Pulling the battery cable or EFI fuse for a couple minutes should clear the codes.
Here's what the codes mean, if you didn't know already.
5 Open or shorted Oxygen Sensor (O2) circuit
- Lean or rich indication (with injectors full rich or full lean)
- Defective O2 sensor
- Defective ECU
6 No engine revolution sensor (Ne) signal to ECU
- Ne being over 1000 RPM in spite of no Ne signal to ECU
- Defective Igniter circuit
- Defective Igniter
- Defective distributor
- Defective ECU
