P CODES (POWERTRAIN) P0400 - P0499

Catalyst System Efficiency Below Threshold Bank 2. How Would You Start To Pin-point This?

Vehicle Is Throwing P0420, Catalytic Converter Was Replaced Last Year (but Son Drove It Around Campus For Months With Code Returned). Live...

Is It Possible That The Air Pump Not Put Out Enough Air? I Replaced It And Also Replace The Back Check Valve. The Service Engine Light...

I Have A P0411 Code And I Was Wondering Where The Secondary Air Injection Pump Is Located. Secondary Air Injection. Upstream Detected. I...

The Engine Light Came On. I Used A Code Key Reader And Found P0446 And P0446(pd) Error Codes. I Checked The Hose Coming Out Of The Back Of...

P0430 Says Catalyst System Efficency Below Threshold Bank 2.

2001 Pontiac Grand Am 3.4l V6 P0420 Catalytic Efficiency Bank 1 Code Was Tripping Every 15 Miles. After Replacing The Thermostat Which...

Hello, I Have A 2000 Camry With 4 Cyl Engine And Ca Emissions. The Car Overheated Due To Broken Water Pump, And I Replaced The Cylinder...

I Recently Had My Car In To Replace A Motor Mount And When I Got The Car Back The Test Engine Light Was On. Is There Any Way That By Jacking...

Engine Runs Rough And Smooths Out As The Engine Warms Up.