Hello All-

I purchased a XG350 new in 2002, which until recently has been rock-solid reliable.

First, I replaced the original battery in December. In February, acid leaked out the top of the battery, making quite a mess. A faulty voltage regulator was supposedly to blame, so we replaced the battery and installed an after-market alternator.

Now, 2 months later, a yellow check engine light. We pulled the codes, which read P1191 P1193 P0705. I'm guessing P0705 indicates a "Trans Range Sensor Circuit Malfunction", with the sensor being located under the battery.

I'm getting conflicting information about P1191 and P1193 -- any ideas?

Also, could the after-market alternator cause damage the these electrical components?

Trying to gather information before going to the dealer ($$), any guidance would be much appreciated...

All-

We resolved the check engine light issue by searching hmaservice.com for TSB's related to the specific DTC codes.

P0705 indicated a "Transmisson Range Sensor Circuit Malfunction". This sensor is a small pivoting device located beneath the battery. The malfunction was corrected by following the recommended TSB guidance -- mainly, re-aligning the sensor position relative to the gear shifter cable. This allowed the sensor to correctly detect the shifter position (P,R,N,D). Habitual use of the Tiptronic feature may have contributed to the sensor mis-alignment (Tiptronic is quite addictive).

P1191/P1193 was a paired code indicating the Electronic Throttle Sensor (ETS) had detected engine RPM's of less than 470, resulting in a potential "limp home" mode. TSB #06-36-003 identified several differing possible causes, ranging from a faulty ETS -to- loose connectors -to- carbon buildup around the throttle body. We disassembled the air intake, de-gunked the general area around the ETS, applied dialectic grease to the connectors, and re-seated everything nicely.

Thanks to hyundai-forums for cluing us in to the hmaservice website. Otherwise, it would have been a big fat repair bill from the local dealer...