P2147Fuel & Air Metering
Fuel Injector Group A Supply Voltage Circuit Low
P2147 means the supply voltage to fuel injector group A read too low, indicating a short to ground or high resistance on the power feed.
🚗 Not recommended. Low injector supply voltage can cause misfires and stalling.
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🎯 Top Causes, Ranked by Likelihood
#1Wiring shorted to ground or high resistance$50-$300
A short to ground or corroded feed drops the supply voltage.
#2Failed injector or connector$100-$500
A shorted injector loads the supply circuit low.
#3Blown fuse or weak relay$5-$100
A failing relay or fuse reduces supply voltage.
#4Faulty ECM injector driver$200-$1200
An internal driver fault misreads or loads the circuit.
🩺 Common Symptoms
- Engine misfire or rough running
- Hard starting
- Check engine light
- Loss of power
- Stalling
💰 Repair Cost: DIY vs Shop
📋 Free OBD2 Code Cheat Sheet
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🔧 How to Diagnose P2147
1Check the injector supply fuse and relay
2Inspect the wiring for shorts to ground or corrosion
3Test supply voltage at the injectors
4Repair the circuit or replace the failed injector
❓ Frequently Asked Questions
Can I drive with a P2147 code?
Avoid it. Low supply voltage can cause misfires and stalling.
How much does it cost to fix P2147?
Repairs range from cheap wiring fixes to $100-$800 at a shop with diagnosis.
What causes P2147?
Usually a short to ground, high resistance, or a shorted injector on the group A feed.
🔗 Related Codes
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