ENCINA POWER INC. — Chicagoland Regional Division · I-55 / I-80 / I-294 Corridors
Fully Insured · $2,000,000 Commercial Liability
Diagnostic & Electrical Repair
Find the Fault. Fix It Right the First Time.
Heavy-Duty Diagnostics and Electrical Repair, On-Site
No-starts, flickering lights and fault codes that keep coming back can eat a whole shift of guesswork. Our mobile diesel mechanics bring dealer-level diagnostic equipment to your yard or the roadside, trace the problem to its source and fix it there.
What We Do
Heavy-Duty Diagnostics and Electrical Repair
ECM / TCM Diagnostic Health Scans
Full sweeps of engine and transmission control modules for active and stored faults, before they turn into a breakdown.
Heavy-Duty Computer Diagnostics
Troubleshooting of powertrain and emissions electronics on Cummins, Detroit, PACCAR and Volvo platforms.
Battery & Alternator Service
Battery load analysis, alternator output testing and battery replacement to stop repeat dead starts.
Starter System Repair
Starter draw testing and repair to get no-start trucks running again.
Lighting & Wiring Diagnostics
Chassis and trailer wiring checks that clear lighting defects before a DOT inspection finds them.
ABS Sensor & Wiring Repair
Diagnosis and repair of ABS sensors, wiring and chassis electrical systems on tractors and trailers.
Fault-Code Monitoring (Tier 3)
Live Samsara and Geotab monitoring flags fault codes as they happen, as part of the Zero-Downtime Guarantee.
Why Diagnostics Matter
Parts Swapping Isn’t a Repair Strategy
Guessing and replacing parts until the problem goes away leads to repeat failures, recurring codes and DOT violations. A proper diagnosis costs less than three wrong parts and a second tow.
The Truck That Won’t Start
A dead battery is often a symptom, not the cause. We test battery load, alternator output and starter draw to find what’s actually draining it.The Code That Keeps Coming Back
Clearing a code buys a few days at best. We trace it to the sensor, harness or module that’s setting it.The Light That Fails Inspection
When a new bulb doesn’t fix it, the fault is in the chassis or trailer wiring. We find it and repair it.
Diagnostics FAQ
Diagnostic and Electrical Questions
Can you diagnose electrical problems on the roadside?
Yes. Our mobile units troubleshoot no-starts, charging problems and fault codes in your yard or at the roadside.
Our truck keeps killing batteries. Can you find out why?
Yes. We test battery load, alternator output and starter draw to find the root cause, so you’re not replacing batteries every month.
Do you repair trailer wiring and lights?
Yes. We diagnose and repair trailer and chassis wiring, lighting and ABS wiring on tractors and trailers.
Is the ECM health scan included in any PM?
Yes. An ECM/TCM diagnostic sweep is included with PM-C service. Fleets can also request scans on their own as part of a maintenance program.
Will I see what you found?
Yes. Findings are documented with photos and video in your Fullbay fleet portal and sent to you before any repair is authorized.
Commercial Fleet Services
Commercial Fleet Services Built for Uptime
From scheduled PMs to roadside breakdowns, our mobile diesel mechanics handle commercial truck repair for high-utilization fleets, regional carriers and terminal operations across Chicagoland and Will County.
On-Site Fleet Maintenance
PM-A, PM-B and PM-C service at your terminal during off-hours. No deadhead miles, no driver shop hours.
24/7 Mobile Diesel Repair
Fully equipped mobile units with diagnostics, welding and commercial parts inventory to fix roadside failures on site.
Mobile DPF Regeneration & Emissions
On-site forced regens and emissions diagnostics for Cummins, Detroit, PACCAR and Volvo engines.
Diagnostic & Electrical Repair
ECM / TCM health scans, battery and alternator testing, starter repair and ABS wiring diagnostics.
Air Brake, Suspension & Air Systems
Inspection, rebuilds and emergency repair of air brake components, wheel ends, steering linkage and trailer air suspension.
Mobile Welding
Heavy welding capability on every mobile unit, plus emergency roadside hose swaps.
Trailer Repair & Maintenance
Structural PMs for dry vans, reefers and flatbeds, from landing gear and doors to floors, lighting and brakes.
DOT Inspection & Compliance
Annual DOT inspections and pre-DOT audits that catch out-of-service defects early, with audit-ready records.
Will County and Chicagoland
Staged Where Freight Moves
From our Romeoville and Will County hub, we deliver on-site fleet maintenance and heavy duty truck repair along the I-55, I-80, I-355 and I-294 corridors. Whether your trucks sit at an Elwood intermodal yard or a distribution hub in Bolingbrook, our service units come to you.
Stop Chasing Electrical Gremlins
Truck down now? Call dispatch. Want to catch electrical faults before they strand a driver? Start with a complimentary yard audit.
Next Steps
Request Your Complimentary Fleet Yard Audit
Tell us about your fleet and we’ll schedule a 50-point yard audit at your location. Every finding is documented, and you’ll receive a customized fleet maintenance proposal built around your units. No cost and no obligation.
Dispatch 24/7
+1 (312) 274-3347
Roadside emergencies and urgent repairs
Email
[email protected]
Billing, DOT records and account support
ENCINA POWER INC. — Chicagoland Regional Division
Zero-Downtime Fleet Maintenance. 24/7 Mobile Repair & On-Site PMs for Class 6-8 fleets across the I-55, I-80 and I-294 corridors.
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