Get an Honest Answer for Your Check Engine Light.
We use professional OBD-II scanning to give you same-day results, honest pricing, and a 10,000-mile warranty on all repairs.
Professional check engine light diagnosis you can trust
When your check engine light comes on in Newark, don’t panic. EPR Auto Clinic provides expert OBD-II diagnostic services to quickly identify the root cause of your vehicle’s issues. Our experienced technicians use state-of-the-art diagnostic equipment to pinpoint problems accurately, saving you time and money on unnecessary repairs.
Located at 307 Chestnut St in Newark, NJ, we’ve been serving the Newark community since 2018 with transparent pricing and reliable automotive diagnostics. We understand that check engine lights can be stressful, especially in Newark’s stop-and-go traffic conditions that often trigger emissions-related issues.
Common check engine light codes we diagnose in Newark
P0420/P0430 - Catalytic Converter Efficiency
Most common in Newark: Urban stop-and-go driving accelerates catalyst wear. Repair cost: $800-$2,500
P0171/P0174 - System Too Lean
Cold weather impact: Vacuum leaks and sensor issues common in Northeast climate. Repair cost: $200-$800
P0440-P0457 - EVAP System Leak
Weather-related: Temperature cycling damages vapor system components. Repair cost: $150-$600
P0128 - Coolant Thermostat
Cold climate failure: Thermostats stick open in cold weather. Repair cost: $150-$500
P0300-P0308 - Engine Misfire
Winter startup issues: Cold weather causes ignition system problems. Repair cost: $100-$1,000+
P0401 - EGR Flow Insufficient
High-mileage vehicles: Common in Newark’s older vehicle population. Repair cost: $200-$600
🚨 STOP DRIVING IMMEDIATELY
- Flashing check engine light: Active engine misfire causing catalytic converter damage
- Loss of power: Significant performance reduction
- Other warning lights: Oil pressure, temperature, or charging system warnings
- Unusual sounds: Knocking, grinding, or severe rough idle
Why Newark chooses EPR Auto Clinic for check engine diagnostics
No-charge code reading
Unlike many shops that charge $100+ for basic code reading, we provide free OBD scanning. You only pay when we find and fix the actual problem.
Advanced diagnostic equipment
We invest in professional-grade diagnostic tools and component-specific testers for accurate diagnosis. Installation of new components to restore control and comfort to your vehicle.
Newark-specific expertise
We understand local driving conditions – from Ironbound District traffic to winter road salt damage – and how they affect your vehicle’s systems.
Multilingual service
Our team serves Newark’s diverse community with Spanish and Portuguese language support for clear communication about your repairs.
Emissions testing preparation
New Jersey requires annual inspections. We ensure your vehicle passes emissions tests by addressing check engine light issues properly.
10,000-mile warranty
All diagnostic work and repairs are backed by our comprehensive warranty, giving you confidence in our solutions.
Our Simple Process
Visual inspection and code retrieval
We start with a comprehensive visual inspection and retrieve all diagnostic trouble codes from your vehicle’s computer system using professional OBD-II scanners.
Technical service bulletin research
Our technicians research manufacturer-specific technical bulletins for known issues related to your vehicle’s make, model, and year.
Component testing and verification
We perform actual testing of suspected components using multimeters, oscilloscopes, and specialized diagnostic equipment to verify the root cause.
Road testing and monitoring
When necessary, we conduct road tests while monitoring live data to identify intermittent issues that may not show up during static testing.
Detailed explanation and estimate
We provide clear explanations of the problem, necessary repairs, and transparent pricing before any work begins.
⚠️ SCHEDULE SERVICE SOON
- Solid yellow light: Emissions-related issue detected
- Normal performance: Vehicle drives normally but light remains on
- No other symptoms: No unusual sounds, smells, or performance issues
Action: Schedule diagnostic within 1–2 weeks. Safe to drive short distances.
Specializing in the Brands You Trust
We have extensive experience with the most popular vehicles in the US, including their hybrid models.
We know their common issues and the ideal solutions for each one.
Get your check engine light diagnosed today in Newark
Visit Us or Get in Touch
- 307 Chestnut St, Newark, NJ 07105
- (973) 392-6830
- eprautoclinic@gmail.com
- Monday to Friday: 8:00 AM – 5:30 PM
Frequently asked questions about check engine light diagnostics
How much does check engine light diagnostic cost in Newark?
At EPR Auto Clinic, we provide free basic code reading. We only charge for repairs, not diagnosis. If advanced diagnostic testing is needed beyond basic code reading, complete testing starts at $120. Many other Newark shops charge $100-150 just to read codes.
How long does a check engine light diagnostic take?
Basic code reading takes 5-10 minutes. Complete diagnostic testing typically takes 1-3 hours, depending on the complexity of the issue.
How long does the service take?
Usually between 30-45 minutes for complete change with inspections. Could be faster if there’s no line. We take the opportunity to check other components and alert about any problems.
Can I drive with my check engine light on in Newark?
If the light is solid (not flashing) and your car runs normally, you can drive short distances. However, if the light is flashing, stop driving immediately to prevent severe engine damage. Call us at (973) 344-4699 for immediate guidance.
Will my car pass NJ inspection with check engine light on?
No. New Jersey requires the check engine light to be off and all emission monitors to be “ready” for inspection passage. We can diagnose and repair issues to ensure your vehicle passes state inspection.
What's the difference between code reading and actual diagnosis?
Code reading identifies where the problem is located (like “oxygen sensor circuit”). Actual diagnosis determines the root cause – whether it’s the sensor itself, wiring, or another component causing the sensor to malfunction. We provide both services to ensure accurate repairs.
