Just prior to this code 51, I had gotten code indicating my O2 Sensor was bad, so I have just replaced both upstream/downstream sensors with Bosch from Autozone. After just a day or two, the check engine light came on again with the running lean code. So, now, I'm wondering if the O2 sensors being non-OEM, I'm getting bad O2 readings. Repair shop had told me when they replaced MAP sensor that O2 sensors were reading OK. Just seems like all this started when I put in the new O2 sensors. I'm thinking of just unplugging them, I think the engine performance would be better than it is right now.
Any suggestions of other things to check? Things like fuel injectors, or Mass Airflow sensors would have seemingly come up before the bad O2 sensors.
Any help is surely appreciated.
have the same problem?
Sunday, June 3rd, 2007 AT 6:25 PM