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2002 MAZDA 626

2.0L I4•FWD•AUTOMATIC•gas
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Repairs0Labor563Torque3481Fluid6DTC697Battery0Maintenance0Recalls0
P0156moderate severityPowertrain

O2 Sensor Circuit Bank 2 Sensor 2

on 2002 Mazda 626 2.0L I4 · FWD

What this code means

General malfunction in the downstream O2 sensor on Bank 2.

Symptoms

  • Check Engine Light
  • Failed emissions

Common causes

  • Faulty sensor
  • Wiring issue
  • Exhaust leak

Diagnostic steps

  1. Test sensor voltage
  2. Inspect wiring
  3. Check for leaks

Repair notes

Replace sensor.

Other Powertrain codes on this vehicle

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