P2645 — A Rocker Arm Actuator Control Circuit/Open Bank 1

What Does P2645 Mean?

P2645 is a diagnostic trouble code indicating: A Rocker Arm Actuator Control Circuit/Open Bank 1. This code relates to the powertrain system. It has been reported in NHTSA complaints across 2 different vehicle models.

Symptoms of P2645

⚠️ Check engine light illuminated

P2645 Reports by Year

2014

1

2020

1

Real Owner Reports

From NHTSA complaint database — actual owner descriptions.

"VEHICLE STALLS. AFTER PUTTING VEHICLE IN REVERSE AND BACKING OUT OF PARKING SPOT, VEHICLE STALLED. AFTER RESTARTING AND PULLING BACK INTO PARKING SPOT VEHICLE STALLED. I SHUT CAR OFF AND RESTARTED IN PARK AND AFTER 5 SECONDS VEHICLE STALLED AGAIN. CAR HAD TO BE TOWED AND RENTAL CAR WAS NECESSARY TO "
— Toyota Corolla owner, 09/24/2014

"TOOK MY VEHICLE IN FOR ITS REGULAR OIL CHANGE. A FEW DAYS LATER, THE CAR STARTED DRIVING FUNNY. I NOTICE THAT WHEN I WENT TO ACCELERATE THAT THE VEHICLE STARTED SHAKING. AFTER IT HAPPENED A FEW MORE TIMES WITHIN THAT SAME WEEK, MY CHECK ENGINE LIGHT CAME ON. I DECIDED TO TAKE IT BACK TO THE CHEVY DE"
— Chevrolet Impala owner, 03/23/2020

Source: NHTSA Complaints Database

Most Reported Vehicles for P2645

Based on NHTSA owner complaint data.

#	Vehicle	Reports
1	TOYOTA COROLLA
2	CHEVROLET IMPALA

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.

P2645: A Rocker Arm Actuator Control Circuit/Open Bank 1