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I have a no bus code on the dash and a check engine light,

Customer Question
I have a no...

I have a no bus code on the dash and a check engine light, the car wont start...... i replaced the crank sensor and tried a different pcm and still no go

Mechanic's Assistant: Does the light stay on, or does it blink?

The check engine light stays on after ive tried to start it

Mechanic's Assistant: What is the model/year of your Dodge?

It is a 1999 slt with the 5.9

Mechanic's Assistant: Are you fixing your vehicle yourself? What have you tried so far?

Yeah i am doing it myself. i have dont the crank sensor and a different pcm so far. also i check the ground wires and fuses.

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

That pretty much covers it!

Submitted: 9 months ago.Category: Dodge
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Answered in 7 minutes by:
9/9/2017
Dodge Mechanic: Amedee, Dodge Technician replied 9 months ago
Amedee
Amedee, Dodge Technician
Category: Dodge
Satisfied Customers: 28,006
Experience: ASE certified tech advanced level specialist. Wisconsin certified emissions state inspector
Verified

Hello and welcome!

My name isCustomerand I can assist you with your question.

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Dodge Mechanic: Amedee, Dodge Technician replied 9 months ago

I am very sorry your having this issue with your vehicle.

I will try my best to answer all of your questions.

However, before we get started, please let me mention a few things.

1. If at any point you would like to speak on the phone, please feel free to request a phone call on your end and I can call you right away.

2. If you dont understand any technical terms or anything that I mention (component tests or theory or operation), please let me know and I will provide you with a more in debt explanation or answer.

3. Please understand that I am here to help.

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Dodge Mechanic: Amedee, Dodge Technician replied 9 months ago

Are you looking for some possible causes or would you like me to walk you through this diagnoses?

Would you be willing to speak on the phone?

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Customer reply replied 9 months ago
some possible causes. im fairly handy with a wrench but this one has me stumped! i cant talk on the phone unfortunately, im at work right now
Dodge Mechanic: Amedee, Dodge Technician replied 9 months ago

NO problem.

Does the TPS receive a 5-volt reference from the PCM with the key on?

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Dodge Mechanic: Amedee, Dodge Technician replied 9 months ago

I will be honest with you, this is a VERY complex issue. There are a lot of factors and possible causes as to what could be causing this issue. It would be best to speak on the phone. I can wait till you have time later today on break or even after you get off of work.

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Customer reply replied 9 months ago
To be honest im not sure, i havent checked that. how would i go about that?
Dodge Mechanic: Amedee, Dodge Technician replied 9 months ago

You would use a voltmeter to check for this 5 volt reference on the wires going to the TPS with the key on.

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Customer reply replied 9 months ago
i may be able to call after work, i know its a tough issue, thats why im here. theres so much online.... ok i can do that. lets say it is getting 5 volts what next?
Dodge Mechanic: Amedee, Dodge Technician replied 9 months ago

Then we check the inputs to the PCM (powers and grounds)

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Customer reply replied 9 months ago
ok. i checked and cleaned all the grounds, i even tried a different PCM and still got the no bus code as well as no start.
Dodge Mechanic: Amedee, Dodge Technician replied 9 months ago

Thank you for that information.

I will be looking forward to speaking with you on the phone after work.

Talk to you then.

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