What does the P0420 OBD2 error code mean?
P0420 Error Symptoms. This P0420 obd2 code indicates that there is a problem with the catalytic converter, oxygen sensors or both. When this code is stored by the ECU, the malfunction indicator lamp will come on. This is your first sign that there is a problem somewhere in the emission system.
What are the P0420 and p0430 codes on a 2007 Jeep Wrangler?
Both P0420 and P0430 codes came at same time on a 2007 Jeep Wrangler, 150 K miles and an after market performance cat back system. Does fact that both codes (left bank and right bank) came on give any hint since each side has differect cats. Are there any other symptoms to look for in a catalytic converter?
Is P0420 code a continuous issue with Nissan Altima’s?
It doesn’t seem to be a continuous issue. Thoughts? Any indication on the most common occurence for this code with Nissan altima’s? i have ~ 145,000 miles I have a 1999 ford e150 base van 5.4 motor and I want to know we\\’re should I start first with parts. I had the battery replaced and the engine light with the P0420 code never came back on.
What causes catalytic converter efficiency below threshold (P0420)?
I took it to Autozone and they told me I have the catalyst efficiency below threshold (p0420) trouble code and it is probably an O2 sensor. On the advice of a mechanic friend I put a can of Seafoam in it with a tank of super unleaded and a can of STP octane boost.
What to do if your car has a p04020 code?
Based on the results of the diagnostics, here are the repairs that may need to fix code P04020: Address and fix any other codes paired along with the P0420 first as they may be generating false readings. Check and fix the muffler and exhaust pipes. Repair/change the exhaust manifold.
Can a bad catalytic converter cause a po420 code?
Yes, it can, but not in the way you think. Rich or lean mixtures can damage the catalytic converter, and when the catalytic converter is damaged/filled with fuel, the efficiency will be low, and the rear O2 sensor will see that and trigger the code Po420.
What causes the O2 sensor to show po420?
Rich or lean mixtures can damage the catalytic converter, and when the catalytic converter is damaged/filled with fuel, the efficiency will be low, and the rear O2 sensor will see that and show the trigger the code Po420.