For Shop Owners

P1259 HONDA - VTEC System Malfunction

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3 What does this mean?

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
What does this mean?

Tech notes









User Submitted Video
What does this mean?

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 HONDA 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.
OBDII Code P1259 Honda - VTEC System Malfunction - itimaster.ru

P1259 HONDA Information for specific Honda models

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P1259 HONDA Comments

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Repair Importance Level: 3
1=Low 2=Medium 3=High
Repair Difficulty Level: 3
1=Easy 2=Moderate 3=Hard

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