The O2 sensor is actually made up of two oxygen sensors. They are the same in shape and design. The only difference between the upstream sensor and the downstream sensor is the location. The upstream sensor screws directly into the exhaust manifold, and the downstream sensor screws into the catalytic converter housing.
This sensor sends a signal to the PCM (Powertrain Control Module). The signal will inform the PCM about how rich or lean the fuel is. This is important information because the PCM needs to know whether to add fuel or pull fuel from the engine. The goal of the PCM is to always have the engine running in the stoichiometric range, which is 14.7 to 1 air to fuel ratio.
Since the O2 sensor gets very hot, it has its own heater inside. The P1150 trouble code is set if the heater in the upstream sensor is not operating.
* Cause
* Faulty Heated Oxygen Sensor
* Poor electrical connections
* Damaged wires or connectors
* Faulty PCM
* Faulty fuel injector
* Faulty ignition coil
* Retarded timing
* Exhaust leaks
* Solution
1. Check the wiring and connections to the O2 sensor. Make sure they are clean and tight.
2. Check the O2 sensor for damage. If it is damaged, replace it.
3. If the O2 sensor is not damaged, clear the code and see if it comes back.
4. If the code comes back, you may need to replace the PCM or the fuel injector or ignition coil.
5. If you have retarded timing or exhaust leaks, you will need to fix them before you can clear the code.
