P0266 — Cylinder 2 Contribution/Balance

What Does P0266 Mean?

P0266 is a diagnostic trouble code indicating: Cylinder 2 Contribution/Balance. This code relates to the fuel injection system. It has been reported in NHTSA complaints across 1 different vehicle models.

Symptoms of P0266

⚠️ Loss of engine power

Real Owner Reports

From NHTSA complaint database — actual owner descriptions.

"What component or system failed or malfunctioned, and is it available for inspection upon request? It appears to be a piston failure, as there is compression and diesel in the crankcase. Engine is still in the vehicle but once removed it will be available for inspection if needed. How was your safe"
— Chevrolet Colorado owner, 06/01/2024

Source: NHTSA Complaints Database

Most Reported Vehicles for P0266

Based on NHTSA owner complaint data.

#	Vehicle	Reports
1	CHEVROLET COLORADO

Frequently Asked Questions

Can I drive with this code?

It depends on the severity. If the vehicle runs normally, short trips are usually OK. If you notice performance issues, drivability problems, or warning lights beyond the check engine light, get it checked soon.

Will this code clear itself?

Some codes clear automatically after the underlying issue is fixed and several drive cycles pass. But the root cause must be addressed first.

How do I find the exact cause?

A code alone doesn't pinpoint the failed part. You need a diagnostic scan ($50-150 at most shops) that reads freeze frame data and live sensor readings to identify the specific component.

What To Do Next

Possible Fixes

🔧 Have the code scanned with a professional-grade scanner to read freeze frame data
🔧 If DIY repair isn't feasible, get a diagnostic from a trusted mechanic ($50-150)

1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

P0266: Cylinder 2 Contribution/Balance