$3 O2 simulator fix for P0420 Check Engine Light
7:35
YouTubeMITEEman
$3 O2 simulator fix for P0420 Check Engine Light
Do you occasionally get code P0420 - catalytic converter low efficiency? This $3 electrical circuit may fix the problem permanently by electrically smoothing out the o2 sensor output. Don't spend $10 on fuel additives (tried it), or $100 on new o2 sensors (tried it), or $200-400 on a new non-OEM catalytic converter which may fail again (seen ...
1.5M viewsJan 2, 2014
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