OBD-II Generic Error Code P0066: How to Fix It

Q: What does error code P0066 mean?

P0066 means the ECM detected a low voltage or malfunction in the air assisted injector control circuit.

Q: Can I drive with a P0066 code?

It is not recommended. The engine may run poorly, have reduced power, or stall. Have it diagnosed promptly.

Q: How much does it cost to fix code P0066?

Costs vary: DIY repair can be under $50 for a solenoid or hose, while shop repair may range $100-$300 or more.

Q: Is P0066 the same for all car brands?

Yes, P0066 is a generic OBD-II code, so the meaning is the same across all makes and models.

Q: What tools do I need to diagnose P0066?

You will need an OBD2 scanner and a multimeter. Optionally, a vacuum gauge.

Abstract

Error code P0066 indicates that the engine control module (ECM) has detected a low voltage or malfunction in the air assisted injector control circuit. This system uses air pressure to improve fuel atomization. A faulty injector, wiring issue, or air pressure problem can trigger this code.