Hi everyone, In my prius 2008 in 190k I have changed 02 sensor both not genuine and again one genuine but lights keep coming.i am much obliged if any one experience the same can advice me.BELOW IS THE DIAGNOSTIC PICTURES TIA. Posted via the PriusChat mobile app.
Welcome to PriusChat!! Here is the workup for DTC P0031 : https://share.qclt.com/%E4%B8%B0%E7%94%B0%E6%99%AE%E7%91%9E%E6%96%AF%E5%8E%9F%E5%8E%82%E8%8B%B1%E6%96%87%E6%89%8B%E5%86%8Cpdf%E6%A0%BC%E5%BC%8F/repair%20manual/04pruisr/05/2054m/cip0031.pdf Here is the workup for DTC P0037 : https://share.qclt.com/%E4%B8%B0%E7%94%B0%E6%99%AE%E7%91%9E%E6%96%AF%E5%8E%9F%E5%8E%82%E8%8B%B1%E6%96%87%E6%89%8B%E5%86%8Cpdf%E6%A0%BC%E5%BC%8F/repair%20manual/04pruisr/05/2054m/cip0037.pdf Here is the workup for DTC P2239 and P2252 : https://share.qclt.com/%E4%B8%B0%E7%94%B0%E6%99%AE%E7%91%9E%E6%96%AF%E5%8E%9F%E5%8E%82%E8%8B%B1%E6%96%87%E6%89%8B%E5%86%8Cpdf%E6%A0%BC%E5%BC%8F/repair%20manual/04pruisr/05/2054m/cip2238.pdf You may need to upgrade you tools to include a 'mini-vci' cable and techstream, which requires a windows device that has a USB port.
Hi thanks for the info.apologies my technical knowledge is low.would u think if air flow sensor need checked and replaced.or fuses need checked and replaced.or 12v battery checked replaced.thanks Posted via the PriusChat mobile app.
The workups in the factory manual are designed to be followed step by step. I would start with step #1 in each workup (p0031 and p0037), and measure the resistance for both aftermarket sensors as that could be the problem. Which brand and part# did you replace them with, most would recommend using Denso or toyota OEM sensors only. If the vehicle starts, the 12v battery should be fine for the time being.
