Honda Civic / Del Sol (1992 - 2000) EG/EH/EJ/EK/EM1 Discussion

check engine light code - vtec spool solenoid valve (code 21)

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Old Apr 15, 2009 | 10:30 AM
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ek4_b16a's Avatar
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From: Saint Paul, MN, USA
Default check engine light code - vtec spool solenoid valve (code 21)

Okay, so today i decided to flush and fill my coolant. After finishing up with that, i get the check engine light. I checked on it by doing the 2 wire jumper and found out to be code 21.

I unclipped both sensors off the solenoid/pressure switch, and unbolted the thing off. I was thinking and hoping it was just a blocked screen in the solenoid, but it was clean! Took the actual solenoid off to check to see if that was clogged too, but nothing! I have clean oil as of friday the 10th.

now I just don't understand why i would be getting code 21 after flushing and filling my coolant? Can someone on H-T help me out on this? T-I-A!!!


Soua
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Old Apr 15, 2009 | 10:41 AM
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Default Re: check engine light code - vtec spool solenoid valve (code 21)

you may of just clipped a wire causing a bad connection. try reseting the ecu and check connections. and see if you have vtec. happend to me once and im still not sure witch 1 solved my problem!
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Old Apr 15, 2009 | 10:44 AM
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Default Re: check engine light code - vtec spool solenoid valve (code 21)

yea, i rechecked my wiring and just refixed what was done a few years ago. hopefully after resetting the ecu, it'll be fixed for good! thanks for your input! I'll post up if i fix it!


soua
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Old Apr 15, 2009 | 10:53 AM
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Default Re: check engine light code - vtec spool solenoid valve (code 21)

good look!
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Old Apr 15, 2009 | 02:34 PM
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Default Re: check engine light code - vtec spool solenoid valve (code 21)

when i went to take the thermostat housing off, i must've pulled the wires apart from eachother. rewired them up, resetted the ecu, and voila! No check engine light anymore!!

Earlier I only redid the pressure sensor and not the solenoid sensor. it was still taped up, but not connected! So it's cool...

Thanks Robbys89!


soua
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Old Apr 15, 2009 | 03:43 PM
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Default Re: check engine light code - vtec spool solenoid valve (code 21)

Originally Posted by ek4_b16a
when i went to take the thermostat housing off, i must've pulled the wires apart from eachother. rewired them up, resetted the ecu, and voila! No check engine light anymore!!

Earlier I only redid the pressure sensor and not the solenoid sensor. it was still taped up, but not connected! So it's cool...

Thanks Robbys89!


soua
no problem
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