2000 Ford Windstar Q&A

2000 Ford Windstar Question: My 2000 Ford Windstar failed the emissions test with (3) codes.

P0135-02 Heater sensor heater circuit malfunction bank 1 sensor 1, P01131-Manufacturer specific code, P0171-System too lean bank 1. -
Answer 1
THE PO 171 IS POSSIBLE VAC LEAK IN BANK 1, HEATER CIRUIT POSSIBLY BAD IN SENSOR OR CIRCUIT -