Having problems with your 2003 Cadillac Deville ?
O2 sensor wat does a 02 sensor do
O2\012sensor monitors the air fuel ratio consistently. It makes sure that the engine\012receives optimum fuel mixture all the time. If the mixture will be rich, i.e.\012more fuel and less air, it will signal the ECU to reduce the fuel supply and if\012the mixture will be lean, the fuel supply will be increased.
Repair Help & Product Troubleshooting for 2003 Cadillac Deville
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