P1135 – Mazda DTC

Mazda DTC P1135 – HO2S Bank 1 Sensor 1 Heater Circuit Low Input

DTC P1135 meaning on Mazda

DTC P1135 on a Mazda indicates an issue with the Heater Circuit of the HO2S (Heated Oxygen Sensor) Bank 1 Sensor 1. This code specifically points to a low input signal detected in the heater circuit of the oxygen sensor.

Mazda DTC P1135 symptoms

Symptoms of DTC P1135 on a Mazda may include:

• Check Engine Light illuminated on the dashboard
• Decreased fuel efficiency
• Engine running rough or misfiring

Mazda DTC P1135 causes

Common causes of DTC P1135 on a Mazda include:

• Faulty oxygen sensor
• Wiring or connector issues in the sensor circuit
• Blown fuse related to the sensor heater circuit

Mazda DTC P1135 seriousness

While DTC P1135 may not cause immediate drivability issues, it can lead to decreased fuel efficiency and potential long-term engine problems if left unresolved. It is recommended to address this code promptly.

How to diagnose DTC P1135 on Mazda

To diagnose DTC P1135 on a Mazda, follow these steps:

1. Use an OBD-II scanner to retrieve the specific fault code.
2. Inspect the wiring and connectors related to the Bank 1 Sensor 1 oxygen sensor.
3. Check the fuse related to the sensor heater circuit for continuity.
4. Test the oxygen sensor itself for proper operation.

How to fix DTC P1135 on Mazda

To fix DTC P1135 on a Mazda, consider the following:

1. Replace the Bank 1 Sensor 1 oxygen sensor if faulty.
2. Repair any damaged wiring or connectors in the sensor circuit.
3. Replace the fuse if found to be blown.

How to erase DTC P1135 on Mazda

To erase DTC P1135 on a Mazda, you can:

1. Use an OBD-II scanner to clear the fault code after the underlying issue has been resolved.
2. Alternatively, disconnecting the vehicle’s battery for a few minutes may also clear the code.

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