P1259 vtec really sucks
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P1259 vtec really sucks
I got fresh oil, switched 2 solenoids and 2 vtec oil sensors and 2 vtec housings... still get p1259... only other thing could be fuel pressure? So either the fuel pressure regulator or fuel pump could have low pressure?... the vtec wire is cut and twisted on the harness side.
Last edited by 310civicEX; Sep 25, 2018 at 05:02 PM.
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Re: P1259 vtec really sucks
only other thing could be fuel pressure? So either the fuel pressure regulator or fuel pump could have low pressure?
Fuel problems would give you very different symptoms and codes.
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This is completely different circuit than the low level oil sender.
Honda engineers are pretty smart and I have no doubt they also built in other safety features.
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But is it?
There are many different possible causes for the vtec code.
Do you understand how the valve is suoopsed to work, and what the computer has to see in order to stay happy?
Got FF data? What rpm was it when the code set?
What all work has heen done to your engine recrntly, again? Refresh my memory.
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That should read "could be low OIL pressure".
But is it?
There are many different possible causes for the vtec code.
Do you understand how the valve is suoopsed to work, and what the computer has to see in order to stay happy?
Got FF data? What rpm was it when the code set?
What all work has heen done to your engine recrntly, again? Refresh my memory.
But is it?
There are many different possible causes for the vtec code.
Do you understand how the valve is suoopsed to work, and what the computer has to see in order to stay happy?
Got FF data? What rpm was it when the code set?
What all work has heen done to your engine recrntly, again? Refresh my memory.
If you think a good mechanic is expensive, try hiring a bad one
Joined: Dec 2011
Posts: 32,017
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From: Midwest. Aiming about mid-chest
Rep Power: 518 Re: P1259 vtec really sucks
I want to know what the RPM was when the fault code set . THAT is what Freeze Frame data is for.
If you have live data, does it show VTEC on/off?
Does it also show the vtec pressure switch on/off?
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I got it all together. .is there a way to check if it's good? I reved it up to 5500 rpm and the light never came on.
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From: Midwest. Aiming about mid-chest
Rep Power: 518 Re: P1259 vtec really sucks
I might assume it must have set the code at high rpm when vtec would have been activated?
I have used test lights and voltmeters to monitor the vtec command and response .
Did you have the cylinder head off this engine just before the vtec code came up?
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