1148 code is for the bank 1 (drivers side) closed loop control. 1276 is the AF sensor on bank 1. Both of these codes are caused by a bad AF sensor (or its wiring). The sensor is located in the drivers side exhaust manifold. (not the O2 sensor that is located in the B pipe.)
Thank you for such a fast reply. I just replaced the o2 sensor on the drivers side, on the header. Where is the AF sensor on bank one? I was under the assumption the AF sensor is the same as the o2 and both codes would go away if I changed the o2 sensor.
Metal Smith from hell in the US Navy
Again, the O2 sensor IS NOT the AF sensor. The AF sensors are located in the manifolds or header, OEM or not. The O2 sensor is located in the B pipes. They are not the same, and have different functions.
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