2021 Chevrolet Traverse Check Engine Light in Murray, UT

It means the Traverse’s OBD-II system detected a fault and stored a diagnostic trouble code (DTC) for the affected system.

The 2021 Chevrolet Traverse monitors engine, fuel/air, and emissions components; when something falls outside spec, a DTC is saved. Our GM-certified team in Murray can retrieve live data and freeze-frame details to see what happened. Addressing the light promptly helps protect performance and fuel economy on your daily I-15 and Wasatch Front drives.

• Systems commonly flagged: EVAP, oxygen sensors, MAF, ignition/misfire
• Next step: schedule a professional diagnostic via schedule service
• Quick check: ensure the gas cap is tight until it clicks

Common causes include an EVAP leak (often a loose gas cap), O2 sensor faults, MAF issues, engine misfires, or a catalytic converter efficiency code.

On the 3.6L V6, fuel-trim and emissions systems are closely monitored. Utah temperature swings can reveal small EVAP leaks, while airflow or sensor drift may trigger MAF or O2 codes. Our Murray shop confirms the exact cause with smoke testing, live data, and pinpoint tests so you avoid parts swapping.

• Typical codes: P0442 (small EVAP leak), P0101 (MAF performance), P0420 (catalyst efficiency)
• Misfire codes (e.g., P0300) may indicate ignition or fuel delivery concerns
• We provide a written estimate before any repair is made

A steady light usually means you can drive cautiously to service, but a flashing light means stop driving to prevent catalytic converter damage.

If your Traverse drives normally with a steady light, reduce load and head to our Murray location for diagnosis. If the light flashes or you notice rough running, loss of power, or fuel smells, arrange a tow. Continued driving with an active misfire can overheat and damage the catalytic converter.

• Flashing light = active misfire; avoid driving and seek assistance
• Monitor for rough idle, hesitation, or poor fuel economy
• Book an inspection now: schedule service

Dealer diagnostics go beyond a code read by using GM factory scan tools, guided tests, and service bulletins to identify the exact root cause.

Parts stores can read a code, but a single DTC can have multiple causes. Our OEM-trained technicians in Murray access proprietary GM data, perform smoke tests for EVAP leaks, and verify repairs with live data and drive cycles. You get a precise diagnosis and a clear, written estimate before work begins.

• Factory scan tool access and up-to-date GM technical information
• Isolation testing (e.g., EVAP smoke test, sensor pin-out, fuel/ignition checks)
• Written findings and repair plan before any parts are installed

No—clearing codes resets OBD-II readiness monitors, and Utah inspections can fail if monitors aren’t complete.

Simply erasing the light doesn’t fix the underlying fault and often delays readiness. Our Murray service team repairs the cause, verifies monitor status, and confirms the light stays off. This approach helps you avoid re-tests and keeps your Traverse running efficiently.

• Readiness monitors must complete after proper repairs
• We verify monitor status with a post-repair drive cycle
• See current offers before you book: service specials

It signals an active engine misfire that can overheat the catalytic converter and requires immediate attention.

Flashing indicates the fault is happening now, often from a failing ignition coil, spark plug, or injector. To prevent converter damage and higher repair costs, have the Traverse towed to our Murray shop for testing. We’ll confirm the cylinder and cause with live data and targeted checks.

• High risk of catalyst damage if you continue driving
• Common causes: ignition faults, fuel delivery issues, or vacuum leaks
• Arrange a prompt diagnosis: schedule service

We start with an OBD-II scan to capture stored and pending codes, then review freeze-frame data to see operating conditions at the moment the fault set. Next, a technician performs visual checks for loose connections, intake and vacuum issues, and damaged hoses. If an EVAP leak is suspected, we use a smoke machine to pinpoint the source. Airflow or sensor concerns are verified with live-data analysis and pinpoint tests. After isolating the cause, youll receive a written estimate before any repair. Once approved, we complete the fix, confirm the light stays off, and verify readiness monitors. For convenience, you can schedule service online and review service specials to plan your visit.

Larry H. Miller Chevrolet Murray serves the greater Salt Lake City area, including South Jordan, West Jordan, Midvale, and Sandy, with GM-specific diagnostic capability. Our factory scan tools read proprietary modules and live data that generic readers miss, enabling accurate testing for EVAP leaks, misfires, airflow concerns, and more. Along the Wasatch Front, cold starts in winter and temperature swings can reveal marginal sensors or small EVAP leaks, so we verify causes with smoke testing and guided procedures. Visit us at 5500 S State St, Murray, UT 84107 for directions and check in at our Service Center. Have questions or ready to book? Use our online portal to schedule service and explore current service specials before you arrive.

Traverse owners most often see EVAP and airflow-related codes: P0442 or P0455 indicate small or large EVAP leaks (gas cap, hose, purge/vent valve), while P0101 flags MAF performance and P0171 signals a lean condition. Misfire codes like P0300 point to ignition or fuel issues that can overheat the catalytic converter if ignored. P0420 denotes catalyst efficiency below threshold, often caused by prolonged misfires or upstream sensor faults. Leaving these unaddressed can increase fuel use and raise repair costs. Bring your 2021 Chevrolet Traverse to Larry H. Miller Chevrolet Murray in Murray for an accurate diagnosis — schedule service.