OBD Guide
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P1490

Vacuum Cut Valve Bypass Valve

P1490 is an OBD-II diagnostic trouble code meaning: Vacuum Cut Valve Bypass Valve. Common causes: open or short circuit in valve circuit, solenoid valve malfunction. Estimated repair cost: $17–56.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–56 (est.)

Symptoms

  • Check Engine light comes on
  • Unstable engine idling
  • Deteriorating fuel economy
  • Dips during acceleration
  • Problems with the EGR system

Causes

  • Open or short circuit in valve circuit
  • Solenoid valve malfunction
  • Damage to vacuum hoses
  • Problems with the engine control unit
  • Mechanical valve failure

How to Fix

  1. Check the integrity of the vacuum hoses
  2. Check valve electrical circuit
  3. Check valve resistance and operation
  4. Replace faulty valve
  5. Reset the error code and check the system

Related codes

P1489P1491P1492

Error P1490 by Vehicle Brand

DodgeJeepMitsubishiNissanPlymouthPontiac

FAQ

What does the P1490 code mean?

P1490 is an OBD-II diagnostic trouble code that indicates: Vacuum Cut Valve Bypass Valve

What causes a P1490 error code?

The most common causes of P1490 include: Open or short circuit in valve circuit; Solenoid valve malfunction; Damage to vacuum hoses; Problems with the engine control unit.

How do I fix a P1490 diagnostic trouble code?

To fix P1490: Check the integrity of the vacuum hoses. Check valve electrical circuit. Check valve resistance and operation. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1490?

Yes, but get it checked soon

How much does it cost to fix P1490?

The estimated repair cost for P1490 is $17–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat