Our certified mobile Oldsmobile mechanics in Avondale Estates will repair your car at your home or office

Hi Cornelius. Thanks for contacting us today. The P-0420 typically has to do with the catalytic converter in your vehicle, but can be triggered by damaged by O2 sensors, exhaust manifold or exhaust pipe leaks, or wiring harnesses that relay...

Your vehicle has three ignition coils. Diagnostic Trouble Code P0300 (https://www.yourmechanic.com/article/p0300-obd-ii-trouble-code-random-multiple-cylinder-misfire-detected-by-jamahl-walker) relates to random cylinder misfiring (not good for the catalytic converter, by the way) which has many, many potential causes but the first thing you should consider is when...

It depends on what you are doing. If you only need to replace the upper then replace just the upper. If you need to do the lower then you will need to drain the coolant. On these engines, they leak...