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Discussion Starter · #1 ·
So my Wife's 04 Santa Fe 3.5 went into limp mode on the way home.
I pulled codes P2127, followed by P1193 and then P2127 a second time.
So P2127 is Accelerator Position Sensor APS and / or TPS.
P1193 is limp mode from I understand.
By the time I checked the codes and cleared them the car ran 100% perfect. I went for a drive and no check engine light.
Question 1: Should I replace the APS or wait for it to play up again?
Question 2: Replacement of the APS is it a bolt and go or does it require adjustment of some sort.
Question 3: If I were to replace the TPS, I see that the bolt holes are slotted so there must be an adjustment. Am I right?
 

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Discussion Starter · #2 ·
Car continued to run fine after resetting the pcm. I went ahead and replaced the APS anyway just for my peace of mind.
 

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Discussion Starter · #4 ·
A high impedance multimeter is required to troubleshoot sensors like the TPS and APS. Problem is that I have no idea if my Craftsman multimeter is high impedance or not. A Fluke multimeter that is high impedance for sure and is specified for automotive use is north of $300.
So what other sensors are common to malfunction? Might as well do some homework.
 
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