Throttle Position Sensor & Alternator - Jeep Adventures

[Nick1994]

Well, I took my Jeep out and splashed through some mud puddles and when I left the battery light came on. After a little bit the CEL came on and it would off and on run like crap on the freeway home. Got home and the battery was 12.1V, whether running or not. Battery is only 2 months old. CEL is a P0121 TPS code.

So is it a coincidence that both of these issues show up from splashing in the muddy water and I'll need an alternator and a throttle position sensor or should I wait and just fix the alternator and see if the TPS is fine once the voltage is back up and normal?

It needs a starter too as it has been cranking slow anyways, thinking of taking the starter and alternator to a local rebuild shop.

 

[Chris142]

I quit washing my Jeep engine because every time I do I have to replace the tps.

 

[SwampSurvivor]

It's entirely possible you took out both. XJs have the alternator in an incredibly stupid location and if you're missing the rubber splash shield, it's very easy to kill it with a puddle

 

[Kruse]

I've got two '96 Jeep Cherokees. I've seriously thought about putting external voltage regulators on them, but I haven't....yet.
All kinds of videos on Youtube how to do it, I just don't want to get away from the stock setup.

 

[CT8]

Something wet?

 

[Piston_slap]

Alternators do have brush assemblies in them. Run some gritty mud water over them and I could see the brush and commutator damaged badly.