OBD Guide
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P149C

Evaporative Emission System Shutoff Valve 2 Control Circuit High

P149C is an OBD-II diagnostic trouble code meaning: Evaporative Emission System Shutoff Valve 2 Control Circuit High. Common causes: short circuit to power in the control circuit, evap 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 Is On
  • Possible problems starting the engine
  • Increased fuel consumption
  • The smell of gasoline in or around the car

Causes

  • Short circuit to power in the control circuit
  • EVAP solenoid valve malfunction
  • Broken or damaged wiring harness
  • Problems with the engine control unit (ECU)
  • Corrosion of contacts or connectors

How to Fix

  1. Check the integrity of the wiring harness to the EVAP valve
  2. Measure EVAP valve resistance
  3. Check control circuit voltage
  4. Replace faulty EVAP valve if necessary
  5. Clean or replace damaged connectors

Related codes

P149BP149DP0446

FAQ

What does the P149C code mean?

P149C is an OBD-II diagnostic trouble code that indicates: Evaporative Emission System Shutoff Valve 2 Control Circuit High

What causes a P149C error code?

The most common causes of P149C include: Short circuit to power in the control circuit; EVAP solenoid valve malfunction; Broken or damaged wiring harness; Problems with the engine control unit (ECU).

How do I fix a P149C diagnostic trouble code?

To fix P149C: Check the integrity of the wiring harness to the EVAP valve. Measure EVAP valve resistance. Check control circuit voltage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P149C?

Yes, but get it checked soon

How much does it cost to fix P149C?

The estimated repair cost for P149C is $17–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat