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HondaPlatinum
HondaPlatinum, A Technician
Category: Honda
Satisfied Customers: 11332
Experience:  13 year honda platinum level
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2009 Honda Accord V6 142,000 miles. Battery light came on

Customer Question

2009 Honda Accord V6 142,000 miles. Battery light came on then out and back on and off again. Experience almost like a sputter -- hiccup -- hesitation? Approx. 1-2 seconds. cleared up and repeated after about 10 miles-- Able to get car home and checked for loose cables/wires -- none found. Had a car several years ago that acted similarly-- was catalytic converter. Any ideas?
Submitted: 11 months ago.
Category: Honda
Expert:  Christopher Trevino replied 11 months ago.

Hello there, honestly this can be fairly difficult to troubleshoot or diagnose over the internet without physically seeing the vehicle. With your other vehicle, the plugged cat converter , will cause the hesitation at idle under a slight engine load so the decreased engine speed will cause the alternator to undercharge giving you an intermittent battery light. So, true, checking for restrictions in the exhaust and intake systems would be a good start. Also, vacuum leaks , Idle air control valve (IAC), Mass Airflow sensor and other engine control systems may need to be checked. Are there any service lights on ? Does this problem go away after the engine is thoroughly warmed up? Does this symptom only occur in drive at idle or driving highway speeds? any additional info will help better assist you here. Thank you, -Chris

Customer: replied 11 months ago.
No other service lights on. This happen at highways speeds. Had been driving at 65-70 mph for 45 minutes. Car did have an unusual start up prior to this trip -- Started and immediately "choked" off, restart and same results -- then gave more gas and engine stayed on with a small amount of smoke out of tailpipe (never had this happen before.
Customer: replied 11 months ago.
Still there?
Expert:  Christopher Trevino replied 11 months ago.

Ok got it, usually from this point I would check for excessive carbon build up behind the throttle plate. Cleaning excessive carbon build up will improve idle conditions. Possibly running an intake cleaner through the vacuum lines will clean carbon off of the intake valves. This service is called Throttle body and fuel system cleaning. Aside from this,if this service has recently been performed , the symptoms you explained would lead me to suspect a faulty EGR valve.

Expert:  Christopher Trevino replied 11 months ago.

One simple check you can make, would be to check the spark plugs for dark wet spots that would suggest fuel fouling or a rich condition. This would indicate an excessive fuel condition. Just to inform, to solve any drivability issues without engine codes activated, we would need to connect a specific scan tool that can communicate with the vehicles Engine control module to view and read engine data in a live mode. This is where it gets a little more technical. Let me know if you can make the generic checks above and what conclusions you get and hopefully I can steer you in the right direction. Thank you,