If a 2001-2005 Hyundai XG or Santa Fe (3.0 or 3.5L) sets a DTC P1151, check the following:

-          Using the Hi-Scan Pro (under the current data menu), check the APS2 (accelerator position sensor #2) voltage. The Hi-Scan Pro describes this sensor as “ACCEL.P.SNSR (EMS)”.

-          With no throttle input (ignition key in the ON position and the engine not running). The APS2 voltage should be above 0.2V (typically between 0.3V and 0.9V).

-          With wide-open-throttle (ignition key in the ON position and the engine not running), the APS2 voltage should be above 4,5V (typically between 4.5 and 5.0V).

If the APS2 voltage does not meet the above criteria:

1. Check the wiring and connectors related to the APS2 sensor.
2. If the wiring and connectors check OK, then temporarily install, for diagnostic purposes, an APS sensor P/N 35357-3B011 from a vehicle that has not set DTC P1151.
3. If, after a short test drive, the code returns, replace the PCM.
4. If the code does not return, replace the APS sensor with a new part.

Hi Scan current data description explanation:

ACCEL.P.SNSR (EMS) = APS2, which is the main APS sensor signal. This signal goes to the PCM.

ACCEL.P.SNSR (ETS) = APS1, which is the redundant APS sensor signal. This signal goes to the ETS control module/PCM.

XG PRODUCTION DATE                          PCM P/N

07-01-00 to 09-01-01……………………..39110-39077

09-01-01 to 07-24-02……………………..39110-39680

07-24-02 to 10-09-02……………………..39110-39681

10-09-02 to 02-01-03……………………..39110-39961

01-01-03 to current………………………..39106-39350

SANTA FE PRODUCTION DATE                               PCM P/N

01-15-03 to 06-25-03 2WD……………………………39106-39610

06-25-03 to current 2WD………………………………39106-39612

01-15-03 to 06-25-03 4WD……………………………39106-39910

06-25-03 to current 4WD………………………………39106-39911