Mercury Montego P0151 Code: Meaning, Causes, How to Fix

The P0151 code is an OBD-II diagnostic trouble code that indicates low voltage in the Mercury Montego’s Oxygen (O2) sensor circuit located at Bank 2, Sensor 1 (B2S1). The B2S1 O2 sensor plays a crucial role in maintaining optimal engine performance by detecting the air-fuel ratio in the exhaust, then sending this data to the … Read more

Mercury Montego P0403:EGR→ Circuit Malfunction

P0403 is a very common trouble code. It is a generic code, which means that it has the same meaning for the Mercury Montego as it would any other vehicle. It affects the EGR (Exhaust Gas Recirculation System and technically means: P0403: EGR→ Circuit Malfunction A circuit malfunction implies that there is a wiring problem … Read more

Mercury Montego P0404: EGR Circuit → Range/Performance

With the Mercury Montego, P0404 is going to have the same meaning as it would in any other vehicle. It’s a generic powertrain code that stands for: P0404: EGR Circuit → Range/Performance While there are several issues that can throw the P0404 code in the Montego, the most common issue is either going to be … Read more