can tell you what the PCM doesn't like.
Just be advised that inexpensive readers and scanners usually do not offer "manufacturer-specific" code support which is where many (but not all) of the transmission-related fault codes will fall.
Since it's an issue at power-up, it is probable that it's a failed electrical self-test as the PCM runs rationality and basic electrical tests of the sensors and electrical actuators at power up. The DTC(s) can tell you what the PCM doesn't like.
Just be advised that inexpensive readers and scanners usually do not offer "manufacturer-specific" code support which is where many (but not all) of the transmission-related fault codes will fall.
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Well i got it scanned at my cousins shop. it was throwing a bunch of codes but i think its from when a bunch of work had been done to it and they never cleared. Got all of them cleared and drove around for a day. The only code that it has now came up as P705 on his tool. Says it is a Range Sensor. Which would explain why it was shifting a little funny yesterday.
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Hotshot
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From: St Louis
It certainly may explain the symptoms.
The PCM checks the output of the DTR sensor for a logical pattern as part of the diagnostics. If there is a fault in one of the switch segments (open circuit or short to ground or power), the wiring, or the input to the PCM, the data will be recognized as illogical and the PCM will default to a "fail-safe" operating mode for the transmission.
Per the WSM under "Symptoms" for P0705:
You can start by disconnecting the DTR's connector and inspecting and cleaning the contacts of both the sensor and the connector with contact cleaner, reapply dielectric grease, and retest. Sometimes it's just a poor connection that has built up some corrosion over time and cleaning will help it. If it persists, you can swap the DTR sensor. Beyond that, you'll have to dig into the wiring or investigate the connections and the inputs at the PCM.
The PCM checks the output of the DTR sensor for a logical pattern as part of the diagnostics. If there is a fault in one of the switch segments (open circuit or short to ground or power), the wiring, or the input to the PCM, the data will be recognized as illogical and the PCM will default to a "fail-safe" operating mode for the transmission.
Per the WSM under "Symptoms" for P0705:
Increase in EPC pressure (harsh shifts). Defaults to (D) or D for all gear positions. In (D) position transmission stuck in D or manual 2. May flash MIL
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Here in Massachusetts we have whats called "lemon law" (not sure if it extends outside of mass, i imagine it does). Basicly the dealer has to make sure my truck will pass an inspection sticker. well i got a rejection for an exhaust leak and two other things so i was gonna have him fix it but he seems to be "ducking" me (for a lack of a better term). So it looks like im stuck fixing this myself. I will be taking a look at the wiring like projectsho89 has suggested and i am going to re-adjust the shift linkage after i get the sloppyness from the shift lever on the steering column taken care of. but now i have a new concern.... The truck had tires with an aggresive tred on it. well i put some regular tires i had laying around on it because i didn't want to listen to what i thought was tire growl....well that loud humming noise wasn't the tires. sounds like its comming from the trany.... do i even want to know what that is/could be?
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Also another question. i have sitting in my yard a 99 f350 with the 5.4 gas engine.
Its an automatic. Is it the same transmission as mine. I mean its completly shot but if i need to get a new range sensor would it be worth tearing that one out and putting that one in mine see if its any good?
Its an automatic. Is it the same transmission as mine. I mean its completly shot but if i need to get a new range sensor would it be worth tearing that one out and putting that one in mine see if its any good?
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