There is more to codes & vehicle systems, than replacing parts
Any part that is replaced, has to fail a test, to need replacing & the
repair has to be verified & the systems wiring tested as well ,if the
component test of a part doesn't yield results
A Generic Code Reader alone, won't be enough to work on
any vehicle
SOURCE: 2003 Hyundai Elantra GLS. Check engine light, code PO133
Did you use a aftermarket O2 sensor or a genuine Hyundai one? If it's an aftermarket one it may be bad or not as good as the OEM one. See here for more details and other potential causes: P0133
SOURCE: 2003 kia rio Check engine light keeps comin on...
You would need to use a scanner to watch the data coming from the sensor. In some cases the heater circuit for the sensor is faulty, and in other cases the sensor is reading rich only. It is supposed to switch back and forth between rich and lean depending on the exhaust gas content.
The heater circuit makes the sensor hot enough to use within 2 minutes of starting the engine.
67 views
Usually answered in minutes!
×