View Full Version : 2002 Eclipse 3.0 o2 sensor location???

02-13-2009, 01:08 AM
PO134 PO152 PO154 PO155 PO171
2002 mitsubishi eclipse v6 3.0
I think this means I have two bad o2 sensors, bank 1 sensor 1 & bank 2 sensor 1. Are these the two sensors in the exhaust manifold front and back?
The manual only shows a 2.0L car with two sensors total.

02-13-2009, 04:15 PM
Hi eclipse-02,

Yes, the upstream (sensor 1) O2 sensors are located in the exhaust manifolds. The downstream sensors (sensor 2) are located on the other end of the catalytic converters.