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+--- Thread: Peterbilt 2015 cm2350 list of issues (/showthread.php?tid=9874)
RE: Peterbilt 2015 cm2350 list of issues - tree98 - 01-07-2025
Are you still only getting just one code (3138) ?
RE: Peterbilt 2015 cm2350 list of issues - Trey7981 - 01-07-2025
Since the ecm was replaced its two codes, same codes as before minus the Derate code” has 2hrs till derate right now” egr outlet pressure erratic and dpf diff pressure erratic codes 3138 and 5715
RE: Peterbilt 2015 cm2350 list of issues - Trey7981 - 01-07-2025
(01-04-2025 )Rawze Wrote:We recalibrated the turbo yesterday when I saw this just in case.(01-04-2025 )Trey7981 Wrote: Last night after repair truck was making 45psi on manifold pressure gauge under hard acceleration. That doesn’t seem right I’ve never seen over 38psi.
turbo arm slipping / out of calibration?
RE: Peterbilt 2015 cm2350 list of issues - tree98 - 01-07-2025
Thats a good place to start but if there's something internally wrong with the turbo ring, calibrating it won't solve the problem. The ecm will think the turbo position is correct but it won't be. Take the actuator off and do a turbo inspection.
If the VG ring sector gear is slipping or something else causing the actual position of the ring to be somewhere other than where it's commanded to be you could have the symptoms your having.
https://youtu.be/ZUpKb5umv_0?si=WmETkWUIXMQq6DFZ
RE: Peterbilt 2015 cm2350 list of issues - Trey7981 - 01-07-2025
(01-04-2025 )Rawze Wrote:We recalibrated the turbo yesterday when I saw this just in case.(01-04-2025 )Trey7981 Wrote: Last night after repair truck was making 45psi on manifold pressure gauge under hard acceleration. That doesn’t seem right I’ve never seen over 38psi.
turbo arm slipping / out of calibration?
RE: Peterbilt 2015 cm2350 list of issues - Trey7981 - 01-07-2025
Just got word from the dealer that the truck is fixed and did a 20 mile test drive to verify. I told them please do another test drive of 50 miles. But the issue appears to be the egr pressure sensor has a duplicate part # with the isb exhaust sensor which has since been updated. This sensor must have been an old part in the shelf and the ISX and ISB sensors have a different pressure range but look identical. We will see tomorrow
RE: Peterbilt 2015 cm2350 list of issues - tree98 - 01-07-2025
Glad to hear it's fixed. Hopefully they aren't going to charge you for all that wasted time that was there own fault.
RE: Peterbilt 2015 cm2350 list of issues - Trey7981 - 01-08-2025
$7k dollars for a new ecm after treatment gaskets and a $180 sensor
RE: Peterbilt 2015 cm2350 list of issues - tree98 - 01-08-2025
(01-08-2025 )Trey7981 Wrote: $7k dollars for a new ecm after treatment gaskets and a $180 sensor
It's criminal!!