Truck Year/Model/Engine: 2016 Freightliner Cascadia Detroit DD15
As I was driving NB on I-65 from Birmingham, AL, the MIL & Check Engine Light came on. So I pulled over and hooked up my scanner tool by OTR performance to see what the code was. Below you can see what the code says. Join me in the video below to see my experience dealing with this issue, and see what the cost of repairs was.
Scanner Tool I Use:
OTR Performance Tool ✅🔧 https://otrperformance.com/?ref=thegoldentrucker
FREE SHIPPING Coupon Code: THEGOLDENTRUCKER
Fault Code Overview
Video on how I dealt with the issue
Summary
1. Breakdown and Initial Diagnostics
– The driver experienced a breakdown with loss of power due to a fuel system issue (25% engine derate).
– Using an OTR diagnostic scanner, the error code **SPN 3662 FMI 5** indicated a problem with cylinder 4 injector amplifier control valve (wiring issue or low current).
– Additional troubleshooting revealed a second code (**SPN 3223 FMI 7**), related to a sensor failure.
2. Visit to Multiple Repair Shops
– The driver visited a Freightliner dealership but faced delays and high diagnostic costs.
– Instead, they opted for another shop that performed tests, including a compression test, and suggested the issue could be wiring-related.
– Ultimately, the problem was confirmed to be a faulty injector in cylinder 4.
3. Repair Process and Costs
– Repairs included replacing the injector and additional work for fuel line seals, totaling over **$3,000**.
– Labor costs were a significant portion, with mechanics charging over $200/hour.
– The driver negotiated with the service advisor to remove unnecessary charges, reducing the total cost.
4. Cost Breakdown and Concerns
– Diagnosis and repair tasks included injector testing, valve cover removal, and replacement of injector components.
– The injector kit cost $840, with added fees for miscellaneous supplies, environmental charges, and taxes.
– The driver criticized the shop’s practice of overcharging labor hours and miscellaneous fees.
5. Outcome and Final Thoughts
– The truck ran well after the repairs, with noticeable improvement in performance.
– The driver emphasized the importance of questioning repair charges to avoid being overcharged, particularly for owner-operators.
– Detailed repair costs and part numbers will be shared for reference.