P2187 Moderate Powertrain

System Too Lean at Idle (Bank 1)

Common Causes

Vacuum leak most prominent at idle
Failed PCV valve or hose
Dirty throttle body reducing idle airflow compensation
Faulty IAC or electronic throttle body

Common Symptoms

Rough Idle Engine Surging at Idle

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Quick Info

Code P2187
System Powertrain
Severity Moderate

Disclaimer

This information is for diagnostic guidance only. Always verify repairs with a qualified technician before performing safety-critical work.

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