P2148Fuel & Air Metering
Fuel Injector Group A Supply Voltage Circuit High
P2148 means the supply voltage to fuel injector group A read too high, indicating a short to voltage or a circuit fault on the power feed.
🚗 Not recommended. Abnormal injector supply voltage can cause driveability faults.
Is P2148 really the problem on YOUR car?Get a free AI diagnosis ranked by probability for your exact year, make, and model.
Run Free Diagnosis →
🎯 Top Causes, Ranked by Likelihood
#1Wiring shorted to voltage$50-$300
A short to power raises the injector supply voltage.
#2Failed injector or connector$100-$500
A faulty injector or connector disrupts the circuit.
#3Charging system overvoltage$150-$500
An overcharging alternator can push supply voltage high.
#4Faulty ECM injector driver$200-$1200
An internal driver fault misreads the circuit voltage.
🩺 Common Symptoms
- Engine misfire or rough running
- Check engine light
- Loss of power
- Hard starting
- Stalling
💰 Repair Cost: DIY vs Shop
📋 Free OBD2 Code Cheat Sheet
The 50 most common codes with likely cause and DIY fix cost. Sent once, no spam.
🔧 How to Diagnose P2148
1Check charging system voltage
2Inspect the injector wiring for shorts to power
3Test supply voltage at the injectors
4Repair the circuit or replace the failed component
❓ Frequently Asked Questions
Can I drive with a P2148 code?
Avoid it. Abnormal supply voltage can cause misfires and stalling.
How much does it cost to fix P2148?
Repairs range from cheap wiring fixes to $100-$800 at a shop.
What causes P2148?
Usually a short to voltage or an overcharging alternator on the group A feed.
🔗 Related Codes
Don't guess. Know exactly what's wrong.AmpAuto's AI ranks the real causes for your specific vehicle in 30 seconds.
Diagnose P2148 Free →