2020 Chevrolet Traverse Check Engine Light in Murray, UT

It means the 2020 Chevrolet Traverse’s computer stored an OBD-II trouble code (for example, P0442 or P0300) and switched on the malfunction indicator lamp to flag a fault.

This alert can be minor, like a loose fuel cap affecting the EVAP system, or more serious, such as a misfire or catalyst efficiency issue. Our Murray team reads codes and freeze-frame data, then verifies the cause with targeted testing. If you’re near Salt Lake City, you can schedule service for a same-visit diagnosis in most cases.

• Steady light = drive cautiously to service; flashing light = stop to prevent damage.
• We retrieve codes and operating conditions stored at the moment the fault set.
• Chevrolet-specific data helps isolate causes faster than generic readers.

Frequent causes include O2 sensor faults (P0131/P0151), EVAP leaks or a loose gas cap (P0442/P0455), mass airflow issues (P0101), catalyst efficiency (P0420), and ignition misfire (P0300).

On the 3.6L V6, small EVAP leaks and MAF performance codes are common in daily Wasatch Front driving. Misfires left unchecked can overheat the catalytic converter. Our technicians in Murray combine code data with smoke testing, fuel/air checks, and ignition testing to confirm the root cause—not just the symptom.

• Loose or worn fuel cap can trigger EVAP codes and emissions failures.
• MAF and O2 issues often show up as rough idle, hesitation, or poor MPG.
• Persistent misfires risk converter damage and higher repair costs.

If the light is steady you can drive cautiously to service, but a flashing light signals an active misfire and you should stop to prevent catalytic converter damage.

Plan a short, direct trip to our Murray location if the light is steady and the SUV drives normally. If it flashes or you notice rough running, power loss, or fuel smell, arrange a tow and schedule an appointment to avoid costly secondary damage. Our team can quickly triage and advise next steps.

• Steady MIL = service soon; flashing MIL = immediate attention needed.
• Reduce load: avoid towing and high RPM until diagnosed.
• We provide a written estimate before any repair work begins.

A parts store can read generic OBD-II codes for free, while our Chevrolet dealer performs full diagnosis with factory GDS2/MDI tools and OEM procedures to find the exact cause.

Codes point to systems, not parts; each code can have multiple root causes. Our technicians access Chevrolet-specific data, run bi-directional tests, and verify repairs with drive cycles. You’ll receive a clear plan and a written estimate, plus current service specials when available.

• Chevrolet factory scan access and guided diagnostics.
• Isolation testing (EVAP smoke, misfire, fuel/air, and sensor checks).
• Documentation of findings and next steps before any repair.

No — Utah OBD checks fail vehicles with recently cleared codes because readiness monitors show “Not Ready” until required drive cycles complete.

Simply erasing the light on a 2020 Chevrolet Traverse won’t fix the underlying fault and will delay inspection until monitors reset. We diagnose the root cause, complete repairs, and confirm monitors have run and passed. If you’re preparing for inspection around Salt Lake City, use our online scheduler for a diagnostic visit.

• Monitors like EVAP, O2, and catalyst must report “Ready.”
• A loose gas cap often sets EVAP codes; replace if seal is worn.
• We verify monitor status before you head to testing.

We frequently see P0442 (small EVAP leak), P0420 (catalyst efficiency), P0300 (random misfire), P0101 (MAF performance), and P0131 (O2 sensor low voltage).

These codes reflect fuel/air metering, evaporative emissions integrity, and combustion quality on the 3.6L V6. Ignoring them can reduce fuel economy and risk expensive catalyst damage. Our Murray service team confirms the exact fault with smoke testing, sensor pinouts, and road testing, then provides a written estimate.

• EVAP smoke test pinpoints small leaks quickly.
• MAF and O2 diagnostics verify sensor vs. wiring faults.
• Misfire isolation prevents converter overheating and failures.

Our diagnostic process is built for Utah driving and the greater Salt Lake City area we serve, including South Jordan, West Jordan, Midvale, and Sandy. Generic readers only display basic codes; our Chevrolet factory GDS2/MDI tools stream live data, run component actuations, and log freeze-frame conditions so we can recreate the fault. We validate suspected causes with EVAP smoke testing, ignition and fuel checks, and targeted circuit testing to confirm the repair path. Visit us at 5500 S State St, Murray, UT 84107 for professional diagnosis, or schedule service online. If repairs are recommended, we’ll review options and current service specials so you can make an informed decision.

We start with a quick interview to note symptoms, recent fuel stops, and driving conditions. Next, we retrieve OBD-II codes, review freeze-frame data, and check Technical Service Bulletins relevant to your 2020 Chevrolet Traverse. A visual inspection follows: fuel cap and EVAP lines, intake tract, wiring, connectors, and vacuum sources. Then we perform isolation testing as needed—EVAP smoke test, MAF and O2 sensor verification, misfire and ignition checks, and a confirmatory road test. You’ll receive a written estimate before any repair. We also share applicable service specials. Ready to move forward? Schedule service and we’ll get you on the calendar.

Many Traverse owners encounter a few repeat offenders: P0300 (random misfire), P0420 (catalyst efficiency below threshold), P0442/P0455 (small/large EVAP leak), P0101 (MAF performance), and P0131 (O2 sensor low voltage). Misfires and rich/lean conditions can overheat and damage the catalytic converter, turning a small fix into a costly repair. EVAP leaks often begin with a loose or worn fuel cap; left unresolved, they’ll trigger failed inspections and wasted trips to emissions testing. Addressing these codes early preserves fuel economy and drivability. Bring your 2020 Chevrolet Traverse to Larry H. Miller Chevrolet Murray in Murray for an accurate diagnosis — schedule service.