P0306 on CHEVROLET TAHOE — Cylinder 6 Misfire Detected

Q: "What does P0306 mean on a CHEVROLET TAHOE?"

"P0306 indicates: Cylinder 6 Misfire Detected. This is a ignition system code. 2 CHEVROLET TAHOE owners have reported this to NHTSA."

Q: "What are the most common causes of P0306 on CHEVROLET TAHOE?"

"Based on 2 NHTSA reports, the most commonly cited components are: Power Train,Engine, Power Train,Engine,Lane Departure. These percentages are based on the component field in owner complaints."

Q: "Is P0306 serious on my CHEVROLET TAHOE?"

"Of 2 NHTSA reports for this code on CHEVROLET TAHOE, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic."

Q: "What should I do if my CHEVROLET TAHOE shows P0306?"

"1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare."

What P0306 Means on Your CHEVROLET TAHOE

P0306 is a diagnostic trouble code indicating: Cylinder 6 Misfire Detected. This code relates to the ignition system system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

2 CHEVROLET TAHOE owners have reported this issue to NHTSA across model years 2021. Most reports come from the 2021 model year. The most commonly reported component is Power Train,Engine (50.0% of reports).

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

All reports filed by vehicle owners directly with the U.S. Department of Transportation.

📊 Complaint Trend by Model Year

2

'21

Common Causes on CHEVROLET TAHOE

Based on NHTSA complaint component analysis for this vehicle.

POWER TRAIN,ENGINE 50%

POWER TRAIN,ENGINE,LANE DEPARTURE 50%

What To Do Next

1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. If your vehicle is covered, repairs are free.
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
Compare repair quotes
Get 2–3 quotes. Dealer vs. independent shop prices often differ 30–50% for the same repair.

Frequently Asked Questions

What does P0306 mean on a CHEVROLET TAHOE? ▾

P0306 indicates: Cylinder 6 Misfire Detected. This is a ignition system code. 2 CHEVROLET TAHOE owners have reported this to NHTSA.

What are the most common causes of P0306 on CHEVROLET TAHOE? ▾

Based on 2 NHTSA reports, the most commonly cited components are: Power Train,Engine, Power Train,Engine,Lane Departure. These percentages are based on the component field in owner complaints.

Is P0306 serious on my CHEVROLET TAHOE? ▾

Of 2 NHTSA reports for this code on CHEVROLET TAHOE, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic.

What should I do if my CHEVROLET TAHOE shows P0306? ▾

1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare.