im having trouble with my vetc it throughs a p1259 vtec malfuction code, i checked the soleniod and it appreared to be ok, but when i am driving the car will sometimes not allow me to rev past 6000rpms it will act like i hit a rev limiter? i hooked the soleniod up to a battery and it had a faint click? i do not know what to do.... please help
2000 civic si
- Thread starter mikesi
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CEL will give you a low rev limit and basically fuck your whole shit up
i have not encountered that code before but...
quick google search
Check your VTEC oil pressure switch.
The way the VTEC oil pressure switch works is that it is a normally closed switch. The ECM sends a voltage to the switch and expects the voltage to go through the switch to ground. If the ECM reads a voltage on that circuit when the VTEC system should not be operating, it will turn on the "check engine" light and set a code. This code will be a P1259 on a vehicle with OBD-II. So if it isn't reading the voltage going to the ground, then it may think the vtec is activating when it shouldn't be. That's why it sputters around those RPM's.
i have not encountered that code before but...
quick google search
Check your VTEC oil pressure switch.
The way the VTEC oil pressure switch works is that it is a normally closed switch. The ECM sends a voltage to the switch and expects the voltage to go through the switch to ground. If the ECM reads a voltage on that circuit when the VTEC system should not be operating, it will turn on the "check engine" light and set a code. This code will be a P1259 on a vehicle with OBD-II. So if it isn't reading the voltage going to the ground, then it may think the vtec is activating when it shouldn't be. That's why it sputters around those RPM's.
