P0167 – OBD-II DTC

OBD-II DTC P0167 – O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 3)

DTC P0167 meaning

DTC P0167 indicates that the Engine Control Module (ECM) has detected a problem with the oxygen sensor circuit for Bank 2 Sensor 3. This code signifies that the ECM is not receiving any activity or signal from the specified oxygen sensor, which is crucial for monitoring exhaust emissions and optimizing engine performance.

DTC P0167 symptoms

Common symptoms associated with DTC P0167 may include:

• Check Engine Light illuminated
• Decreased fuel efficiency
• Rough engine idle
• Increased emissions
• Failed emissions test

DTC P0167 causes

Several factors can lead to the occurrence of DTC P0167, including:

• Faulty oxygen sensor (Bank 2 Sensor 3)
• Wiring issues, such as shorts or open circuits in the sensor circuit
• Corroded or damaged connectors
• ECM malfunction
• Exhaust leaks affecting sensor readings

DTC P0167 seriousness

DTC P0167 is considered a moderate to serious issue. While the vehicle may still operate, the lack of a functioning oxygen sensor can lead to:

• Increased fuel consumption
• Higher emissions, potentially causing environmental harm
• Long-term engine damage if not addressed

How to diagnose DTC P0167

To diagnose DTC P0167, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the code.
2. Inspect the wiring and connectors for Bank 2 Sensor 3 for any visible damage or corrosion.
3. Check the oxygen sensor’s resistance and voltage output using a multimeter.
4. Test the ECM for proper function and ensure it is receiving signals from the sensor.
5. Look for any exhaust leaks that may affect sensor performance.

How to fix DTC P0167 step-by-step instructions

To fix DTC P0167, follow these steps:

1. Inspect and repair any damaged wiring or connectors related to Bank 2 Sensor 3.
2. If the oxygen sensor is faulty, replace it with a new one.
3. Clear any exhaust leaks that may be present.
4. Reconnect all connectors and ensure they are secure.
5. Re-scan the vehicle with an OBD-II scanner to confirm the code is cleared.

How to erase DTC P0167

To erase DTC P0167, you can follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn the ignition key to the “On” position without starting the engine.
3. Access the scanner’s menu and select the option to clear or erase trouble codes.
4. Confirm the action and wait for the scanner to complete the process.
5. Disconnect the scanner and start the vehicle to ensure the code does not reappear.

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