Q: "No bus" code

asked by on

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.

A: When the No Bus message appears in your ins...

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.

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: what size is my serpentine belt - 2003 Dodge Dakota

Hello. According to my resources, the serpentine belt size for your vehicle with the 3.9 liter engine is 97.3 inches long and 0.96 inches wide. The belt should also have seven grooves in it. The Dayco part number for this...

Q: When engine is cold it studders and misses but when warm it runs juss fine no codes and engine light isnt on why is this happening

When an engine is cold it will need more fuel to run correctly. I would recommend having the fuel injection system cleaned to see if it helps to run better. If the flush does not work then a scan will...

Q: Hissing noise from the transmission?

Hello there. A few different faults could cause the vehicle to have a noise from the shifter area. The most common would be the flywheel, transmission input shaft bearing, low fluid level or the torque converter. A qualified technician, such...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.