When I fixed the exhaust leak, part of my science experiment was to clear the codes. Yesterday the CEL light came back on, same P0153.

The computer says this was what was going on when the code came up:

RPM 1550
Load 38.4%
Temp 185
Intake manifold pressure 16.5 in. Hg
B1 STFT -1.62
B2 STFT .0
B1 LTFT 3.1
B2 LTFT 1.6

__________________
Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe