Brake Switch B Circuit
The MAXXFORCE-P0703 (MaxxForce) diesel fault code means: Brake Switch B Circuit. This is a moderate severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- beginner
- Estimated cost
- $40-$200
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View pilot availability →What Are the Symptoms of MAXXFORCE-P0703?
- Cruise inoperative
- CEL
What Causes MAXXFORCE-P0703? (Most Likely First)
- Failed brake switch Likely
- Misadjusted pedal switch Possible
Can I Still Drive with MAXXFORCE-P0703?
Yes, but fix soon. MAXXFORCE-P0703 is rated moderate severity. It is not an immediate stop-driving fault, but it will not clear itself — book the repair rather than ignoring it.
Frequently Asked Questions
What is P0703 on a MaxxForce DT (7.6L)?
P0703 on a MaxxForce DT (7.6L) (2007-2015) indicates: Brake Switch B Circuit. This is a known fault code on the MaxxForce engine family and typically points to the causes listed above.
Can I drive with P0703 on my MaxxForce?
Yes, you can generally drive with this code, but diagnose soon to prevent secondary damage.
How much does it cost to fix MaxxForce P0703?
Repair cost is typically $40-$200 depending on the underlying cause and shop rate. Many MaxxForce faults (especially EGR cooler, head bolt, and VGT repairs) are major expenses that drove fleet owners to repower with Cummins or retire these trucks early.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose MAXXFORCE-P0703?
Adjust or replace brake switch.
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines P0703 as a generic OBD-II code)
P0703 on Other Platforms
The same code ID appears across other engines, vehicles, and equipment. Diagnostic flow varies by platform — see the matching breakdown:
Which Vehicles Commonly Get MAXXFORCE-P0703?
- International 4300 DuraStar MaxxForce DT
- International 4400 DuraStar MaxxForce DT
- International 7300/7400/7500 WorkStar MaxxForce DT
- IC Bus CE-Series MaxxForce DT
- IC Bus RE-Series MaxxForce DT
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