The P0066 trouble code is associated with the Air Assisted Injector Control Circuit or Circuit Low, indicating a potential issue with the control circuit or a low voltage condition of the air-assisted injector. This code is commonly found in vehicles equipped with air-assisted injection systems.
P0066 Air Assisted Injector Control Circuit or Circuit Low
Code symptoms P0066.
1. Illuminated “Check Engine” or “Service Engine Soon” light on the dashboard.
2. Decreased engine performance.
3. Unusual exhaust emissions.
This code is common in brands such as:: Chevrolet, Renault, Ford, Toyota, Nissan, Mercedes Benz, Honda.
Causes of the code P0066.
1. Faulty air-assisted injector control circuit.
2. Low voltage condition in the air-assisted injector circuit.
3. Issues with the Engine Control Module (ECM).
Code Solutions P0066.
1. Inspect and repair or replace the air-assisted injector control circuit if faulty.
2. Address and rectify any low voltage conditions in the air-assisted injector circuit.
3. If ECM issues are suspected, consult a qualified technician for diagnosis and potential reprogramming or replacement.