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07-26-2017, 06:54 PM
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#1
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Name: jedeka
Title: Too Much Time
Status: Not Here
Join Date: Oct 2009
Location: Boone, Iowa
Member`s Gallery
Posts: 1,413
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Testing MAP sensor on 99
Got a truck in the shop to work on. CEL is on and I'm getting a P0237 code, which is low voltage signal from MAP sensor. I removed sensor and cleaned sensor and wire connector. Cleared codes, started truck up and still get CEL with P0237 code. I'm getting a 5v reading on the orange wire. If MAP sensor is bad, will I not be able to clear out that code? Thinking I will pick up the updated 4921505 sensor at Cummins, if my sensor is faulty.
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1996 Dodge Ram 2500 4x4, 5 spd. 4.88 gears, 2.5" turbo, Smokem inj, 5000 rpm springs, NV271, South Bend dd clutch, 33x12.50-15 STS tires, 6 inch stack, custom valve springs
2005 3500 4x4 dually, auto, KORE leveling coils, 19.5 wheels, Smarty Jr
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07-27-2017, 08:11 AM
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#2
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Name: jlbayes
Title: Too Much Time
Status: Not Here
Join Date: Mar 2011
Location: michigan
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Posts: 2,399
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You need to test the grey/red wire (pin 2). You checked the 5v ref....not the signal.....
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Jacob, 97 rclb
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07-29-2017, 07:44 AM
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#3
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Name: jedeka
Title: Too Much Time
Status: Not Here
Join Date: Oct 2009
Location: Boone, Iowa
Member`s Gallery
Posts: 1,413
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New sensor fixed the problem.
__________________
1996 Dodge Ram 2500 4x4, 5 spd. 4.88 gears, 2.5" turbo, Smokem inj, 5000 rpm springs, NV271, South Bend dd clutch, 33x12.50-15 STS tires, 6 inch stack, custom valve springs
2005 3500 4x4 dually, auto, KORE leveling coils, 19.5 wheels, Smarty Jr
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10-23-2017, 07:14 AM
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#4
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Name: David Jay Yoder
Title: Rookie
Status: Not Here
Join Date: Feb 2017
Location: Navarre, Ohio
Member`s Gallery
Posts: 21
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Iam having a p0237 code too. How did you get the old sensor out?Did you have to take off the return fuel line? A 1 1/16 socket will fit my new one but I cant get it to fit on the old one
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10-23-2017, 10:09 AM
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#5
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Name: CorneliusRox
Title: Seasoned Rookie
Status: Not Here
Join Date: Dec 2012
Location: Detroit, MI
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Posts: 4,154
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Quote:
Originally Posted by David Jay Yoder
Iam having a p0237 code too. How did you get the old sensor out?Did you have to take off the return fuel line? A 1 1/16 socket will fit my new one but I cant get it to fit on the old one
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They changed the sizes. I just did this on my dad's VP the other day and realized they were different for some reason. I don't remember having to move much of anything to get to it though. The job took about 5-10min.
__________________
Corey - BSME '21 Tesla Model 3 Perf
'22 DMax AT4 2500
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11-01-2017, 10:03 AM
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#6
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Name: David Jay Yoder
Title: Rookie
Status: Not Here
Join Date: Feb 2017
Location: Navarre, Ohio
Member`s Gallery
Posts: 21
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Quote:
Originally Posted by CorneliusRox
They changed the sizes. I just did this on my dad's VP the other day and realized they were different for some reason. I don't remember having to move much of anything to get to it though. The job took about 5-10min.
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Yeah I figured it out was able to get it off with a 1 1/4 I think it was. After replacing it with the new one and clearing code it soon came back on again though. So iam thinking its a electrical plug somewhere? maybe even the edge harness it plugs into could be bad?gonna try bypass that clear code see what it does
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