1999 Ford V10 Triton RV with Persistent P0171, P0174 and New P0401 Code - Should I Be Concerned?

Model: 1999 Ford V10 RV Fault Code: P0171 Posted: 2018-05-21 10:20

Hi everyone, I own a recreational vehicle (RV) powered by a 1999 Ford V10 Triton engine. For the past three years, I've been seeing diagnostic trouble codes P0171 and P0176 related to fuel mixture issues. Despite these recurring codes, my RV runs smoothly and has no noticeable performance problems. This week, a new code appeared: P0401, indicating a failure in the exhaust gas recirculation (EGR) system or insufficient exhaust flow. While I haven't noticed any symptoms like rough idling or reduced power, I'm wondering if this code warrants immediate attention or is simply a false positive. I'd appreciate insights from experienced users of 1999 Ford V10 Triton engines in RVs on how to interpret these codes and whether they could indicate underlying issues that need repair.