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Originally Posted by NCFarmerBoy
Anyone know what the OBD2 code of p0133 means. I know the books say "O2 SENSOR CIRCUIT SLOW RESPONSE(BANK1 SENSOR1)". But what does that mean.
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Basically, just what it says. The upstream O2 sensor (driver side) is not reacting fast enough to the changes as the PCM is varying from a rich/lean condition. Here is a link which may explain it a little better.
http://www.obd-codes.com/trouble_cod...1-sensor-1.php
Most likely cause would be the O2 sensor. However, put a scanner, scope or DMM on it and verify that the voltage levels at the sensor are slowly changing.
10-27-2005, 07:11 PM
Meaning of P0133
