Posts Tagged: catalytic converter problems
What Causes a P0420 Code? Complete Diagnostic Guide
Most Common P0420 Code Causes Quick Summary If your check engine light comes on and your scan tool displays a P0420 code, don’t automatically assume you need a new catalytic converter. Always start by checking the items listed below. For example, first check and eliminate: • Exhaust leaks • Engine misfires • Excessive oil consumption • Internal coolant leaks • Fuel trim problems • Damaged oxygen sensors These can all trigger a P0420 catalyst system efficiency below threshold code. The key to fixing a P0420 code is identifying the root … Read More
Catalytic converter problems and symptoms
Learn the most common catalytic converter problems and symptoms If your vehicle displays any of the following trouble codes: P0420, P0421, P0422, P0423, P0424, P0430, P0431, P0432, P0433, P0434, you’re looking at the most common catalytic converter problems and symptoms. Unfortunately, too many people try fixing catalytic converter problems by replacing it without performing any further diagnostics. Bad move. Here’s why: catalytic converter problems are NEVER the cause—they’re the effect. There’s a saying that converters never die; they’re murdered, and it’s absolutely true. Every day I see people going to … Read More