“P0507 - Idle Air Control System RPM Higher Than Expected” Issue on My 2012 Ram

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Ramowner2016

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Jul 27, 2026
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Location
CA
Ram Year
2016
Engine
5.7L Hemi V8
I have two Rams and my 2012 is throwing a P0507 code. I’ve tried a lot of things and purchased a new throttle body with the new sensor (it comes as one unit) and the pedal or Accelerator Position sensor. I have cleared the codes and initiated a relearn to the PCM for both sensors. I have checked the connectors and pins for any visible damage, but everything looks fine. I tested the voltage on my battery and it is reading at above 12.47v when off and over 13.8 while engine is running. I have checked all hoses connect to the PCV for cracks and I used my smoke machine to test different hoses, one of which led me to believe I had found the culprit but it turned out to be a small home under the throttle body on the manifold which comes from the manufacturer. That was a bust. Nothing!! Everything's looks fine. I have removed and cleaned the MAF sensor and cleaned it just in case it was dirty but still the same. I removed the manifold completely and reinstalled it. Nothing!! I rescanned for any new codes and I did get P0174 code - System Too Lean Bank 2 1, and a P0171 for Bank 1. Like WTF!!! How are these just coming up now!? Has anyone ran into the same issue? Share what you did. I would really appreciate any feedback. Thank you!
 

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04fxdwgi

Senior Member
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May 19, 2023
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Location
Coastal NE North Carolina
Ram Year
2016 1500 Sport
Engine
5.7 Hemi
Ummmm, what IS your idle speed? Mine idles at 700 RPM (set that in the tune) and there are no problems.

Those lean conditions indicate a vacuum leak is very suspect.

New gaskets on manifold when re-installing? What torque on the bolts? Any sealant or lubricant?
All hoses checked for vacuum leaks?
Check brake booster for leak?

When you replaced the parts, did you use OEM or some Amazon knockoff?
 
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