After cleaning the throttle body with carburetor cleaner, the car runs badly and has codes P0106, P0171, P0174 and P0507?

DUSTYANDSHA KIRKLAND

MEMBER
2011 CHEVROLET CAPRICE
4.8L
V8
4WD
AUTOMATIC
212,000 MILES

Cleaned the throttle body using carb cleaner. I was careful not to touch sensor or motor inside. Did the relearn process but now my truck drives horribly and has pending codes of P0106, P0171, P0174, and P0507. Mil light is not on.

Tuesday, August 19th, 2025 AT 9:22 AM

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
54,137 POSTS

These are codes that are showing you have a massive vacuum leak. I would recheck your work to make sure the throttle body is securely attached to the intake manifold and the gasket is in good shape.

P0106 - MAP Sensor Performance Problem
P0171 - System Too Lean (Bank 1)
P0174 - System Too Lean (Bank 2)
P0507 - Idle Control System RPM Higher Than Expected

If you find something wrong clear the codes after the repair, also check the vacuum lines, if you cant find anything we should check for a vacuum leak. This video will show you how.

https://www.youtube.com/watch?v=LRKWV4Are5c

Please upload pictures or videos in your response

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Wednesday, August 20th, 2025 AT 11:52 AM