P0300 on CHEVROLET IMPALA — Random/Multiple Cylinder Misfire Detected

Q: "What does P0300 mean on a CHEVROLET IMPALA?"

"P0300 indicates: Random/Multiple Cylinder Misfire Detected. This is a ignition system code. 2 CHEVROLET IMPALA owners have reported this to NHTSA."

Q: "What are the most common causes of P0300 on CHEVROLET IMPALA?"

"Based on 2 NHTSA reports, the most commonly cited components are: Electronic Stability Control (Esc),Engine, Vehicle Speed Control,Electronic Stability Control (Esc),Traction Control System,Engine. These percentages are based on the component field in owner complaints."

Q: "Is P0300 serious on my CHEVROLET IMPALA?"

"Of 2 NHTSA reports for this code on CHEVROLET IMPALA, 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 IMPALA shows P0300?"

"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 P0300 Means on Your CHEVROLET IMPALA

P0300 is a diagnostic trouble code indicating: Random/Multiple Cylinder 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 IMPALA owners have reported this issue to NHTSA across model years 2008-2009. Most reports come from the 2008, 2009 model years. The most commonly reported component is Electronic Stability Control (Esc),Engine (50.0% of reports).

Real CHEVROLET IMPALA Owner Reports

Source: NHTSA Complaints Database

"2006-2009 chevrolet impala ss ticking noise, engine misfire and/or ses light. this may be the result of an afm (active fuel management for displacement-on-demand) lifter that unlocks as soon as the engine is started or one that is mechanically collapsed/stuck."

— 2008 CHEVROLET IMPALA owner · ELECTRONIC STABILITY CONTROL (ESC),ENGINE · Filed 01/07/2016

"Was driving when the traction control light came on and message came across saying service traction control: then check engine light started flashing rapidly at the same time. follow by a very loud knocking noise from the engine. then speed would not accelerate."

— 2009 CHEVROLET IMPALA owner · VEHICLE SPEED CONTROL,ELECTRONIC STABILITY CONTROL (ESC),TRACTION CONTROL SYSTEM,ENGINE · Filed 09/18/2014

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

📊 Complaint Trend by Model Year

1

'08

1

'09

Common Causes on CHEVROLET IMPALA

Based on NHTSA complaint component analysis for this vehicle.

ELECTRONIC STABILITY CONTROL (ESC),ENGINE 50%

VEHICLE SPEED CONTROL,ELECTRONIC STABILITY CONTROL (ESC),TRACTION CONTROL SYSTEM,ENGINE 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 P0300 mean on a CHEVROLET IMPALA? ▾

P0300 indicates: Random/Multiple Cylinder Misfire Detected. This is a ignition system code. 2 CHEVROLET IMPALA owners have reported this to NHTSA.

What are the most common causes of P0300 on CHEVROLET IMPALA? ▾

Based on 2 NHTSA reports, the most commonly cited components are: Electronic Stability Control (Esc),Engine, Vehicle Speed Control,Electronic Stability Control (Esc),Traction Control System,Engine. These percentages are based on the component field in owner complaints.

Is P0300 serious on my CHEVROLET IMPALA? ▾

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

What should I do if my CHEVROLET IMPALA shows P0300? ▾

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.