Diagnostic Trouble Code 95 ZJ

[ika667]

Hey Guys,

My engine light is not on, however when I went to start my ZJ this morning it made a different noise and seemed to struggle for a second before it started. When I checked the code, it gave me this:

Code 12: Problem with the battery connection. Direct battery input to PCM disconnected within the last 50 ignition key cycles.

Code 17: Engine is cold too long. Engine coolant temperature remains below normal operating temperatures during operation. (Check thermostat)

Now I am far from being a mechanic, can anyone explain to me what's going on, and if its a big deal? I am leaving on a 10 000 KM road trip next week, is it going to be OK?

[JackstandJohnny]

thermostat is stuck open.
change it.  that should solve your problem of runnin to cold. 

good luck on your 10k journey.
go team ZJ!

[jpthing]

OBD1 is the computer system used on pre 96 vehicles. I have never really had good luck with obd1 providing much in the way of useful info.
if your vehicle achieves and maintains a normal temp on the gauge, your 'stat is probably ok.
how does it drive?
If it seems to lag at some times and surge at others, but starts and runs ok overall, I usually check the tps first.
My 95 xj (similar electronics) recently started acting funny as described above. check engine light came on. when I pulled the code, to confirm my tps suspicion, the code was for a fault in the ac system. I ignored the code, replaced the tps, and the light stopped coming on and it ran normally again.

good luck!!

[cLAY]

Code 12: Problem with the battery connection. Direct battery input to PCM disconnected within the last 50 ignition key cycles.

Seems pretty straight forward to me, clean your battery connections.

[dunl]

Seems pretty straight forward to me, clean your battery connections.

Even more straightforward than that....if it has been boosted or unhooked in the last 50 starts, this code shows.

[cLAY]

The code coupled with starting issues makes me think connections. You are correct though, anytime the battery is disconnected or run dead this code will show.