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Home/DTC Codes/Fiat/500/2012-2019 1.4L I4/C0155
C0155

Regenerative Braking Torque Sensor Fault

2012-2019 Fiat 500 1.4L I4

Moderate SeverityChassisGeneric (SAE)

Description

The torque sensor that monitors regenerative braking output is reporting invalid data.

Symptoms

  • Regen braking warning
  • Reduced energy recovery
  • Braking force inconsistent
  • Hybrid efficiency reduced

Common Causes

  • Faulty regen torque sensor
  • Sensor wiring damaged
  • Motor-generator feedback fault
  • Sensor connector corroded

Diagnostic Steps

  1. Read regen torque sensor data during braking
  2. Compare motor-generator actual torque to commanded
  3. Inspect sensor wiring
  4. Check sensor connector
  5. Test sensor through full range

Repair Notes

Replace regen braking torque sensor. Recalibrate after replacement.

Related Codes

C0150Regenerative Braking System MalfunctionC0151Regen Braking Blend Control Malfunction

Other Chassis Codes

C0155 on Other Vehicles

Fiat 124 Spider

2017-2020 1.4L I4 Turbo

Fiat 500 Abarth

2012-2019 1.4L I4 Turbo

Fiat 500 BR

2011-2020 1.4L I4 Flex Fire Evo

Fiat 500 PL

2007-2025 1.0L I3 Hybrid FireFly 70

Fiat 500 PL

2007-2025 1.2L I4 Fire 69

Fiat 500L

2014-2020 1.4L I4 Turbo

Fiat 500X

2016-2024 1.4L I4 Turbo

Fiat Argo

2017-2025 1.0L I4 Flex Firefly

Common Questions

What does code C0155 mean on a 2012-2019 Fiat 500?

C0155 stands for "Regenerative Braking Torque Sensor Fault". The torque sensor that monitors regenerative braking output is reporting invalid data.

What are the symptoms of C0155 on a Fiat 500?

Common symptoms of C0155 include: Regen braking warning, Reduced energy recovery, Braking force inconsistent, Hybrid efficiency reduced.

What causes C0155 on a 2012-2019 Fiat 500?

Common causes of C0155 include: Faulty regen torque sensor, Sensor wiring damaged, Motor-generator feedback fault, Sensor connector corroded.

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