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Related Medium and Heavy Trucks Questions
2009 Peterbilt 387 engine fan turns on for a short time and
2009 Peterbilt 387 engine fan turns on for a short time and turns off when driving in weather.The water temperature is at 180 and its cool outside. … read more
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Wayne
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Vocational, Technical or Trade Scho
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Trying to locate fuse for brake lights 2007 peterbilt 387.
Trying to locate fuse for brake lights 2007 peterbilt 387 … read more
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2009 peterbilt 387 a/c quit. no power to switch on dash … read more
Andy
Andy
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Vocational, Technical or Trade School
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My temp gauge is reading 200 to 225 all the time all the
my temp gauge is reading 200 to 225 all the time all the sudden it keeps shutting down the motor red light flashing stop engine gets up to 250 i pull over immediately and laser temp the motor and it s… read more
Roy Belding
Roy Belding
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I have a 2009 peterbilt 387 with a 485 Cummins ,, while
I have a 2009 peterbilt 387 with a 485 Cummins ,, while driving if I hit a bump in the road,, the engine stalls for a few seconds then gets going … read more
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Andy
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2009 Peterbilt with Cummins ISX, would like OEM wiring for
2009 Peterbilt with Cummins ISX, would like OEM wiring for Idle validation switch. I have a flash code 431. … read more
Daniel Wilson
Daniel Wilson
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2009 Peterbilt with isx Cummins on insite trying to do a
2009 Peterbilt with isx Cummins on insite trying to do a stationary regen says clutch pedal is depressed just put in new clutch switch still says depressed try to bypass with jumper wire still says de… read more
FIX-IT
FIX-IT
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Peterbilt ISX engine engine brake stopped working think it's just a relay or fuse but do not have diagram … read more
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Where is the low air pressure buzzer located on a 2009 379
Where is the low air pressure buzzer located on a 2009 379 Peterbilt? … read more
John Oliver
John Oliver
none
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I have an 04 peterbilt the check engine light and stop
I have an 04 peterbilt the check engine light and stop engine light comes on and warning buzzer sounds and oil pressure is displayed in the dash. Checked oil level it is fine oil temp is at 175. This … read more
Cat Man
Cat Man
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Im an O/O with a 2009 Pete 387. I purchased the extra
Im an O/O with a 2009 Pete 387. I purchased the extra guage/dash panel kit off of ebay. Checked/tested the guages and statt guage test was good on self test. However i soon found that pyro, boost, fro… read more
Daniel Wilson
Daniel Wilson
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2004 Peterbilt w/C15 Acert (BXS) Okay i finally got fan
2004 Peterbilt w/C15 Acert (BXS) Okay i finally got fan situation figured out and it now cycles on @ 217 and off @206 like it should. BUT now when it gets hot (230 i believe) the buzzer comes on and "… read more
Cat Man
Cat Man
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Vocational, Technical or Trade Scho
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2004 Peterbilt 379 w/C15 acert fan will not turn on with
2004 Peterbilt 379 w/C15 acert fan will not turn on with switch in "auto". Gets up to 225-230 with no warning light or buzzer. It just started doing this about a week ago. Prior to that it kicked on a… read more
Cat Man
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I got A 2011 387 PETERBILT AND THE CHECK Engine is on been
I got A 2011 387 PETERBILT AND THE CHECK Engine is on been the shop every month I had it .every time they fix go down the road 300 miles the light comes back on… read more
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2009 peterbilt 387 with isx cummins engine have check engine
2009 peterbilt 387 with isx cummins engine have check engine light but no codes I did cycle the switches and disconnected the three cables at ECM still engine light on no codes..any ideals… read more
Andy
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Vocational, Technical or Trade School
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I have a 2005 Peterbilt 387 and occasionally it will start
I have a 2005 Peterbilt 387 and occasionally it will start flashing every gauge and light on the dash. It usually stops immediately and I regain power. Today it started blinking and the gauges went ha… read more
Cat Man
Cat Man
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have a 2001 Peterbilt 387 10 speed cat C-12, when we go through
have a 2001 Peterbilt 387 10 speed cat C-12, when we go through a really hard rain all our tach ,speedometer,oil pressure,water temp, turbo boost. oil temps all freeze and stop working.Sometimes they … read more
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Cat Man
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i have a 2004 bluebird bus with a catepillar c7. i have a buzzer
i have a 2004 bluebird bus with a catepillar c7. i have a buzzer going off under under certain conditions. when you start and run the engine cold, everything is fine. the low air prssure buzzer goes o… read more
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Meet the Experts:

Daniel Wilson

Daniel Wilson

5,254 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

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I am ASE Master Truck Certified.

Wayne

Wayne

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worked on, Gmc, Macks, Freight liner,Mercedes Benz,,Ford, sterling

Jeremy

Jeremy

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ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, Network Engineer specializing in CAN faults, Aftertertreatment, and vehicle communications

cumminsdr

cumminsdr

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Curtis B.

Curtis B.

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Technician turned service manager on multiple lines of trucks and engines, used in industry.

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Chris (aka-Moose)

Technician

353 satisfied customers

24 years of experience diagnosing & repairing

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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