P018A OBD Error Code: Problem & Solutions

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The OBD error code P018A is a generic code which can be defined as “Fuel pressure sensor B – Circuit Malfunction”. This trouble code starts appearing if the powertrain control module has detected some abnormal signal voltage from the fuel pressure sensor.

Do you want to know what the meaning of letter “B” in this definition? The letter “B” refers to the signal voltage circuit as opposed to the input circuit voltage. And the “circuit malfunction” means that there is a malfunction in the control circuit as opposed to a fault in a sensor or some other component.

What causes this problem with the Fuel Pressure Sensor ‘B’ Circuit?

• Default in the fuel pressure sensor 'B'
• The harness of the fuel pressure sensor 'B' can be opened or shorted
• Bad electrical connection with the fuel Pressure Sensor 'B' circuit

1. Powertrain Control Module - OBD Code P018A can flash if the Powertrain Control Module is damaged. You must replace it with a brand new one online with us.
2. Fuel Rail Pressure Sensor - Is your PCM perfectly correct, but still seeing P018A code? Then there is definitely some issue with the Fuel Rail Pressure Sensor.
3. Fuel Pressure Sensor - Did your mechanic just found out that there is some fault in the Fuel Pressure Sensor? Buy top notch Fuel Pressure Sensor from us at economical prices.
4. Fuel Pump - Everything is fine with the engine control module and still OBD code P018A flashing? Then there is definitely some fault with the Fuel Pump. Get it checked and replaced if needed.

We care for our customers and that’s why we can totally understand your problem. That’s the reason why we have listed out some major symptoms behind the flashing up of OBD Code P018A. They are mentioned here as follows:

Common Symptoms

• The check engine light may start illuminating
• The car engine may become too hard to start or does not start at all
• There can be poor engine performance

Here are some ways with the help of which P018A code can be addressed:

• The fuel pump should be replaced

However, if you face any issues then visit us as we have great range of best priced oil pressure sensor, shift solenoid, electronic control module and a lot more to help you out in fixing your car with ease.

If you find out that the fuel pressure sensor is appearing functional as it is all based on its internal resistance, even then you should not assume that will actually work properly throughout its operating range. The only way with which you can be sure that the sensor works as intended, is by connecting the scanner to the vehicle and then you must set it so that it can monitor the live data from the pressure sensor. Now you must start the car engine, but bear in mind that if the engine is running at a steady RPM, the signal voltage generated by the sensor should remain fairly constant.

A momentary drop would be caused by raising the speed of the engine sharply in the fuel rail, and this change caused in the pressure should be reflected immediately in the display of the scanner. In the same way the decreasing of the engine speed would raise the fuel pressure and its change would also be reflected on the scanner. The change would be reflected in the form of a changing signal voltage in both the cases.

Now if the change turns out to be slow, erratic or if you find out that there is no change in the signal voltage, then the signal wire to the powertrain control module must be defective. If this is suspected, then you must prepare to perform resistance, continuity as well as ground circuit checks on all the wiring. Just remember to disconnect the wiring from the powertrain control module so that no damage is caused to the controller.

Common Mistakes When Diagnosing the P018A Code

• There can be some defects in the powertrain control module
• Some failure in the pressure sensor
• The issue of wiring may arise