how to repair a Poo30 code

Question

How to repair P0030 Default code for 2003 Saturn LW300

Answer 1

The problem is more than likely the front O2 sensor. Before replacing the sensor make sure the O2 sensor fuse is OK. The sensor it's difficult to replaced and you can get it at any autoparts.

- Let the engine cool down.
- Disconnect car battery
- Remove old sensor with a 22mm wrench
- Install new one.
- Reconnect battery
- The code should be already cleared.

P0030 HO2S Heater Control Circuit Bank 1 Sensor 1