OBD Guide
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P149A

Evaporative Emission System Shutoff Valve 2 Control Circuit

P149A is an OBD-II diagnostic trouble code meaning: Evaporative Emission System Shutoff Valve 2 Control Circuit. Common causes: open or short circuit in wiring harness, oxidation of valve connector contacts. 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 Is On
  • Slight increase in fuel consumption
  • The smell of gasoline in or around the car
  • Dips during overclocking (rare)

Causes

  • Open or short circuit in wiring harness
  • Oxidation of valve connector contacts
  • EVAP solenoid valve malfunction
  • Relay or fuse problems
  • Malfunction of the engine control unit (rare)

How to Fix

  1. Check EVAP system fuse and relay
  2. Inspect the wiring harness for damage
  3. Check EVAP valve resistance
  4. Clean valve connector contacts
  5. If necessary, replace the EVAP valve

Related codes

P0443P0458P0496

FAQ

What does the P149A code mean?

P149A is an OBD-II diagnostic trouble code that indicates: Evaporative Emission System Shutoff Valve 2 Control Circuit

What causes a P149A error code?

The most common causes of P149A include: Open or short circuit in wiring harness; Oxidation of valve connector contacts; EVAP solenoid valve malfunction; Relay or fuse problems.

How do I fix a P149A diagnostic trouble code?

To fix P149A: Check EVAP system fuse and relay. Inspect the wiring harness for damage. Check EVAP valve resistance. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P149A?

Yes, but get it checked soon

How much does it cost to fix P149A?

The estimated repair cost for P149A is $17–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat