P02C9 - OBD Trouble Code

<<See All OBD Codes

The fault code P02C9 can be defined as cylinder 12 injector leaking. Did your mechanic just tell you that there are some faults in the fuel injector? Leaking engine vacuum? Some defects in the oxygen sensor? These are some causes due to which the P02C9 trouble code can start appearing.

Do you want to know more about the P02C9 fault code? Then you have arrived at the correct place. We are here to provide you with best information.

The engine control module would use a fuel pressure sensor to determine the amount of fuel pressure which is present in the fuel rail. If the fuel pressure does not change the way the powertrain control module thinks it should, then the P02C9 fault code would be set.

What causes this problem with the Cylinder 12 Injector Leaking?

• Some defects in the fuel injector
• Programming error in the powertrain control module
• The fuel injector circuit might be opened or shorted
• Some defects in the oxygen sensor
• Mass air flow or manifold air pressure sensor failure

1. Fuel Injector - Faulty Fuel Injector can be the reason why P02C9 code is flashing. Visit us to purchase top notch Fuel Injector online.
2. Fuel Pump - It is an important auto part which needs full care. A faulty Fuel Pump can be a reason behind the flashing up of P02C9 code.
3. Oxygen Sensor - OBD Code P02C9 can appear because of faulty Oxygen Sensor.
4. Manifold Air Pressure (MAP) sensor - There can be some issues with the Manifold Air Pressure (MAP) sensor due to which you may see P02C9 code appearing over and over again. Visit us to buy best quality Manifold Air Pressure (MAP) sensor online.
5. Powertrain Control Module - Are you facing some faults in your Powertrain Control Module? Don’t worry and get them replaced or else P02C9 code can turn up.

You might be thinking that how would you diagnose these problems? We at Parts Avatar Canada would help you diagnose the major symptoms easily.

Common Symptoms

• The engine performance might start decreasing
• The fuel efficiency can start reducing
• There can be delayed engine start up
• The presence of stored rich exhaust codes
• Misfire codes can also get stored

Here are some ways which would help you to correct the occurrence of OBD Code P02C9. They are mentioned here as follows:

• Make sure that you replace the damaged fuel injector

There is no need to get strained if your OBD Code is still flashing up as we are here at your service. Have a look at our superior variety of 02 sensor, spark plug, Crankshaft sensor, Injection pump, Air fuel ratio sensor and many more. Now all your problems would vanish within no time.

You can always diagnose the codes which are related to MAF and MAP and properly repaired before attempting to diagnose a code P02C9. You must begin your diagnosis with a general inspection of the fuel injection rail area. You must carefully inspect the outside for signs of corrosion and leakage. If there is heavy corrosion on the exterior of the fuel injector, or if it is leaking, suspect that it has failed.

If you find out that there are no obvious mechanical issues in the engine bay, there are several tools that will be required for an accurate diagnosis:

• A digital volt/ohmmeter
• A diagnostic scanner
• An automotive stethoscope
• A reliable vehicle information source

After that you should connect the scanner to the vehicle diagnostic port and retrieve all stored codes and freeze frame data. It would be very helpful as the diagnosis would start unfolding. Then clear the codes and test-drive the vehicle to see if the P02C9 is reset.

If the fault code P02C9 immediately returns, use the scanner to perform an injector balance test to verify that the misfire is an injector problem. Once you have done so, then you should proceed to step 1. Now when the car engine is running, use the stethoscope to audibly monitor the fuel injector in question. An audible clicking sound should be heard and repeated in pattern. If the sound is not present, at all, then you should proceed to step 2.

If it is strained or intermittent, suspect that the injector for cylinder #12 has failed or is clogged. You should compare the sounds from that cylinder injector to others for comparison, if required.

After that you should use the DVOM to test for voltage and a ground pulse, when the engine is running. Most manufacturers utilize a system of constant battery voltage on one terminal of the fuel injector and a ground pulse applied to the other terminal at the appropriate time.

If you find out that there is no voltage at the connector of the fuel injector in question, use the DVOM to test system fuses and relays. The fuses should be replaced and relays as needed.

The fuses with the circuit under a load should be tested. A defective fuse that seems good when the circuit is not loaded may fail with the circuit loaded.

Now if all system fuses and as well as relays are in good working condition and there is no voltage present, then you should use your vehicle information source to trace the circuit back to the ignition switch or fuel injection module.

Common Mistakes When Diagnosing The P02C9 Code

• There can be some failure in the fuel injector
• You might experience the powertrain control module failing
• There can be some issues related to wiring