Mechanics

ENGINE HESITATION

2005 Toyota Corolla • 140,000 miles

I occassionally have engine hestitation, especially when I slow down at a traffic and about to pedal down to move again the engine rpm drops & I have to off the engine and restart several times before the engine picks up on good rpm to move again. Tried cleaning the Airflow sensor but no success. The system diagnosis reads the following;
1. PO420; Catalyst System Efficiency Below Threshold (Blank 1)
2. P0657; Actuator Supply Voltage Circuit/Open
3. P2116; Throttle Actuator control motor Current Range/Performance
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Precious Man
April 23, 2013.



420. You need a new cat converter

657 is the one you need checked as it may be your issue

2116 is fly by wire failure from either the throttle body or pedal sensor.

You cannot clean a mass air flow.

Roy

ASEMaster6371
Apr 23, 2013.