Speedometer Quit/Engine Light On

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Oct 14, 2012 | 02:35 PM

Dean_250

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From: SE Louisiana

Speedometer Quit/Engine Light On

I bought F250 Diesel, not 4x on 9/11. On 10/11, speedometer went to 28MPH minimum. Actual speed appeared to be reading minus 28. Next day it failed. Yesterday service engine light came on. 2006 automatic. Tried search but all seem to be 97 and older where actual cables were used. Should I look for a fuse? any ideas?
Hoping it is not the computer...
Thanks.

Oct 14, 2012 | 05:13 PM

projectSHO89

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From: St Louis

Go get the fault code read first...

Oct 15, 2012 | 09:40 AM

miller_feed

Hook it, I'll pull it.

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From: Grand Lake, La.

Have the codes read. If you get a code for the ABS/VSS sensor, you will find it on top of the rear differential. VSS= Vehicle Speed Sensor.

Oct 15, 2012 | 04:40 PM

redford

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From: Stephensville WI

Sounds like a VSS issue.

Oct 15, 2012 | 05:01 PM

projectSHO89

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From: St Louis

Quote:

Sounds like a VSS issue.

Of course it does. However, the DTC will remove a lot of guessing.

Oct 16, 2012 | 11:50 AM

Dean_250

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From: SE Louisiana

Only one trouble code: "P0299 Turbocharger or Supercharger "A" Underboost Condition".
I'm beginning to think the culprit for this issue is Cetane related. Have filled up twice since driving it off dealer's lot where it sat for a month. Both fillups at Walmart; and I have babied the engine the whole time. Walmart's price is 20 cents lower than anyone else around here. I wondering if their cetane rating might be 20% lower too. I read that Motorcraft Cetane Booster (something like that) is recommended at every fillup. I'm going to try truck-stop diesel+additive, then drive it hard (past 2,000 RPM). Many of the recomendations of the fault code involve cleaning parts related to EGR, EBP and other turbo related.
Of course this does not address the screwed up speedometer.

Oct 24, 2012 | 09:17 AM

Dean_250

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From: SE Louisiana

Speedometer

Found the TSB for instrument gauges. Removed the cluster. Have a couple of burned out bulbs. There are 14. Thought I would stop by auto parts store. No help. Bulbs are not listed in any Sylvannia reference, Clinton, or owner's manual. Someone wrote to be careful as several fit but could fry the instrument panel printed circuit board. Also see where a member is thinking of going with LED's. Going to search for an on-line bulb vendor but still don't have the Ford specs for the little lamps. Not sure I want to tackle the issue of the appliqué peeling which might have caused the speedometer failure. For now, I will dust and clean the bulbs, then put everything back. Have not jacked up the truck to inspect the sensor on the pumpkin.