Q: "No bus" code

asked by on May 20, 2016

My truck wouldn't start and the fuel pump wouldn't do anything so I changed it , went to start it. It cracked but would not start and the dash went dead and the mileage started flashing "no bus" I did not notice this before but I already had assumed it was the fuel pump. I checked some connections but don't really know where to start or what to look for. Can you walk me through diagnosing and finding the issue? Thanks

My car has 140000 miles.
My car has an automatic transmission.

Car is not starting Inspection $94.99 - $114.99 Get a Quote

When the No Bus message appears in your instrument cluster, its usually an indication that there is a problem with the powertrain control module or the wiring to it. This is also very likely the cause of your no start concern. You will need to have the PCM tested as part of diagnosing the no start condition by a qualified technician, such as one from YourMechanic. If you want to try diagnosing the issue yourself, you could first try swapping the PCM with a known good unit with an identical part number from another vehicle and see if that helps.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $70/hr

What others are asking

How many airbags does my vehicle have?
Your vehicle is equipped with six airbags, which can greatly reduce injury or save your life in the event of an accident. Your vehicle has two front-impact airbags, two seat-mounted side-impact airbags, and two roof-mounted curtain side-impact airbags. Tips The...
Rough idle, thermostat code
I'm guessing the codes is P0128 Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) (https://www.yourmechanic.com/article/p0033-obd-ii-trouble-code-turbo-charger-or-supercharger-bypass-valve-control-circuit-by-john-nelson). The code and the symptoms you are experiencing may or may not be related. The powertrain control module (PCM) determines operating temperature via the signal...
Car shakes and the check engine light is on
Hello. If you have misfire codes on all of these cylinders, then the problem is much more in-depth. Most of the time when this occurs on one side of the engine, it is because the timing belt is worn out...
Break and quench (off)
You may have a bad or sticking idle air control valve. You need to have the computer checked for codes. The throttle body (https://www.yourmechanic.com/services/throttle-body-replacement) and idle air control valve (https://www.yourmechanic.com/services/idle-control-valve-replacement) should be thoroughly inspected. Resetting the idle speed will cause...
I need the name of the part that connects my driveshaft to my transfer case.
Hi there, thanks for your question. The part your are looking for is called the slip joint yolk. Best of luck!
Hard to start car, it seems flooded. Fires right up by using starting fluid.
The fact that you need to use starting fluid suggests you have a fuel delivery problem. Without knowing the year of your VW Beetle, this may tough to diagnose due to the fact that the earlier Beetles were carbureted models...
2004 Tahoe turn signal on and the headlights blink also.
Hi there. Check to see where you have grounded the wires to the lights on the front of the vehicle. It sounds like that all of the lights are being grounded on the same terminal. This is why the headlights...
No compression cylinder 1, car shakes/vibrates and runs rough, decreased gas mileage.
Yes, absolutely, rebuild or replace the engine. The vehicle itself is a recent model year so your least cost option will be to repair what you have. And, you're right, "re-sale value" is irrelevant in the calculation (good for you!)....
My clutch engages but my truck is still hard to get into gear 2003 Mazda B2300
Hi. It sounds like you are having a problem with the clutch hydraulic system. If the clutch appears to be engaging and not slipping then the hydraulic system is not fully disengaging the clutch which makes it hard to change...

Related articles

2012 Chevrolet Silverado vs. 2012 Dodge Ram: Which One Should I Buy?
When you are looking for a way to get a load of mulch or gravel, or need to haul a large trailer or boat behind your vehicle, chances are you are looking for a truck. Trucks are not meant to...
The Best Used Cars to Buy If You're an Undercover Cop
If If you're an undercover cop, when you choose a used vehicle, your main purpose is to look like anything but a cop. That means, of course, that an unmarked Crown Victoria is probably not the wisest choice. We’ve evaluated...
The Best Used Cars to Buy If You’re a Caterer
If If you are in the catering business, you need a reliable vehicle that will provide you with what you need to transport your food, linens, and other supplies. Generally speaking, you're better off buying gently used, because you will...