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Home/DTC Codes/Acura/TSX/2011-2011 3.5L V6/C0120
C0120

Electronic Parking Brake Motor Circuit

2011-2011 Acura TSX 3.5L V6

High SeverityChassisGeneric (SAE)

The 2011 Acura TSX is equipped with a 3.5L V6 engine. Below you'll find detailed c0120 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.

Description

Malfunction in the electronic parking brake actuator motor circuit.

Symptoms

  • Parking brake warning light
  • EPB will not apply or release
  • Audible grinding from rear brakes
  • Hill-hold assist inoperative

Common Causes

  • EPB motor failure
  • Wiring to EPB motor damaged
  • EPB module failure
  • Motor connector corroded

Diagnostic Steps

  1. Test EPB motor by commanding apply/release with scan tool
  2. Check motor connector for corrosion
  3. Test motor winding resistance
  4. Inspect wiring harness
  5. Check EPB module outputs

Repair Notes

Replace EPB motor/caliper assembly. EPB systems typically require scan tool for service mode before pad replacement.

Related Codes

C0121Electronic Parking Brake Motor OvercurrentC0122Electronic Parking Brake Switch Circuit

Other Chassis Codes

C0120 on Other Vehicles

Acura ILX

2013-2013 2.0L I4

Acura ILX

2013-2013 2.4L I4

Acura ILX

2014-2014 2.0L I4

Acura ILX

2014-2014 2.4L I4

Acura ILX

2015-2015 2.0L I4

Acura ILX

2015-2015 2.4L I4

Acura ILX

2016-2016 2.4L I4

Acura ILX

2017-2017 2.4L I4

Common Questions

What does code C0120 mean on a 2011-2011 Acura TSX?

C0120 stands for "Electronic Parking Brake Motor Circuit". Malfunction in the electronic parking brake actuator motor circuit.

What are the symptoms of C0120 on a Acura TSX?

Common symptoms of C0120 include: Parking brake warning light, EPB will not apply or release, Audible grinding from rear brakes, Hill-hold assist inoperative.

What causes C0120 on a 2011-2011 Acura TSX?

Common causes of C0120 include: EPB motor failure, Wiring to EPB motor damaged, EPB module failure, Motor connector corroded.

Last updated: March 2026

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