128 102 7-Engine #1 Boost Pressure Mechanical System Not Responding

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Chris Firman, Feb 10, 2020.

Feb 10, 2020 #1

Chris Firman Bobtail Member

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Oct 3, 2019

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We have a 2003 Kenworth T800 with a Cat C15, MBN. When the truck hits 35 psi of boost, the check engine light comes on. It will go out when the boost decreases. The code is 128 102 7-Engine #1 Boost Pressure Mechanical System Not Responding. I can't seem to find this code online or in any of our service manuals. Any help would be appreciated. Thanks!

Chris Firman, Feb 10, 2020

Chris Firman, Feb 10, 2020

#1
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Feb 10, 2020 #2
pushbroom Road Train Member

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Troubleshooting attached.
Attached Files:

C15 Wastegate.pdf

File size:

2 MB

Views:

115
pushbroom, Feb 10, 2020

pushbroom, Feb 10, 2020

#2

SAR, spsauerland and Chris Firman Thank this.
Feb 10, 2020 #3

Chris Firman Bobtail Member

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Oct 3, 2019

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Thank you very much! I’ll go through this when I get the truck into the shop.

Chris Firman, Feb 10, 2020

Chris Firman, Feb 10, 2020

#3