Pontiac Firebird P0421 Code: Meaning, Causes, How to Fix

P0421 is a relatively rare OBDII trouble code.   It’s generic, which means it has the same definition for the Pontiac Firebird as it would any other vehicle. It is technically defined as “Warm Up Catalyst Efficiency → Below Threshold (Bank 1)”. In layman’s terms, it indicates that your Pontiac Firebird’s catalytic converter is not scrubbing pollutants efficiently … Read more

Pontiac Firebird P0496 OBDII Code Diagnosis

One of the most common trouble codes with the Pontiac Firebird is the P0496 code. This code number references a number that is given to you when you plug your Firebird into an OBDII scanner. Below, you’ll find the most common symptoms and ways to diagnose the P0496 in your Pontiac Firebird. Good Luck!   … Read more

Pontiac Firebird P0500: VSS – Circuit Malfunction

  P0500 is a OBDII trouble code that affects the Pontiac Firebird‘s Vehicle Speed Sensor (VSS). The VSS sends a signal to the engine’s computer letting it know how fast that the vehicle is going. The Firebird uses this signal for many vehicle functions. It helps control transmission shifts, ABS, cruise control, the speedometer, and … Read more

Pontiac Firebird P0440: Meaning, Causes, How to Fix

The P0440 code is a common trouble code that many Pontiac Firebird owners may encounter. It indicates that there is an issue with the car’s Evaporative Emission Control (EVAP) system. Specifically, the EVAP system is malfunctioning. A variety of causes can trigger the P0440 code, with the most common one being a loose or damaged … Read more

Pontiac Firebird 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 Pontiac Firebird 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

Pontiac Firebird P0401: EGR – Insufficient Flow Diagnosis

P0401 is a common OBDII trouble code that’ll pop up in the Pontiac Firebird. It has to do with the emissions system and stands for: The EGR system on a vehicle is responsible for recirculating exhaust gasses in order to lower the vehicles emissions output. There are three main parts of the Firebird’s EGR system. … Read more

Pontiac Firebird P0171: Causes, Diagnosis, + How to Fix

One of the most common trouble codes with the Pontiac Firebird is P0171. It indicates that your Pontiac Firebird is running lean on the bank one side.  It’s the most common air/fuel mixture-related code. It’s not the most complicated OBDII trouble code to diagnose. It is also one of the most common codes. The most … Read more