P0164 – OBD-II DTC

OBD-II DTC P0164 – O2 Sensor Circuit Low Voltage (Bank 2 Sensor 3)

DTC P0164 meaning

DTC P0164 indicates a low voltage condition in the oxygen sensor circuit for Bank 2 Sensor 3. This code is part of the On-Board Diagnostics II (OBD-II) system, which monitors the performance of the vehicle’s emissions control system. Bank 2 refers to the side of the engine that does not contain cylinder number one, while Sensor 3 typically refers to a downstream oxygen sensor located after the catalytic converter.

DTC P0164 symptoms

Common symptoms associated with DTC P0164 may include:

• Check Engine Light (CEL) illuminated
• Decreased fuel efficiency
• Rough idling or stalling
• Increased emissions
• Failed emissions test

DTC P0164 causes

Several factors can lead to the triggering of DTC P0164, including:

• Faulty oxygen sensor
• Wiring issues, such as shorts or open circuits
• Corroded or loose connectors
• Exhaust leaks near the sensor
• Faulty Engine Control Module (ECM)

DTC P0164 seriousness

DTC P0164 is considered a moderate to serious issue. While it may not cause immediate engine damage, it can lead to:

• Increased emissions, contributing to environmental pollution
• Reduced fuel efficiency, leading to higher operating costs
• Potential damage to the catalytic converter if left unaddressed

How to diagnose DTC P0164

To diagnose DTC P0164, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the code.
2. Inspect the oxygen sensor and its wiring for visible damage.
3. Check the sensor’s voltage output using a multimeter.
4. Examine the connectors for corrosion or loose connections.
5. Look for exhaust leaks that may affect sensor readings.
6. Test the ECM for proper function if all other components are in good condition.

How to fix DTC P0164 step-by-step instructions

To fix DTC P0164, follow these steps:

1. Disconnect the battery to ensure safety while working on the electrical system.
2. Inspect and repair any damaged wiring or connectors related to the oxygen sensor.
3. If the oxygen sensor is faulty, replace it with a new one.
4. Ensure that all connections are secure and free of corrosion.
5. Check for and repair any exhaust leaks that may affect sensor performance.
6. Reconnect the battery and clear the DTC using an OBD-II scanner.
7. Test drive the vehicle to ensure the code does not return.

How to erase DTC P0164

To erase DTC P0164, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the ignition without starting the engine.
3. Navigate to the “Erase Codes” or “Clear DTCs” option on the scanner.
4. Confirm the action to clear the trouble codes.
5. Disconnect the scanner and start the engine to verify that the code does not reappear.