Emissions Diagnostics Services

Expert Troubleshooting for Diesel Emissions Systems

At Dale's APU Sales, we specialize in accurate diagnostics for all diesel emissions-related issues. Using advanced diagnostic equipment and leveraging our extensive experience, we can quickly identify and resolve problems with your DPF, DOC, and SCR systems. 

Comprehensive Diagnostic Services 

Check Engine Light Diagnostics
Our technicians can accurately interpret error codes and identify the root cause of emissions-related check engine lights, rather than simply clearing codes that will return. 

Performance Issue Diagnostics
We diagnose performance problems related to emissions systems, including: 

• Loss of power
• Poor fuel economy
• Excessive regeneration cycles
• Engine derating 

Preventative Diagnostics
Catch problems before they lead to costly repairs or downtime with our thorough emissions system inspection service. 

Advanced Diagnostic Equipment
We utilize multiple diagnostic platforms specifically designed for heavy-duty diesel emissions systems, allowing us to access detailed information about your system's performance. 

Common Emissions System Fault Codes We Diagnose

Our shop is equipped with multiple cutting-edge diagnostic tools specifically designed for emissions systems. This technology, combined with our technicians' expertise, allows us to accurately identify issues that other shops might miss. 

DPF System Codes 

• P2002: DPF efficiency below threshold 
• P2459: DPF regeneration too frequent
• P24A0: DPF differential pressure sensor performance
• P244A: DPF differential pressure too high 

SCR System Codes 

• P207F: Reductant quality performance 
• P208E: DEF injector circuit malfunction
• P20EE: NOx catalyst efficiency below threshold 
• P204F: Reductant system performance 

DOC/EGR System Codes 

• P0401: EGR flow insufficient 
• P0420: Catalyst system efficiency below threshold
• P0101: MAF sensor performance 
• P0299: Turbocharger under boost condition 

Diagnostic Process 

• Initial Consultation - We discuss the symptoms you're experiencing and any fault codes that have appeared. 
• System Scan - We perform a comprehensive scan of all emissions-related systems. 
• Data Analysis - Our technicians analyze live data to identify abnormal operating parameters. 
• Physical Inspection - We inspect related components for visible damage or issues. 
• Root Cause Identification - We determine the underlying cause, not just the symptoms. 
• Repair Recommendations - We provide clear options for resolving the issue permanently. 

Schedule Your Diagnostic Service

Don't let emissions system problems keep your truck off the road. Contact us today for expert diagnostics and solutions or request quote.