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Home/DTC Codes/Mazda/CX-3/2016-2021 2.0L I4/P0154
P0154

O2 Sensor Circuit No Activity Bank 2 Sensor 1

2016-2021 Mazda CX-3 2.0L I4

Moderate SeverityPowertrainGeneric (SAE)

Description

No switching activity from the upstream O2 sensor on Bank 2.

Symptoms

  • Check Engine Light
  • Poor fuel economy

Common Causes

  • Faulty sensor
  • Heater failure
  • Wiring open

Diagnostic Steps

  1. Test sensor signal
  2. Check heater
  3. Inspect wiring

Repair Notes

Replace O2 sensor.

Related Codes

P0150O2 Sensor Circuit Bank 2 Sensor 1P0155O2 Sensor Heater Circuit Bank 2 Sensor 1

Other Powertrain Codes

P0154 on Other Vehicles

Mazda 626

1993-1997 2.0L I4

Mazda 626

1993-1997 2.5L V6

Mazda 626

1998-2002 2.0L I4

Mazda 626

1998-2002 2.5L V6

Mazda Axela

2013-2019 1.5L I4 P5-VPS

Mazda B2300

1994-1997 2.3L I4

Mazda B2300

2002-2009 2.3L I4

Mazda B2500

1998-2001 2.5L I4

Common Questions

What does code P0154 mean on a 2016-2021 Mazda CX-3?

P0154 stands for "O2 Sensor Circuit No Activity Bank 2 Sensor 1". No switching activity from the upstream O2 sensor on Bank 2.

What are the symptoms of P0154 on a Mazda CX-3?

Common symptoms of P0154 include: Check Engine Light, Poor fuel economy.

What causes P0154 on a 2016-2021 Mazda CX-3?

Common causes of P0154 include: Faulty sensor, Heater failure, Wiring open.

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