Troubleshoot Engine Codes

[Yoda]

Took it out and they tested it in the machine.

[CTScott]

Originally Posted by Yoda

Took it out and they tested it in the machine.

It's either bad, or the ground or power connection from it is heavily corroded. The big wire that is bolted under the grey plastic cover is the positive wire, which goes right to the back of the positive battery terminal. The ground is its case contacting the block. So, the ground straps from the block to the negative terminal are what you want to check on that side.