2009 Civic in limp mode - error codes
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2009 Civic in limp mode - error codes
My 2009 Civic works fine when it is cold. When the engine warms up it won't go past 3,500 RPM. I've learned from these forums that is limp mode or safe mode to protect the engine. I've scanned the error codes and am including them below. Any suggestions on what they mean or what other diagnostics or repairs you'd recommend?
P0103
and
P2646
Thanks!
P0103
and
P2646
Thanks!
Honda-Tech Member
Joined: Sep 2003
Posts: 8,117
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From: Toronto, Canada but from Montreal
Re: 2009 Civic in limp mode - error codes
P0103 Honda - Mass Air Flow Sensor Circuit High Voltage
Possible issues:
Faulty mass air flow sensor
Intake air leaks
Dirty mass air flow sensor
Dirty mass air filter
Mass air flow sensor harness is open or shorted
Mass air flow sensor circuit poor electrical connection
P2646 Honda - VTEC Oil Pressure Switch Circuit Low Voltage
Check engine oil level and pressure
Faulty VTEC Oil Pressure Switch
VTEC Oil Pressure Switch harness is open or shorted
VTEC Oil Pressure Switch circuit poor electrical connection
That should put you along the right course of what to look for...
Possible issues:
Faulty mass air flow sensor
Intake air leaks
Dirty mass air flow sensor
Dirty mass air filter
Mass air flow sensor harness is open or shorted
Mass air flow sensor circuit poor electrical connection
P2646 Honda - VTEC Oil Pressure Switch Circuit Low Voltage
Check engine oil level and pressure
Faulty VTEC Oil Pressure Switch
VTEC Oil Pressure Switch harness is open or shorted
VTEC Oil Pressure Switch circuit poor electrical connection
That should put you along the right course of what to look for...
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Joined: Jun 2018
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Re: 2009 Civic in limp mode - error codes
My car was running fine wouldent start up one morning so i took to the shop and they had a coupel days first they said timing was off by a tooth then he said he was wrong it was fuel pump now i got car back and it only revs to 3500 rpms i have a crank shaft position sendon code up i checked it is unplugged if you plug it in car wont start please help
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