P1137 – Mazda DTC

Mazda DTC P1137 – HO2S Bank 1 Sensor 2 Not Switching (Fuel Control Limit Reached)

DTC P1137 meaning on Mazda

DTC P1137 on a Mazda indicates that the Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2 is not switching properly. This means that the sensor is not providing the expected feedback to the engine control module regarding the air-fuel mixture.

Mazda DTC P1137 symptoms

Symptoms of DTC P1137 on a Mazda may include:

• Check Engine Light illuminated
• Poor fuel economy
• Rough idling
• Engine hesitation or stalling

Mazda DTC P1137 causes

Common causes of DTC P1137 on a Mazda include:

• Failed Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2
• Wiring or connector issues in the sensor circuit
• Exhaust leaks affecting sensor performance
• Engine running too rich or too lean

Mazda DTC P1137 seriousness

DTC P1137 should not be ignored as it can lead to poor engine performance and decreased fuel efficiency. Continuing to drive with this fault may cause further damage to the engine components.

How to diagnose DTC P1137 on Mazda

To diagnose DTC P1137 on a Mazda, you can:

1. Use an OBD-II scanner to retrieve the fault code and freeze frame data
2. Inspect the wiring and connectors of the HO2S Bank 1 Sensor 2
3. Check for exhaust leaks near the sensor
4. Perform a visual inspection of the sensor for any physical damage

How to fix DTC P1137 on Mazda

To fix DTC P1137 on a Mazda, you may need to:

1. Replace the Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2
2. Repair any damaged wiring or connectors in the sensor circuit
3. Address any exhaust leaks affecting sensor performance
4. Ensure the engine is running at the correct air-fuel ratio

How to erase DTC P1137 on Mazda

To erase DTC P1137 on a Mazda, you can:

1. Use an OBD-II scanner to clear the fault code
2. After fixing the underlying issue, clear the code and perform a test drive to ensure the problem is resolved

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