Engine-Codes - Subaru - P1137 SUBARU

P1137 SUBARU - Oxygen Sensor Circuit Bank 1 Sensor 1

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3  What is this?
Table of contents

P1137 SUBARU Possible Causes

  • Faulty Front Oxygen A/F Sensor 11
  • Front Oxygen A/F Sensor 11 harness is open or shorted
  • Front Oxygen A/F Sensor 11 circuit poor electrical connection
  • Faulty Engine Control Module (ECM)

How is the P1137 SUBARU code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Tech Notes

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What is the cost to diagnose the P1137 SUBARU code

Labor: 1.0

The cost to diagnose the P1137 SUBARU code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
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Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1137 SUBARU Meaning

The sensor contains a pumping cell and a reference cell separated by a porous diffusion gap. The purpose of the pumping cell is to allow oxygen ions into or out of the reference cell depending on demand. The reference cell must be kept at a lambda value of 1.
The Engine Control Module (ECM) supplies the pumping cell with current so that sensor output voltage from the reference stays constant.
When the reference cell is lean, a positive current is used to pump oxygen out the cell.
When the reference cell is rich, a negative current is used to pump oxygen into the cell.
When the reference cell is at lambda 1, there will be no current applied to the pumping cell. The amount of current supplied is proportional to the amount of oxygen in the exhaust gases. The ECM uses the amount of current as a signal. The ECM uses the signal to calculate the actual air to fuel ratio. The injection duration is altered accordingly.
The sensor operates correctly only when it reaches a certain temperature. The heating element brings the sensor up to operating temperature quickly.

More Information

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