EGR Position Sensor Performance
The MAXXFORCE-P0404-DT (MaxxForce) diesel fault code means: EGR Position Sensor Performance. This is a serious severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- intermediate
- Estimated cost
- $350-$1,200
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What Are the Symptoms of MAXXFORCE-P0404-DT?
- CEL
- Limp mode
What Causes MAXXFORCE-P0404-DT? (Most Likely First)
- Stuck EGR valve Likely
- Failed EGR valve position sensor Likely
Can I Still Drive with MAXXFORCE-P0404-DT?
Short distances only. MAXXFORCE-P0404-DT is rated serious severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.
Frequently Asked Questions
What is P0404 on a MaxxForce DT (7.6L)?
P0404 on a MaxxForce DT (7.6L) (2007-2015) indicates: EGR Position Sensor Performance. This is a known fault code on the MaxxForce engine family and typically points to the causes listed above.
Can I drive with P0404 on my MaxxForce?
Only drive short distances to reach a repair facility. Continued operation may cause further damage or progressive derate.
How much does it cost to fix MaxxForce P0404?
Repair cost is typically $350-$1,200 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.
What actually makes the computer set this EGR code?
California's heavy-duty OBD regulation sets the low-flow trip point where a decrease from the manufacturer's specified EGR rate would push NMHC, CO or NOx past 2.0 times the applicable standards, or PM past the standard plus 0.02 g/bhp-hr (Title 13 CCR 1971.1, section (e)(3.2.1)). Note the second route: it must also flag the case where the EGR system has hit its control limits and simply cannot reach the commanded flow — so this code can set with the valve working and the system still unable to deliver. This threshold comes from the heavy-duty OBD regulation, which covers 2010 and later heavy-duty engines. If your engine is in a pickup at or under 14,000 lb GVWR it is certified under the separate medium-duty rule instead, so treat this as the design intent rather than your engine's exact limit.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose MAXXFORCE-P0404-DT?
Command EGR valve sweep and watch feedback.
Replace EGR valve assembly.
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- California Code of Regulations, Title 13 section 1971.1 (Heavy-Duty OBD)malfunction criteria, section (e)
Which Vehicles Commonly Get MAXXFORCE-P0404-DT?
- 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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