C240 OBD codes 136 & 156

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C240 OBD codes 136 & 156

03-01-2010, 01:41 PM

mslc791

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Join Date: Jul 2004

Posts: 121

C240 OBD codes 136 & 156

I got CEL on my 2001 C240, the car has 124k on the clock. It read 2 codes P0136 and P0156. The CEL went off in the meantime. Should I replace both rear (after cat) O2 sensors? I have emission sticker expiring in 3 months, so was wondering if the codes will clear too, since the CEL did.

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