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Paul M ASE Master
Paul M ASE Master, ASE Master Tech
Category: Car
Satisfied Customers: 4684
Experience:  Ase Master 20+ Years Experience Foreign and Domestic
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Hyundai: Car goes to limp home mode when cel set.

Customer Question

Hyundai 2004 XG350
CEL came on several times. Disconted battery to reset. Car goes to limp home mode when CEL set. CEL again and went to AutoZone to read trouble code P2127 the TPS. After testing voltage purchased Hyundia factory TPS. Replaced and ran fine for 2 mounths. Same code set. Start engine next day CEL still on, but car runs fine. Checked for poor or dirty connections as best I can. Problem always happens after hard acceleration. Any ideas will be appreciated.
Is it possible that the Accelerator Position Sensor is suspect?
Submitted: 7 years ago.
Category: Car
Expert:  Paul M ASE Master replied 7 years ago.
Hello and thank you for using Just Answer

the code p2127

is a accelerator position low input code.

yes I would change the accelerator position sensor it is located on the passenger strut tower


Paul M.
Paul M ASE Master and 7 other Car Specialists are ready to help you
Customer: replied 7 years ago.

Thanks for the response.

I looked at the APS, it appears the mounting has adjustment slots. I have the factory manual, but it does not discuss any installation and adjustment. What is the adjustment? Should I try adjusting before I replace the sensor?

Expert:  Paul M ASE Master replied 7 years ago.
The sensor should not have gone out of adjustment I would put the new sensor in the same adjustment location. I will check for any more info this evening when I get back to my desk around 9 pm

Expert:  Paul M ASE Master replied 7 years ago.
there is no further information available on the adjustment

the low input code is caused by an electrical problem inside the sensor

just put the new sensor in the exact spot the old one was in.


Paul M.