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Home/DTC Codes/Chevrolet/Express/2003-2024 4.3L V6/P0155
P0155

O2 Sensor Heater Circuit Bank 2 Sensor 1

2003-2024 Chevrolet Express 4.3L V6

Low SeverityPowertrainGeneric (SAE)

Description

Malfunction in the upstream O2 sensor heater on Bank 2.

Symptoms

  • Check Engine Light
  • Extended warmup emissions

Common Causes

  • Faulty heater
  • Blown fuse
  • Wiring issue

Diagnostic Steps

  1. Check fuse
  2. Test heater resistance
  3. Inspect wiring

Repair Notes

Replace O2 sensor.

Related Codes

P0050HO2S Heater Control Circuit Bank 2 Sensor 1P0150O2 Sensor Circuit Bank 2 Sensor 1P0154O2 Sensor Circuit No Activity Bank 2 Sensor 1

Other Powertrain Codes

P0155 on Other Vehicles

Chevrolet Astro

1995-2005 4.3L V6 Vortec

Chevrolet Avalanche

2002-2006 5.3L V8 Vortec

Chevrolet Avalanche

2002-2006 8.1L V8 Vortec

Chevrolet Avalanche

2007-2013 5.3L V8 Vortec

Chevrolet Avalanche

2007-2013 6.0L V8 Vortec

Chevrolet Aveo

2012-2018 1.6L I4

Chevrolet Beat

2018-2021 1.2L I4

Chevrolet Beretta

1990-1996 2.2L I4

Common Questions

What does code P0155 mean on a 2003-2024 Chevrolet Express?

P0155 stands for "O2 Sensor Heater Circuit Bank 2 Sensor 1". Malfunction in the upstream O2 sensor heater on Bank 2.

What are the symptoms of P0155 on a Chevrolet Express?

Common symptoms of P0155 include: Check Engine Light, Extended warmup emissions.

What causes P0155 on a 2003-2024 Chevrolet Express?

Common causes of P0155 include: Faulty heater, Blown fuse, Wiring issue.

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