P0063 - OBD Trouble Code

<<See All OBD Codes

Decreased engine performance and fuel mileage, hard starting, black smoke from the exhaust pipe and Check Engine Light On are some of the indicatives of the OBD Code P0063 being stored in the PCM.

P0062 indicates that the heater element used to heat up an oxygen sensor has malfunctioned.

Heated Oxygen sensors (HO2S) are inputs used by the PCM (Powertrain Control Module) to determine oxygen content in the exhaust system. Bank 2, sensor 3 refers to the third sensor back on Bank 2. The PCM uses the information gained from the Bank 2, 3 HO2S mainly to monitor the efficiency of the catalytic converter. Integral to this sensor is a heater element

Low amount of voltage signal sent from the oxygen sensor to the PCM causes this code to flash. The PCM sends a voltage to the heater circuit of the oxygen sensor to warm it up to a desirable temperature and the sensor emits a certain resistance and voltage according to the amounts of gasses and air that the sensor is picking up. The PCM takes the readings of the oxygen sensor to ensure the desirable air-fuel ratio of the engine. If the voltage sent by the oxygen sensor is lower than that of the PCM’s desired range, code P0063 is set.

What causes the problem of HO2S Heater Control Circuit Low (Bank 2 Sensor 3)?

• Heated Oxygen Sensor faulty
• Frayed Harness of Heated Oxygen Sensor Bank 2 Sensor 3 is open shorted
• Engine Control Module (ECM) faulty
• Oxygen sensor circuit blown fuse
• Burnt wiring and connectors to the sensor and circuit
• Heater element high resistance or voltage consumption
• Failed PCM Oxygen sensor heater
• Damaged heated oxygen sensor

1. Oxygen Sensor - A faulty sensor will transmit wrong information to the PCM and will affect the overall engine performance. Replace faulty sensor now!
2. Oxygen Sensor Connector - A faulty Oxygen Sensor Connector will not be able to read the composition of air entering out the engine combustion system and hamper performance. Thus, replace faulty connectors now!
3. Oxygen Sensor Fuse - Heater Circuit Fuse can be damaged and can affect the oxygen sensor functions. Visit us for quality fuses and parts.
4. Diagnostic Tool - Always make use of a professional diagnostic tools to diagnose the problem. Buy quality diagnostic tools now!
5. Powertrain Control Module - P0063 error code also relates to problems with the powertrain which can store and flash wrong error code. Find all the Powertrain related parts with us.

The P0063 code will produce a Check Engine Light on the instrument panel/dash and will likely affect:

• Check Engine Light illumination
• Vehicle struggles in idle or hesitate to accelerate
• Impacted Engine Performance and reduced Fuel Mileage
• Engine Hard Starting
• Black smoke visible from the tailpipe
• A lean or rich engine condition
• Decreased fuel economy

Following checks and steps are necessary to correct the OBD code P0063;

• Use scan tool to check for the existence of the OBD Code
• Examine vacuum leaks and holes in the exhaust system
• Remove/replace the faulty oxygen sensors
• Check electrical wiring and connectors
• Examine Oxygen Sensor for proper functioning
• Clear the error code and re-test the car for error

At Parts Avatar Canada, find the best quality replacement parts  at the best price in the market to correctly diagnose the OBD Code P0063 error.

With the help of a professional mechanic, inspect all the components related to this error and follow the step by step diagnosis and carefully analyse the situation to diagnose this problem.

• Visually inspect Bank 2, Sensor and wiring/harness and repair/replace as needed. Make sure wiring is routed away from exhaust.
• Next, unplug the Bank 2, Sensor 3 HO2S and verify that there is 12 volts B+ present with the key on engine off, or ground is present, depending on the system.
• Unplug the connector from the oxygen sensor you want to test. Refer to your vehicle’s repair manual for the locations of the HT and +B connections. If the DVOM reads OL the oxygen sensor is bad and needs to be replaced.
• Clear all codes and test drive the vehicle to see if the code returns. In the unlikely event that the code does return, there may be an intermittent fault present.
• Check for PCM failure and repair or reprogram is as per the requirement to fix the error and test again.

Common Mistakes When Diagnosing The P0063 Code

Check of faulty wiring and connectors first. Avoid jumping straight to ECU for problems and it will give faulty test results. Follow the step by step diagnosis process at all times keeping in mind the specific make and model.

• Not examining for blown fuses
• Replacing the sensor without examining the electricals and connectors
• Replacing the oxygen sensor without measuring resistance and voltage.