VTEC System Malfunction


Table of contents

P1259 ACURA Possible Causes

  • Low engine oil level or oil pressure
  • Faulty Variable Valve Timing and Lift Electronic Control (VTEC) solenoid
  • VTEC Solenoid harness is open or shorted
  • VTEC circuit poor electrical connection
  • Faulty VTEC oil pressure switch

How do I fix code P1259 ACURA?

  Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.

Tech Notes


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Cost of diagnosing the P1259 ACURA code

  The cost of diagnosing the P1259 ACURA code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

When is the code detected

  The P1259 is set when there is a problem in the VTEC Oil Pressure Switch circuit or VTEC Solenoid Valve circuit

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1259 ACURA Description

  The Variable Valve Timing and Lift Electronic Control (VTEC) system activate the VTEC solenoid valve by the command from the Powertrain Control Module (PCM), and it charges/discharges the hydraulic circuit of the VTEC mechanism that is installed in the valve system to switch valve timing between Low and High. The PCM monitors oil pressure conditions in the hydraulic circuit of the VTEC mechanism according to the VTEC oil pressure switch downstream of the VTEC solenoid valve. If there is a disparity between oil pressure condition in the hydraulic circuit that is determined by the PCM command, and the oil pressure condition that is determined by the status of the VTEC oil pressure switch, the system is considered faulty and the P1259 code is stored.

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