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P0306 on CHEVROLET TAHOE

Severity
Medium
NHTSA Reports
2
Most Affected
2021

What P0306 Means on Your CHEVROLET TAHOE

Real CHEVROLET TAHOE Owner Reports (Source: NHTSA Complaints Database)

"AFM lifter collapse on Cylinder 6 Written repair estimate or a Diagnostic report showing P0306 + lifter failure"

— 2021 CHEVROLET TAHOE owner • POWER TRAIN,ENGINE • Filed 12/22/2025

"While traveling on the highway one day, my 2021 Chevrolet Tahoe began warning lights on the dashboard. Shortly after, it running roughly,, and jerking, so I pulled over to investigate."

— 2021 CHEVROLET TAHOE owner • POWER TRAIN,ENGINE,LANE DEPARTURE • Filed 04/05/2025

Data from NHTSA Vehicle Complaints Database. All reports are filed by vehicle owners directly with the U.S. Department of Transportation.

Common Causes of P0306 on CHEVROLET TAHOE

50%
50%

Percentages based on NHTSA complaint component analysis for this vehicle.

Complaint Trend by Year

2021
2

What To Do Next

  1. 1
    Check for recalls on YOUR VIN

    Go to nhtsa.gov/recalls and enter your VIN. Free repairs if your vehicle is covered.

  2. 2
    Get a proper diagnosis

    A code alone doesn't tell you the exact failed part. A diagnostic at a shop ($50-$150) pinpoints the root cause before you spend money on parts.

  3. 3
    Compare repair quotes

    Get 2-3 quotes. Dealer vs independent shop prices often differ 30-50% for the same repair.

P0306 on Other Vehicles

Data sourced from the National Highway Traffic Safety Administration (U.S. Department of Transportation) and the SAE J2012 OBD-II standard. Code definitions follow the SAE J2012 / ISO 15031-6 standard. Owner reports are filed directly with NHTSA by vehicle owners. This information is provided for educational purposes only and should not replace professional automotive diagnosis. Always consult a qualified mechanic for vehicle repair decisions.

Last updated: March 2026