96 SL500 119 eng starts great cold, runs good, smooth,good on highway.
When it gets up to operating temp it will not idle.it stalls and will not restart unless you work the throttle to keep it out of idle.
IT is throwing codes for the O2 sensors after the cats both sides
P0141 and P0161 O2 probe heating after cat
replaced one of the sensors for trouble shooting no help still throwing the same codes. BIG difference in voltages between left and right probes
O2S G3/5 after cat left 18-23 mv
O2S G3/6 after cat right 380-399 mv big diference
Could this be a bad cat the O2 sensors can not adjust the mixture for ?are they clogged? do they act up when they are hot? Thanx John

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88 W124 3.0
96 R129 119eng
06 ML350
98 ML320 sold
02 CLK55 amg