deltadog74
04-02-2009, 07:42 PM
i have a 99 tahoe and the ses light keeps coming on reading po340. i replaced the sensor and still, same code, same problem missfiring. how to i fix this problem? i checked the wires, nothing wrong, i reset the code with a scan tool(a cheap autozone tool but it serves most of my small diy needs) but the light still comes on. any advice? thanks