2012 impala, stabilitrak and traction control issues

I have a 2012 impala with about 115000
miles. I am having problems with the service
stabilitrak, reduces engine power and
traction control off problems. I wash the
engine bay like I have done many times
before with low pressure water. Now It is
throwing the codes P2138 and C0242. I have
pulled all the wiring harness plugs that I can
think of and cleaned them with electrical
cleaner (not sure if I got them all). Swapped
the gas pedal out with another (no change).
Checked both wires running from the harness
to the wheel hubs ( all good).  If I do unplug
the battery it will sometimes shut the check
engine light and traction control light off for a
bit but they come back on.  Not to sure what
else I can do with putting money in it for
parts