Hugh Jory 8/26/2010
2003 Saturn Ion-3 Base 4 Cyl 2.2L
Chech engine light came on. It said Code PO133. Replace 02 senor.
Is this difficult and what appro cost of senor
The sensor is threaded into the exhaust manifold. Remove the heat shield covering the manifold, a few bolts hold it on and then replace the sensor under it. You will need an O2 sensor socket / tool. You will need this sensor >> http://www.autopartswarehouse.com/.../BS13455.html Drive-train