SPN 84 FMI 3 means accelerator pedal position voltage is above normal. Learn the symptoms, common causes, how to diagnose it with a diesel diagnostic laptop, and the fix.
TMC 2026 Annual Meeting recap — from enterprise diagnostic giants to driver-focused tools. Proformance was on the floor in Nashville to show there's a better way.
Deep dive into 2025 NOx sensor architecture, components, and SCR integration for Euro 7, EPA HD 2027, and CARB HD Omnibus heavy-duty diesel trucks.
Master the 9 essential components of diesel aftertreatment systems for 2025. Learn how to diagnose issues, prevent downtime, and meet EPA emission standards.
Learn how to diagnose diesel engine problems by observing smoke color - black, white, or blue smoke indicators.
Is it safe to keep a Bluetooth OBD2 scanner connected while driving your diesel truck? Learn the risks, benefits, and best practices for using ProformanceLink continuously.
Learn how to choose a heavy-duty truck scanner based on vehicle compatibility, fault codes, live data, DPF regeneration, updates, support, and total cost.
Compare Proformance Link, OTR Diagnostics, and Diesel Decoder for fault codes, live data, forced DPF regen, coverage, subscriptions, and total cost.
Learn how DPF regeneration works, the difference between passive, active, parked, and forced regen, and what to check before starting a diesel truck regen.
Compare JPRO, Cummins INSITE, Autel MS909CV, Proformance Link, OTR Diagnostics, and Diesel Decoder by price, coverage, functions, and best use.
Learn how to decode the 17-character VIN: what each digit means, how to identify model year, engine, and plant, and why decoding matters before you buy or repair.
A practical guide for fleet operators and heavy-duty truck owners to optimize oil change intervals based on driving conditions and oil type.
Essential diagnostic data every driver and shop needs to know for preventive maintenance and avoiding costly downtime
SPN 84 FMI 3 means accelerator pedal position voltage is above normal. Learn the symptoms, common causes, how to diagnose it with a diesel diagnostic laptop, and the fix.
Stay up to date with exclusive deals, news, and the latest updates — delivered straight to your inbox.
Every week you wait could cost you hundreds in unnecessary shop bills.
JOIN NOW →
© 2026 Proformance. All Rights Reserved.
