P1253 ISUZU – VTEC System Malfunction

P1253 ISUZU Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P1253 ISUZU Possible Causes

Engine oil level low,Low engine oil pressure,Blocked oil passage,Faulty VCT oil control valve

P1253 ISUZU Description

The VTEC system, in conjunction with the Engine Control Module (ECM), activates the VTEC solenoid valve to control oil pressure to the VTEC mechanism that is installed in the valve system to switch valve timing between Low and High. If the VTEC solenoid valve has an open or short circuit, a DTC is stored.