P2146Fuel & Air Metering
Fuel Injector Group A Supply Voltage Circuit / Open
P2146 means the ECM detected an open or loss of supply voltage to fuel injector group A, so those injectors may not receive power to operate.
🚗 Not recommended. A whole group of injectors may stop firing.
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🎯 Top Causes, Ranked by Likelihood
#1Wiring or connector fault on the injector power feed$50-$300
An open or corroded power supply wire cuts voltage to the group.
#2Blown fuse or failed relay$5-$100
A failed fuse or relay removes power to the injector group.
#3Failed injector or injector connector$100-$500
A shorted injector or bad connector can open the circuit.
#4Faulty ECM injector driver$200-$1200
An internal driver fault stops the group from firing.
🩺 Common Symptoms
- Engine misfire or rough running
- Hard starting or no start
- Check engine light
- Loss of power
- Stalling
💰 Repair Cost: DIY vs Shop
📋 Free OBD2 Code Cheat Sheet
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🔧 How to Diagnose P2146
1Check the injector power supply fuse and relay
2Inspect the injector wiring and connectors for opens
3Test for supply voltage at the affected injectors
4Repair wiring or replace the failed component
❓ Frequently Asked Questions
Can I drive with a P2146 code?
Avoid it. A group of injectors may not fire, causing misfires and possible stalling.
How much does it cost to fix P2146?
Simple fuse or wiring repairs are cheap, but diagnosis and repair can run $100-$800 at a shop.
What causes P2146?
Usually a wiring, fuse, or relay fault that cuts supply voltage to an injector group.
🔗 Related Codes
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