Can I bypass the cts (coolant temp sensor) sensor and install a mechanical one?

Question

Can I bypass the electrical CTS and install a mechanical one? ie. gas filled probe.

Answer 1

One of the jobs of the ECM is to look for open circuit short circuit and rationality, So no you can't. You would set the CK ENG LT do to a rationality condition., The ECM will monitor the cool down of the cooling system when the engine is shut down.