Error Code P0152: What It Means & What To Do?

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The P0152 fault code can be defined as an oxygen sensor circuit high voltage bank 2 sensor 1. This fault code occurs when there is excessively high voltage from the sensor sent to the powertrain control module.

It is a generic trouble code which means that it applies to all the vehicles which are equipped with OBD-II.

The main role of the oxygen sensor is to measure the oxygen content in the exhaust. That data would then be used by the powertrain control module to regulate the pulse of the fuel injector. The oxygen sensor plays a very important role for proper operation of the car engine. If there is any issue with it, then it can cause the powertrain control module to add or take away large amount of fuel as it won’t be able to receive the right information from the oxygen sensor voltage.

What causes this problem with the O2 Sensor Circuit High Voltage (Bank 2 Sensor 1)?

• There can be some defects in the oxygen Sensor
• Faults in the oxygen sensor wiring or connections
• There can be an issue of shorted oxygen sensor heater elements

1. Exhaust Parts - There can be some issues with the Exhaust Parts due to which you may see P0152 code appearing over and over again. Visit us to buy best quality Exhaust Parts online.
2. Engine Control Module - A lot of issues can arise do to defective Engine Control Module. Did you just see P0152 code flashing? Now you know the reason why it is appearing. Get it inspected and replaced on time.
3. Fuel Delivery System Parts - Faulty Fuel Delivery can be the reason why P0152 code is flashing. Visit us to purchase top notch Fuel Delivery System Parts online.
4. Fuel Injector - It is an important auto part which needs full care. A faulty Fuel Injector can be a reason behind the flashing up of P0152 code.
5. Powertrain Control Module - OBD Code P0152 can appear because of faulty Powertrain Control Module.
6. Engine Parts - There can be some issues with the car Engine Parts due to which you may see P0152 code appearing over and over again. Visit us to buy best quality Engine Parts online.
7. Oxygen Sensor - Are you facing some faults in your Oxygen Sensor? Don’t worry and get them replaced or else P0152 code can turn up
8. Air/Fuel Sensor - P0152 code does not really end up spoiling your PCM, but it might also accompany few Air/Fuel Sensor issues. We have best Air/Fuel Sensor with us.
9. Exhaust Pipe - Defective car Exhaust Pipe can be a major reason why P0152 code depicts. So, make sure to replace it online so that you don’t have to face any further issues.

It is essential to know the symptoms of an issue as only then you would be able to solve the problem. So that’s why we have listed out some major symptoms of OBD Code P0152 here:

Common Symptoms

• There can be an illumination in the malfunction indicator lamp
• The car engine can start running very roughly
• The engine may be running lean or rich as it would depend on if the oxygen sensor is reading correctly or incorrectly
• There can be an issue of lack of power
• There might be an overall increase in the fuel consumption

Learn the ways with which you can correct this trouble code:

• Make sure that you replace the oxygen sensor when the problem is faulty oxygen sensor wiring or connections
• The car oxygen sensor should be replaced when the problem is an over-reporting mass air flow sensor

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• Make sure that your car engine is functioning properly; this can be done by providing an air fuel mixture of 14:7. The fuel delivery, ignition timing, and fuel injector pulse are controlled with the help of powertrain control module. The input signals are gathered by the powertrain control module from various engine drivability sensors to calculate the fuel delivery strategy
• One of the most important of these sensors is the Heated Oxygen Sensor or the Air/Fuel Sensor. The oxygen levels in the exhaust system are detected with its help. This data informs the powertrain control module of how rich/lean the engine is running. The “heater” portion of the oxygen sensor is an electrical circuit that is dedicated exclusively to warming up the oxygen sensors. In OBD-II equipped vehicles, most oxygen sensors are of the heated variety
• Every heated oxygen sensor has its own integrated heater. Electrical voltage is used to heat the oxygen sensor, the powertrain control module is permitting it to become operational sooner than if it was heated using only exhaust gases. Due to this, the emissions would decrease and the time needed for the powertrain control module to enter closed loop mode. A battery voltage is used by most heated oxygen sensors
• There are some models where the voltage is delivered via a fused circuit. The heated oxygen sensor circuit is completed with a ground supplied by the PCM. A computer-controlled supply is used by other manufacturers of battery voltage and a continuous ground
• If the powertrain control module detects a fault in heater system circuit voltage (or resistance) a code will be set and a service engine soon lamp may be illuminated. Several tools will be instrumental in successfully diagnosing this code. If you want to perform a successful diagnosis, then you must use an OBD-II scanner and a digital volt/ohmmeter

Common Mistakes When Diagnosing The P0152 Code

If you want to prevent misdiagnosis, then you must follow these steps:

• You must compare the bank 1 and bank 2 oxygen sensor to check the engine overall running conditions to see if the high voltage is common for both banks indicating a fuel injection issue or not an O2 sensor problem
• The next thing to be kept in mind is to check the oxygen sensor for oil or coolant contaminants that can lead to shorting and repair any leaks first before replacing the oxygen sensor

P0132 - O2 Sensor Circuit High Voltage (Bank 1 Sensor 1)

P0138 - O2 Sensor Circuit High Voltage (Bank 1 Sensor 2)

P0144 - O2 Sensor Circuit High Voltage (Bank 1 Sensor 3)

P0164 - O2 Sensor Circuit High Voltage (Bank 2 Sensor 3)

P0158 - O2 Sensor Circuit High Voltage (Bank 2 Sensor 2)