Vision Function re-flash, P0139 MIL
I live in Texas and my inspection is up this month. So, this is urgent.
I just got my ECU back from vision function. I drove it for less than 10 minutes and the check engine light came on. Very disappointing. P0139 is the code.
P0139 O2 Sensor Circuit Slow Response (Post Catalyst)
I cleaned the MAF just because I could and it's an O2 sensor. No effect. It came on again.
If I climb under the car and clean the O2 sensor on the exhaust will that have any effect? With limited diagnostic tools what are my options? I would happily buy the correct diagnostic tool if it was reasonably priced. I don't like taking my Lotus to a shop.
Cedar Park, TX. 2005 Red Elise 111R. K&N CAI, Lotus Stage II exhaust, V2arms, RTD2brace, LETSLA, Vision Function NA ECU, 5 point belt, Single Nitrons