Question

1999 Chevrolet Camero V6, more than one misfire, and the service engine light on with engine codes P0340 and P0147

Answer 1

Hi there

The code P0340 is for the bank 1 cam position sensor. This will cause multiple misfires or it's possible the timing is off and that is causing the code and the misfires. P0147 is a code for bank 1 sensor 3 of the O2 sensors. This is the sensor AFTER the catalytic converter. Typically replacing the sensor resolves the issue.

Answer 2

P0340 CHEVROLET - Camshaft Position Sensor 'A' Circuit Malfunction
Read more: https://www.autocodes.com/p0340_chevrolet.html

P0147 CHEVROLET - HO2S Heater Circuit Bank 1 Sensor 3
Read more: https://www.autocodes.com/p0147_chevrolet.html