If all else fails, the mechanic would test the Engine Control Module and check the engine for vacuum leaks. If the issue is still not resolved, the mechanic would test the throttle body motor, manifold absolute pressure sensor, and the throttle position sensor for proper function using the manufacturer’s recommended procedure. If not, the mechanic would likely run some throttle body cleaner through the throttle body to remove any carbon deposits. Next, the mechanic would inspect the inside of the throttle body to ensure that it is clean. If this does not work, the mechanic would then check the throttle body’s connections and wiring to ensure that all circuitry is in good working order. How does a mechanic diagnose the P2176 code?Ī mechanic may begin diagnosing this issue by first attempting to reprogram the Engine Control Module to correct the idle issue. ![]()
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