P1257 HONDA Possible Causes
- Low engine oil level
- Low engine oil pressure
- Blocked oil passage
- Faulty VCT oil control valve
How is the P1257 HONDA code repair performed?
Start by checking the “Possible Causes” listed above. Visually inspect the wiring harness and associated connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
- Check engine light on (or service engine soon warning light)
P1257 HONDA Meaning
The VTEC system, in conjunction with the engine control module (ECM), activates the VTEC solenoid valve to control oil pressure to the VTEC mechanism which is installed in the valve system to switch valve timing between low and high. If the VTEC solenoid valve has an open circuit or short circuit, code P1257 is set.