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I have a 2002 dodge dakota getting a no bus in odometer. Replaced Pcm worked fine for 1 year the no bus came back what else could it be?

Posted by Terry Rey Valverde on

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Paul's Auto Repair LLC

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  • 38 Answers

Main input sensors, wiring, and blown fuse can cause this concern. 20 amp fuse under the hood might be blown, but if it is would cause a no start concern. The wires that run along drivers side frame, Injector harness, and back of engine near firewall were all problem areas for wire chafing. Also, unplugging ect sensor, map sensor, cam, crank, TPS, and vss sensor may bring bus back. Unplug 1 at a time and monitor if it corrects the problem. Chrysler wired this circuit in series and one bad one can bring down the whole deck of cards. Keep posting if this does not help

Posted on Jan 27, 2019

  • Paul's Auto Repair LLC Jan 27, 2019

    Main input sensors, wiring, and blown fuse can cause this concern. 20 amp fuse under the hood might be blown, but if it is would cause a no start concern. The wires that run along drivers side frame, Injector harness, and back of engine near firewall were all problem areas for wire chafing. Also, unplugging ect sensor, map sensor, cam, crank, TPS, and vss sensor may bring bus back. Unplug 1 at a time and monitor if it corrects the problem. Chrysler wired this circuit in series and one bad one can bring down the whole deck of cards. Keep posting if this does not help

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5 Related Answers

Anonymous

SOURCE: no BUS on odometer

I used to have the NoBUS show up on the odometer also, but always while driving. The immediate fix was a sharp rap on the top of the cluster with my fist. To fix it permanently, I removed the cluster,cleaned the contacts both cluster and harness with spray contact cleaner, then applied some dielectric grease to prevent any further corrosion.

HTH

Posted on Jul 01, 2008

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Anonymous

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SOURCE: odo'no bus after mileage flashes four times 99 dodge dakota

Clean your negative battery cable end and battery post. The "no bus" usually is caused from a bad ground.

Posted on Dec 21, 2008

Anonymous

  • 1 Answer

SOURCE: 2001 dodge dakota crank no start

Just had that problem w/ my 01 Dekota, it was the resistor that used to be mounted on the firewall and easy to get to but that is now mounted low on the back of the engine jammed into a bey tight position. I couldn't get to it myself, so ended up taking it to neighborhood garage. Cost me about $150

Posted on Apr 16, 2009

chryslerguy

  • 323 Answers

SOURCE: No Bus Error

All the modules are connected together to communicate with each other via the PCI bus. It is possible that one of the modules is pulling the bus down.Since the vehicle won't start it could be any one of the modules. It will be a process of elimination to find the faulty one by disconnecting them one at a time. Here are a few, powertrain control module (the one you replaced) Instrument cluster, overhead console, anti-lock brakes, airbag. Since the cluster unplugged wont read anymore, just try to start the vehicle to see if that was the one. Otherwise see if the odometer message of "no bus" goes away after each one is unplugged.

Posted on Apr 24, 2009

mcgyver468

Mark L. Roberts Jr.

  • 710 Answers

SOURCE: 2002 chrysler sebring no buS on odometer...

THIS COMMUNICATION FAILURE COULD BE AS SIMPLE AS A BLOWN FUSE UNDER THE DASHBOARD, OR UNDER THE HOOD. CHECK IT OUT. HOPE THIS HELPS. THANKS IN ADVANCE FOR AN HONEST RATING. AND FOR USING FIX-YA. BEST OF LUCK

Posted on May 10, 2009

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1 Answer

03 Dakota no bus no start 3.9 disconnected all sensors still no bus?


There have been several proposed fixes for this, but nothing works for every case. You can check that the ground wires are properly grounded (pins 31 and 32 on connector #1, black wires with tan tracer). Or you may need to replace the PCM. See the link from YouTube.
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Have your replaced the gauge ? (instrument cluster ) Do you know how it works ? Do you know what Chrysler CCD serial data communication is ? All the modules ,including the instrument cluster , PCM , BCM , share info on this data bus . The sensors you replaced are inputs to the PCM . The PCM sends this info on the data bus for the other modules .If your vehicle runs an shifts good it's not the sensor or the data bus ,if there was a problem with the data bus you would see a message on the instrument cluster NO BUS . You need a new cluster ! http://www.cnblogs.com/shangdawei/p/3570499.html

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I have a 02 dodge Dakota 4.6L 4 door that wont start. I have a "no bus" indicater on my dash. Fuel pump wasn't coming on, so replaced it and it still wont start.. HELP PLEASE!


A no bus indication usually means something is going on with the PCM. Sometimes it is just a loose or damp connector. You can disconnect the battery, remove, clean, inspect, and reattach the PCM connectors, reconnect the battery and retest. If that doesn't work, get it to a repair shop or dealer.

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2002 dodge dakota slt 4x4 4.7 ltr key on eng off all lights come on on the ipc then go off after 15 sec start to come on one by one then odo blinks 4x goes to no bus. Vehicle starts and runs fine no ecm...


with no bus, that is power to or from the pcm. try wiggling the 3 plugs at the pcm with the key on. if you see lights change, or hear the bing, that would most likely be the pcm.

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1 Answer

My 03 dodge 3500 5.9. is showing a no bus error code on odometer the truck starts fine but gauges aernt working


The BUS is not part of the PCM/ECM it is on the body control module (BCM). It effects radio and dash most noticeably. Has no effect on powertrain.

Jan 16, 2014 | 2001 Dodge Ram 3500 Truck

1 Answer

Starts and runs but dies in about a minute think it may be fuel pump also the odometer says no pump 01 dakota 4cylinder 81,000miles


Hi.

Before replacing the pump, test the pump thoroughly. The symptoms you are describing are often caused by a PCM problem (odometer to zero, fuel pump warning, sometimes "No Bus" P16xx OBD code doing code scanning and CEL warning).

THe PCM is the main computer module, and among other things send power and data to odometer through a data connection called BUS, and controls the pump.
The pump can be tested energizing it directly and checking if it works without problem for a while. There is no need for testing fuel pressure because the problem is electrical.
If the pump is OK, then problem is PCM.

The PCM is expensive (about $800). The replacement is not expensive (one hour garage or so). The PCM is under warranty for the first 80K miles and 8 years. Since the warranty on the part is just over, I suggest talking to your local dealer before starting any repair or before replacing any part.

If you haven't done it yet, do also an OBDII code scanning. If you drive to the nearest Autozone you can scan the PCM for error codes free of charge.

Here one of the several discussion pages on the problem available online.

Regards.

Ginko.

Jan 02, 2011 | Dodge Dakota Cars & Trucks

1 Answer

Odometer reads no bus


check bulkhead connecter for corrosion, cluster is your body controll module, losing signal to fuel pump module , and pcm, thios is a communication issue, volt meter wil help, back probe diagnostic connecter, pin 7, white wire, to see if signal is there, GOOD LUCK RDJRP

Jul 16, 2009 | 1999 Dodge Ram

1 Answer

Dodge Dakota no Bus, code 940 on Gauge!


I have a 2003 Durango 4.7 and had the same problem
The no bus code on the odometer means a faulty connection to your PCM, try turning the key to try to start it, then waiting 20-25 minutes and trying again, if it starts after that, then you need a new PCM, which is what happened to me. If it doesnt start, try waiting an hour or longer then trying it, also try replugging-in the cables to the PCM, when you look at the front of your engine, the PCM should be on the extreme left with several cables and a bracket connected.
Hope this helps!
David W.
nypd.swat at gmail.com

Mar 22, 2009 | 2000 Dodge Durango

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