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Error Code P009C: What It Means & What To Do?

OBD Code P009C - Fuel Pressure Relief Control Circuit Low

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If you detect fuel dripping from your vehicle Tailpipe, increase fuel consumption and low engine performance, chances are that your vehicle is facing some problem with its Fuel Pressure Relief Control Circuit. Chances are that your PCM sets the OBD error code P009C.


P009C is one of the OBD-II trouble code out five possible codes that indicates this problem.

Learn More About OBD Error Code P009C

Wondering what is this error code P009C and how is it affecting your engine’s performance? This is one of the trouble codes associated with fuel pressure relief control circuit.


This code will be set by your vehicle’s powertrain control module when it detects some malfunctioning with the operation of the fuel pressure relief control circuit. PCM will set this error obd code P009C when it detects that the fuel pressure relief control circuit is open.


What causes this problem with Fuel Pressure Relief Control Circuit?


  • Fuel pump if damaged or defective can cause this problem
  • Fuel pressure relief valve if faulty can become another potential cause
  • Fuel pressure regulator failure can be another cause
  • Corroded or damaged fuel pump connector and wirings can become a common cause
  • PCM if showing issues can too become a potential cause
  • Shorted or open fuel pressure relief valve harness
  • If fuel pressure relief valve circuit has poor electrical connections, it can cause this issue

Replace/Repair These Parts To Fix OBD Code P009C

  1. Fuel Pump - Need fuel pumps to correct this issue? You can find them at best prices with us and that too for every make and model. We have in stock best priced fuel pumps from top brands.
  2. Fuel Pressure Relief Valve - Select your make/model specific fuel pressure relief valve and get this error fixed at the earliest. We have in stock best range of auto parts for you.
  3. Fuel Pressure Regulator - Fixing fuel pressure regulator will help you to correct this issue. With us you can also find a wide variety of Fuel pressure regulators from top auto brands to fix this OBD Error code P009C.
  4. Fuel Pump Wiring & Connectors - Corroded or broken wirings and connectors can cause this problem, so you might need change/replace them to get this issue corrected.
  5. PCM - Powertrain control module might also be needed to be replaced to correct this engine error code P009C.
  6. Diagnostic Tools - Search through our range of best diagnostic tools online and be ready to become that DIY guy you always wished to be.

Symptoms Of OBD Error Code P009C

Next on our list after common causes are common symptoms for this obd error code P009C with your fuel pressure relief control circuit.


Common Symptoms


  • Your engine might start showing trouble in starting
  • Inefficiency and low performance on part of your vehicle’s engine
  • Illumination of Check Engine Light (CEL)
  • Tailpipe leaking fuel
  • Sudden increase or rise in your vehicle’s fuel consumption
  • To make sure that you are actually troubled by the OBD error code P009C, you will need to conduct a complete diagnosis of the problem that we have explained in the subsequent section.

How To Correct P009C Fuel Pressure Relief Control Circuit Low

If you wish to get rid of this issue with your fuel pressure relief control circuit you will need to follow these following steps. But before this we recommend you to make sure that you are actually facing this problem.

 

  • First you will need to replacing the damaged fuel pump
  • Next, you will have to replace the defective or damaged fuel pressure relief valve
  • Also, you will need to replacing the damaged fuel pressure regulator
  • If you discover corroded connectors, you will need to clean them
  • You will have to repair or replace the damaged or broken wirings
  • If the PCM or ECU is found to be defective, you will need to replace that too
  • In order to correct this problem, if you need any of these parts you can find with us top brand auto parts. We have in stock best priced Fuel delivery system parts for all makes and models online in Canada.

Easy Diagnosis Of Engine Error OBD Code P009C

Now in order to diagnose OBD error code P009C you will need few diagnostic tools and certain things/steps to be kept in mind. Firstly, you will need to test the Technical Service Bulletins also known as TSB’s specific to your vehicle’s make and model. This will save a lot of your time and also direct you towards the right direction. Secondly, locate and check all the fuel pressure relief control circuit components such as the fuel pump, fuel pressure regulator and Powertrain control module.


Next, perform a visual inspection to check all the associated wiring and connector for any defects.


Common mistakes when diagnosing the P009C code


While conducting the diagnosis few common mistakes that you can avoid committing are listed as follows


  • There might be a fuel pressure regulator failure
  • Also, there can be a PCM failure
  • Wiring issue can also occur

Other Diagnostic Codes Related To OBD Code P009C

P009B - Fuel Pressure Relief Control Circuit/Open

P009D - Fuel Pressure Relief Control Circuit High

P009E - Fuel Pressure Relief Control Performance/Stuck Off

P009F - Fuel Pressure Relief Control Stuck On