Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
To diagnose the P1137 Subaru code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.
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.
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