P2146 — Fuel Injector Group A Supply Voltage Circuit/Open

What Does P2146 Mean?

P2146 is a diagnostic trouble code indicating: Fuel Injector Group A Supply Voltage Circuit/Open. This code relates to the powertrain system. It has been reported in NHTSA complaints across 3 different vehicle models.

Symptoms of P2146

⚠️ Check engine light illuminated

Common Causes

🔍 Clogged or leaking fuel injector
🔍 Wiring or connector problem

P2146 Reports by Year

2007

1

2010

1

2015

1

Real Owner Reports

From NHTSA complaint database — actual owner descriptions.

"DURING A ROUTINE MORNING COMMUTE, I NOTICED THE CHECK ENGINE LIGHT HAD ILLUMINATED. IMMEDIATELY FOLLOWING THE MALFUNCTION, I NOTICED A SEVERE DECREASE IN ENGINE POWER AND THE ENGINE STARTED TO VIBRATE AND MIS-FIRE HEAVILY. I WAS IN HEAVY TRAFFIC AND HAD TO PULL OFF OF THE ROAD TO AVOID A POTENTIAL "
— Chevrolet Silverado owner, 02/14/2007

"BRAND NEW VOLKSWAGEN JETTA SPORTWAGEN TDI HAS STALLED AT SPEEDS FROM 25-65 MPH WITH ABSOLUTELY NO WARNING (NO WARNING LIGHTS OR MESSAGES AND NO CHANGE IN DRIVING PERFORMANCE). THIS HAS OCCURRED 3 TIMES AT APPROXIMATELY 4K MILES. THE 3RD TIME THE CAR HAD TO BE TOWED FROM A MAJOR EXPRESSWAY SINCE TH"
— Volkswagen Jetta owner, 06/26/2010

"DRIVING 75MPH IN HEAVY HIGHWAY TRAFFIC THE CHECK ENGINE LIGHT CAME ON AND THE TRUCK LOST POWER AND SLOWED TO 40 MPH IN ABOUT 200 YARDS. WE ALMOST GOT HIT BY ALL THE TRAFFIC BEHIND AND AROUND US AS THIS HAPPEN WITHOUT ANY WARNING. WE GOT TO THE SIDE OF THE HWY AND I HAVE A SCANNER AND FOUND 2 CODES P"
— Gmc Sierra owner, 11/06/2015

Source: NHTSA Complaints Database

Most Reported Vehicles for P2146

Based on NHTSA owner complaint data.

#	Vehicle	Reports
1	CHEVROLET SILVERADO
2	VOLKSWAGEN JETTA
3	GMC SIERRA

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
🔧 Inspect wiring harness and connectors for damage, corrosion, or loose connections
🔧 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.

P2146: Fuel Injector Group A Supply Voltage Circuit/Open