01 C0110 - Pump Motor Circuit Malfunction • 02 How to Increase Horsepower in a Naturally Aspirated Engine • 03 What Happens If You Shift to First Gear at High Speed? • 04 This Easy Sensor Cleaning Trick Fixes Half of Modern Car Is… • 05 Should I Press the Clutch Every Time I Need to Apply Brakes… • 06 From Tires to Driveshafts: An Expert Explains Why Your Car … • 07 The Latest Advances in 3D Printing: How This Technology is … • 08 What Happens If You Drive a Keyless Car Without the Key? • 09 P0106: Manifold Absolute Pressure (MAP) System Performance • 10 Is it Okay to Put New Brake Pads on Old Rotors? •

DTC codes / Mitsubishi codes / P1102

P1102 · MitsubishiTraction Control Ventilation Solenoid Circuit Fault

P1102 on a Mitsubishi means the traction control system has detected an electrical fault in the ventilation solenoid circuit, which is part of the hydraulic modulator assembly. The computer monitors the solenoid's coil and wiring for expected voltage and current, and when the signal falls outside the valid range it logs this code and disables traction control.

SystemPowertrain
Code typeMitsubishi specific
SeverityMedium
Fix difficultyProfessional
AreaFuel and air metering

Symptoms you may notice

  • Traction control warning light illuminated on the dashboard
  • Anti-lock braking system (ABS) warning light may also be on because the systems share the hydraulic modulator
  • Traction control system disabled, often indicated by a message or the light staying on
  • Often no symptoms besides the warning light, with normal braking performance
  • In rare cases, a slight brake drag or uneven braking if the solenoid sticks partially open
  • Electronic stability control (ESC) may also be disabled if equipped

Common causes, most likely first

  1. Damaged or corroded wiring harness or connector at the traction control modulator
  2. Failed ventilation solenoid coil inside the hydraulic modulator assembly
  3. Blown fuse or poor ground connection for the traction control module
  4. Internal fault in the traction control module (less common)
  5. Contamination or debris in the brake fluid causing solenoid valve sticking
  6. Aftermarket electrical accessories improperly tapped into the circuit

How to diagnose and fix it

  1. Scan all modules for codes and record freeze-frame data to confirm P1102 is current
  2. Inspect the wiring harness and connector at the hydraulic modulator for chafing, corrosion, or loose pins
  3. Check the traction control system fuse and verify good ground connections
  4. Measure resistance across the ventilation solenoid coil and compare to factory specification
  5. Perform a bidirectional actuator test on the solenoid with a capable scan tool to confirm operation
  6. If the solenoid coil is open or shorted, replace the hydraulic modulator assembly or solenoid as required
  7. Clear codes and perform a road test to verify the repair and ensure traction control operates correctly

What Mitsubishi techs check before replacing the modulator

  • A weak or failing battery can cause this code because the traction control module may log a solenoid circuit fault when system voltage drops during cranking.
  • Corrosion inside the connector at the modulator is a common cause that is often overlooked, so always inspect the pins and seals before condemning the solenoid.
  • The ventilation solenoid is part of the hydraulic modulator on most Mitsubishi models, meaning a failed solenoid often requires replacing the entire assembly rather than a separate part.
  • This code can be set by a sticking solenoid valve caused by contaminated brake fluid, so a fluid flush may resolve the issue if the coil tests good.
  • Do not confuse P1102 with engine-related codes; it is specific to the traction control system and should be diagnosed with a scan tool capable of accessing the ABS/ESC module.

Can I keep driving with P1102?

You can usually continue driving because the base braking system remains functional, but traction control and stability control are disabled, so avoid slippery conditions and aggressive driving. Have the fault diagnosed soon to prevent further damage to the modulator.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

Guidance is general and written for Mitsubishi vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

Running on fumes Free guides aren't free to make. Top up the tank. Any amount, one time. Fuel the Garage