P1259Ignition System

VTEC System Malfunction (Honda/Acura, Bank 1)

P1259 is a Honda/Acura code for a VTEC system malfunction on Bank 1. The variable valve timing and lift (VTEC) system did not engage or disengage as commanded, usually due to oil pressure, the solenoid, or the pressure switch.

🚗 Yes, short-term, but you may lose the high-rpm VTEC power range.

MEDIUM

severity

🎯 Top Causes, Ranked by Likelihood

#1Faulty VTEC solenoid or pressure switch$60-$300

45%

A stuck solenoid or bad switch prevents proper VTEC operation.

#2Low or dirty engine oil$40-$120

30%

Poor oil flow prevents VTEC engagement.

#3Clogged VTEC screen or wiring fault$20-$250

25%

A blocked oil screen or wiring problem disrupts operation.

🩺 Common Symptoms

Check engine light
Loss of high-rpm power
Rough running in some cases
No VTEC engagement

💰 Repair Cost: DIY vs Shop

DIY Cost

$40-$300

Shop Cost

$150-$500

📋 Free OBD2 Code Cheat Sheet

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🔧 How to Diagnose P1259

1Check oil level and condition

2Clean or replace the VTEC solenoid and screen

3Test the VTEC pressure switch

4Inspect wiring and connectors to the solenoid

❓ Frequently Asked Questions

Can I drive with P1259?

Short-term yes, but you may lose the VTEC high-rpm power range. Fix it soon.

Is P1259 a Honda code?

Yes, P1259 is a Honda/Acura VTEC system malfunction code for Bank 1.

What causes P1259?

A faulty VTEC solenoid or pressure switch, low or dirty oil, or a clogged screen are common causes.

🔗 Related Codes

P1077P1078P0010