P0136 – O2 Sensor Circuit (Bank 1 Sensor 2)

Description

The ECM detects a fault in the downstream O2 sensor on Bank 1.

Need More Than Just the Fault Code?

A diagnostic scanner with live data, freeze-frame information and the right system access can help you investigate the actual cause before replacing parts.

Compare Diagnostic Scanners

Symptoms

  • Check engine light
  • Poor fuel economy

Causes

  • Faulty O2 sensor
  • Exhaust leaks
  • Wiring issues

Diagnosis

  • Monitor O2 data
  • Inspect exhaust
  • Check wiring

Repair

  • Replace O2 sensor
  • Fix leaks