P2146

Fuel Injector Group A Supply Voltage Circuit/Open

Fuel injector circuit Generic OBD-II High

What it means

P2146 means the ECM has detected an open (loss of power) in the supply-voltage circuit that feeds fuel injector group "A". Without that supply the injectors in the group cannot fire, so the affected cylinders stop delivering fuel. Depending on which cylinders are involved, the engine can misfire badly, stall, or refuse to start.

High

Can I keep driving? May not be drivable — if a whole injector group loses power those cylinders stop firing, so the engine can run very rough, stall, or fail to start.

Real-world scan data

Seen in

1,348

scans in the past year

Found in

0.2%

of scans

0.4%

of scans that found faults

Appears alongside · share of P2146 scans

P0683in 58.9% of scans

P0110in 58.6% of scans

P0100in 40.5% of scans

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

Common symptoms

What you'll notice

Check-engine light on
Severe misfire or rough running on the affected cylinder group
Hard starting, no-start, or stalling
Reduced power and hesitation

Common causes

Most likely first

Open in the injector group supply-voltage circuit — broken wire, corroded pin, or unplugged connectorLikely
Blown fuse or faulty relay feeding the injector group's supply voltageCommon
Poor electrical connection or ground at the injector control moduleCommon
Faulty fuel injector control module / driverLess often

How to diagnose & fix

Work through it in order

Do a visual inspection of the injector harness and connectors for breaks, corrosion, or unseated pins.
Check the fuse and relay that supply the injector group, and confirm battery voltage at the group's supply feed.
Verify the injector control module ground circuits against battery ground.
Test the control module supply-voltage circuit and, if the feed is present but the module does not switch, suspect the module.
Repair the open circuit or replace the failed component, then clear and re-test.

FAQ

Quick answers

Is it safe to drive with P2146?+

No. Losing power to an injector group can cause heavy misfiring and stalling, and unburned fuel can damage the catalytic converter. Fix it before driving.

Can I just clear P2146?+

Clearing it will not restore power to the injectors — the code returns immediately while the supply circuit is open. Repair the wiring or component first.

Read & clear P2146 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

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✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX