EGR Position Sensor Performance
What does MAXXFORCE-P0404-DT mean?
The MAXXFORCE-P0404-DT (MaxxForce) diesel fault code means: EGR Position Sensor Performance. This is a serious severity code.
Common Symptoms
- CEL
- Limp mode
Probable Causes (Ranked by Likelihood)
- Stuck EGR valve Likely
- Failed EGR valve position sensor Likely
Step-by-Step Diagnostic Procedure
Command EGR valve sweep and watch feedback.
Replace EGR valve assembly.
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.