Code 29
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I'll start by checking the vacuum lines and check the sensor, I will probably just replace the sensor to be on the safe side. I have a diagnostic check sheet for by the cruise control. Is it recommended to change out the tps and the mlps at a certain milage?
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Any updates? I have a 1993 F250 7.5L E40D with the same 1992 ECM and getting a code 31 and 62 with a CEL. Did some troubleshooting and replaced the ECM with a reman unit a year or so ago and the problem went away.
Well a few months ago the truck just started stalling at random times, and the transmission would take forever to shift into second, with a harsh shift. No cel.
I ran the codes anyway and got a 29. Threw a VSS in because the internet said so and the code went away for a few weeks. Now its doing the hard late shifting again and occasionally stalling. Still. No. CEL. But getting codes 29, 31 and 62. I reset the codes, took it for a quick drive, and same codes came up.
Bought an EVP, but the old one tests the same so I'm wary about putting that in.
I'm getting tired of this!
Well a few months ago the truck just started stalling at random times, and the transmission would take forever to shift into second, with a harsh shift. No cel.
I ran the codes anyway and got a 29. Threw a VSS in because the internet said so and the code went away for a few weeks. Now its doing the hard late shifting again and occasionally stalling. Still. No. CEL. But getting codes 29, 31 and 62. I reset the codes, took it for a quick drive, and same codes came up.
Bought an EVP, but the old one tests the same so I'm wary about putting that in.
I'm getting tired of this!
Fleet Owner
Joined: Jul 2006
Posts: 20,375
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From: Mi'kma'ki
Any updates? I have a 1993 F250 7.5L E40D with the same 1992 ECM and getting a code 31 and 62 with a CEL. Did some troubleshooting and replaced the ECM with a reman unit a year or so ago and the problem went away.
Well a few months ago the truck just started stalling at random times, and the transmission would take forever to shift into second, with a harsh shift. No cel.
I ran the codes anyway and got a 29. Threw a VSS in because the internet said so and the code went away for a few weeks. Now its doing the hard late shifting again and occasionally stalling. Still. No. CEL. But getting codes 29, 31 and 62. I reset the codes, took it for a quick drive, and same codes came up.
Bought an EVP, but the old one tests the same so I'm wary about putting that in.
I'm getting tired of this!
Well a few months ago the truck just started stalling at random times, and the transmission would take forever to shift into second, with a harsh shift. No cel.
I ran the codes anyway and got a 29. Threw a VSS in because the internet said so and the code went away for a few weeks. Now its doing the hard late shifting again and occasionally stalling. Still. No. CEL. But getting codes 29, 31 and 62. I reset the codes, took it for a quick drive, and same codes came up.
Bought an EVP, but the old one tests the same so I'm wary about putting that in.
I'm getting tired of this!
EVR - (O, R, M) EVP signal is/was low
PFE - (O, R, M) PFE signal is/was low
Code 62 see here.(Being in the diesel section doesn't matter.Same info applies.)
E40D: The Importance Of A Clean Trans Harness.
VSS code could be PSOM or wiring issue between VSS and PSOM.
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