BMW 1999-2005 M3 Service Manual page 1255

On-Board Diagnostics
BMW P-code
code
222 P0125
223 P1180
224 P1181
225 P1192
226 P0193
227 P0188
228 P0189
229 P0133
230 P0153
231 P1178
17 of 20
Fault type and Signal type and
function range
Insufficient coolant Input analog
temp. to permit (0-5V)
closed loop
operation
Oxygen sensor Input analog (high
post-cat (Bank 1), is lean) (0-5V)
switching time slow
Oxygen sensor Input analog (high
post-cat (Bank 2), is lean) (0-5V)
switching time slow
Post-cat sensor Input analog
(Bank 1); trim (0-5V)
control
Post-cat sensor Input analog
(Bank 2); trim (0-5V)
control
Fuel trim (Bank 1), DME internal
O2 control values logical
adaptation limit
Fuel trim (Bank 2), DME internal
O2 control values logical
adaptation limit
Oxygen sensor Input analog (high
pre-cat (Bank 1, is lean) (0-5V)
slow response time
Oxygen sensor Input analog (high
pre-cat (Bank 2), is lean) (0-5V)
slow response time
Oxygen sensor Input analog (high
pre-cat (Bank 1), is lean) (0-5V)
switch time too
slow
http://ebahn.bentleypublishers.com/BMW/3/E46/Repair%20Manuals/8...
Explanation
Comparison of actual coolant
temperature against
calculated DME value which
varies with load signal.
Checks amount of time
oxygen sensor takes to switch
from rich to lean and vice
versa. If too long, fault will
set.
Checks amount of time
oxygen sensor takes to switch
from rich to lean and vice
versa. If too long, fault will
set.
Rationality check for O2
control adaptation with post
catalyst sensor bank 1.
Rationality check for O2
control adaptation with post
catalyst sensor bank 2.
Range control of adaptation
values.
Range control of adaptation
values.
Checks amount of time
oxygen sensor takes to switch
from rich to lean and vice
versa. If too long, fault will
set.
Checks amount of time
oxygen sensor stays in its rich
or lean state. If it remains
there too long in either fault
will set.
Checks amount of time
oxygen sensor takes to switch
from rich to lean and vice
versa. If it takes too long to
2/25/2009 11:23 PM