P1138 - Swirl Control Valve Control System Performance

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3   
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P1138 Possible Causes

  • Faulty Swirl Control Valve Control Position Sensor
  • Swirl Control Valve Control Position Sensor harness is open or shorted
  • Swirl Control Valve Control Position Sensor circuit poor electrical connection
  • Faulty Swirl Control Valve

First diagnose P1138 code

    Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Cost of diagnosing the P1138 code

    Labor: 1.0

    The cost of diagnosing the P1138 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

P1138 Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1138 Description

While idling and during low engine coolant temperature, the swirl control valve closes, Thus the velocity of the air in the intake passage increases, promoting the vaporization of the fuel and producing a swirl in the combustion chamber.
Because of this operation, this system tends to increase the burning speed of the gas mixture, improve fuel consumption, and increase the stability in running conditions.
Also, except when idling and during low engine coolant temperature, this system opens the swirl control valve.
In this condition, this system tends to increase power by improving intake efficiency via reduction of intake flow resistance, intake flow.
The swirl control valve is operated by the Engine Control Module (ECM).
OBDII Code P1138 - Swirl Control Valve Control System Performance - AutoCodes.com

P1138 More Information

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