Emissions Services:
- Comprehensive emissions system diagnostics to identify causes of failed inspections and warning lights
- OBD system scanning on 1996 and newer vehicles to detect emissions-related fault codes
- Diagnosis of hydrocarbons, nitrogen oxides (NOx), and carbon monoxide emission issues
- Inspection and repair of components such as oxygen sensors, EGR valves, and evaporative emissions systems
- Catalytic converter testing and replacement when necessary to restore compliance
- Fuel and air mixture diagnostics to correct rich or lean running conditions
- Evaporative emissions leak detection and repair to prevent fuel vapor loss
- Emissions-related check engine light diagnosis and repair
- Exhaust and emissions system inspections to ensure proper operation and compliance
New Jersey follows some of the strictest vehicle emissions standards in the country. In order to protect air quality, vehicles are required to meet specific limits for hydrocarbons, nitrogen oxides, and carbon monoxide. If your vehicle does not meet these standards, it will fail inspection and must be repaired before it can be registered.
For vehicles manufactured in 1996 or newer, the inspection process checks your vehicle’s On-Board Diagnostic (OBD) system. If the check engine light is on or if the vehicle’s computer reports emissions-related faults, the vehicle will fail inspection. Older vehicles are tested using a dynamometer and exhaust probe to measure pollutant levels while the vehicle is running.
If your vehicle fails an emissions test, the solution may be as simple as replacing a sensor or correcting a minor engine issue. In other cases, more in-depth repairs may be required. Proper diagnostics are essential to identifying the true cause and fixing it correctly the first time.
Shade Tree Garage is fully equipped to inspect, diagnose, and repair emissions problems so your vehicle can meet New Jersey’s requirements and return to the road legally and safely.
Our Emissions Services
We offer a range of emissions-related services, including:
- Failed Inspection Diagnostics: We diagnose the specific reason your vehicle failed inspection by scanning fault codes and performing targeted system testing to identify emissions-related problems accurately.
- Check Engine Light and OBD Testing: Because most emissions failures are tied to warning lights and stored fault codes, we focus on identifying what triggered the alert and confirming the root cause before repairs begin.
- Catalytic Converter and Sensor Testing: Oxygen sensors, catalytic converters, and EGR components play a major role in emissions control. We inspect and test these parts to determine whether cleaning, repair, or replacement is needed.
- Engine Performance Analysis: Misfires, fuel mixture problems, and incomplete combustion can all increase emissions. We analyze engine performance to correct issues that contribute to failed tests.
Why Choose Us for Emissions Service?
- State-certified emissions repair facility
- Advanced diagnostic equipment for accurate testing
- Technicians experienced in NJ emissions standards
- Clear explanations and written estimates before repairs begin
We focus on correcting the problem properly, not just clearing codes to get you through inspection.
Schedule Your Emissions Service
If your vehicle has failed an emissions test or your check engine light is on, do not wait. Early diagnostics can prevent further damage and help you pass inspection more quickly.
Schedule your emissions service with Shade Tree Garage today. Our team is ready to evaluate your vehicle, explain your options, and complete the necessary repairs to restore compliance and performance.

Contact us to book your appointment or to ask any questions about emissions testing and repair.
