Medium and Heavy Trucks

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Have 2012 Peterbilt with bad CECU. It would not communicate
Have 2012 Peterbilt with bad CECU. It would not communicate with the cluster. I have checked all CAN and power/ground. Concluded bad CECU. Ran successful backup on ESA, installed new CECU and did flas… read more
NicholasM1019
NicholasM1019
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Vocational, Technical or Trade School
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2012 Peterbilt 587 with Cummins isx15) I've changed the dpf filter did the rest with insite and a regen, now the regen required light stays on it was not on before the change. The filter is a Cummins … read more
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How much are you charge. How much it is the monthly
How much are you charge JA: It's just a small, refundable fee for a 7-day JustAnswer trial. After that, it's a small monthly membership fee. What's the make/model/year of your truck? Engine type? Cust… read more
Scott Anthony
Scott Anthony
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2012 peterbilt 386 all lights are working except trailer
2012 peterbilt 386 all lights are working except trailer brake lights I'm getting no power to pig tail plug for trailer brake lights. I changed brake switches and relay and still not working?? … read more
Mikael
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Got a code for particulate trap 1 sensor, with codes 1879
Got a code for particulate trap 1 sensor, with codes 1879 and 2963 and 3714 . Ran fine all parked and went into store 3714 code Regen light on. … read more
Mike Mcmillan
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2012 pet 386. ISX 15. engine s/n 79481931. truck died like
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Daniel Wilson
Daniel Wilson
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I have a 2012 peterbilt 386 w/ isx15. keeps breaking oil
i have a 2012 peterbilt 386 w/ isx15. keeps breaking oil coolers. trying to determine what is cause. … read more
Mike Mcmillan
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I do have a peterbilt 2011 386, im trying to install
Hi. I do have a peterbilt 2011 386, im trying to install mirror's aftermarket turn signals and running lights on both sides. Can you help me to find the power source. Thanks … read more
Wayne
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I had wheel sluppage in my 2012 587. I turned on the inter
I had wheel sluppage in my 2012 587. I turned on the inter axle lock and got off the ice while i was bobtailing. Turned off the inter axle lock and now tractor abs light is on and atc light is on and … read more
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I am getting a reading of particulate trap 1pressure on my
I am getting a reading of particulate trap 1pressure on my 2012 peterbilt 386 with a cummings isx15 … read more
Daniel Wilson
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2009 386 with Cummins ISX. Lose throttle and engine light
2009 386 with Cummins ISX. Lose throttle and engine light comes on. Code is throttle position. replaced 2 tps's, both the harnesses to ECM, and the ECM. Added more grounding and cleaned all connection… read more
Daniel Wilson
Daniel Wilson
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I am working on a peterbilt model 386 year 2010. Problem Im
I am working on a peterbilt model 386 year 2010. Problem Im having is the dash cluster is completely dead. No lights or guages. nothing. Here is what ive done so far. I checked power at the plug. I ha… read more
Daniel Wilson
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Auto Mechanics 1&2/diesel mech
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Location of the jake brake on 2013 model 386 peterbikt,
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Dorian Conley
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Vocational, Technical or Trade School
I have an ISX 1 EGR DPF pushes coolant out the overflow, in
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cumminsdr
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I have an isx15 cm2250 400hp with 680K miles on it in a 2012
I have an isx15 cm2250 400hp with 680K miles on it in a 2012 peterbilt 386 that is over pressurizing the cooling system and blowing coolant from the pressure relief cap... a block test has indicated c… read more
Curtis B.
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Peterbilt 387 2012 cummins isx engine.Head lights + Signals
Peterbilt 387 2012 cummins isx engine.Head lights + Signals stop working after few minutes. When I leave truck off for couple hours ,work again but goes off after few minutes.… read more
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Andy
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Hello I have a 2004 Volvo 780 tractor. when I run the self
Hello I have a 2004 Volvo 780 tractor. when I run the self test on the dash I get power supply 4. I al so need a wire diagram for the A/C system front the control unit to the compressor… read more
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truck /coach technician
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Peterbuilt trucks, my sons driving 2011, in the mid west.
Peterbuilt trucks, my son's driving 2011, in the mid west. He says his brakes are Squishy in the sub zero cold weather. Had it checked but found nothing, carrying 70,000lb. loads. Any Service bulletin… read more
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Chris (aka-Moose)

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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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