Ok. Sounds like its worth a try. I'll pull off the manifold and check all the connectors again.
Thanks Jimmy57.

Thanks Jimmy57

However, don't think that is the problem with my knock sensors as I have installed the updated ones from Groton. There is no connector on the actual sensor with these ones. The wires (with protective plastic sleeve) come directly out of the sensor.

Any other ideas?

G'day Everyone, I have been pulling code: 1-4-3 from socket A2 on my volvo 850 T5 on and off for the last few years. When It first came up I replaced the knock sensors with the updated ones from groton. Code went away for a while but returned again a few months later. I cleared the code and it was o...