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Bully Dog Big Rig Heavy Duty WatchDog Engine Monitor - ECM Controlled Engines w/ 6 or 9 Pin Data Port

Thoroughbred Sku #: BUL46501
Manufacturer Sku #: 46501

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Prop 65:
WARNING: Cancer & Reproductive Harm - P65Warnings.ca.gov
Shipping Restrictions:
This part is NOT available to ship to the state of California.



Product Details

Product Name: Bully Dog Big Rig Heavy Duty WatchDog Engine Monitor - ECM Controlled Engines w/ 6 or 9 Pin Data Port
Manufacturer: Bullydog
Manufacturer Part #: 46501
Thoroughbred Diesel Part #: BUL46501

Bully Dog 46501 Heavy Duty WatchDog is a multi-functional digital gauge pack that will help you develop fuel saving driving habits and provide you with monitoring capabilites to keep track of vital engine functions. Fleet owners, fleet managers and owner operators can use the WatchDog as a tool for improvement and a tool for analysis; the WatchDog will allow you to record and download trip information into an Excel spreadsheet. The WatchDog also packs some very important features that drivers, in the past, have paid big bucks for like the ability to run vehicle diagnostics and the ability to change the top speed limiter. Features like these come standard on the WatchDog along with many more.

Speed Limiter Adjustment

The Bully Dog Watch Dog speed limiter adjustment allows you to adjust your top speed limit in the engine computer. This is perfect for those needing to adjust speed limits to remain compliant in any state or province. Avoid costly change fees and fines, the Watch Dog does it all. (Excludes Paccar MX-13)

Gauges & Safety Warnings

The Heavy Duty WatchDog can monitor up to four parameters at once! This helps prevent unsafe engine temps and paramteres. If those temps do go up, you'll instantly be notified via user defined visual and audbile alerts.


Avoid the costs and downtime of bringing your truck to the shop. The Watch Dog will read and clear diagnostic trouble codes allowing you to perform vehicle diagnostics without having to be at the shop.

Bully Dog Big Rig Heavy Duty WatchDog Engine Monitor Features:

  • Multi-Function Gauge Display 
  • Read & Clear Diagnostic Trouble Codes
  • Set User Defined Warnings & Audible Alerts
  • For more information on Bullydog call us at 1-859-737-4966

Parameters Monitored:

  • Speed
  • RPM
  • Boost
  • Throttle
  • Load 
  • Battery V
  • Coolant 
  • Intake Temp 
  • Oil Temp
  • Oil PSI 
  • Turbo EX Temp 
  • Fuel Rate 
  • Inst Econ
  • Avg Econ
  • Trip Dist
  • Trip Fuel
  • BD Aux 
  • BD Pryo 1 & 2
  • Truck Pyro 1 & 2


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