P02F6 - OBD Trouble Code

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The OBD code P02F6 can be described as Cylinder 9 Injector Circuit Range/Performance. There are special transistors known as “drivers” in the engine control module to turn the fuel injectors on and off in the fuel injection system. If the powertrain control module would not be able to control the fuel injector for cylinder number three, then it would start triggering the P02F6 fault code.

When the conditions are normal, then the engine control module would turn the fuel injectors ON as well as OFF in the fuel injection system. It is the engine control module which would set this trouble code when it would detect that the fuel injector is not working as it is designed.

This diagnostic fault code is a generic powertrain code, which means that it would apply to the OBD-II equipped vehicles. The specific repair steps can vary as it depends upon the vehicle make and model.

What causes this problem with the Cylinder 9 Injector Circuit Range/Performance?

• Some faults in the fuel injector 9
• The fuel injector 9 can be dirty
• The fuel injector 9 can be plugged
• The harness of fuel injector 9 might be opened or shorted
• Bad electrical connection in the fuel injector 9
• The engine control module might be malfunctioning

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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 P02F6. They are mentioned here as follows:

Common Symptoms

• Illumination in the service engine soon warning light
• Decrease in the overall engine performance
• There can be an increase in the fuel consumption

If you wish to correct this fault code, then you have to follow certain steps. Correcting a problem needs your careful attention. Here are some ways with the help of which you will be able to correct the OBD Code P02F6:

• It is very important to check the boost pressure sensor
• The defects in the turbocharger/supercharger, should be definitely replaced
• The knock sensor should be repaired or replaced
• The defective spark plug should be repaired or replaced
• The faulty engine control module should be replaced

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Here are some steps which you should follow in order to diagnose this fault code:

This serious issue can arise because of either a loose or corroded electrical connector on the injector, a fouled injector which can be dirty or plugged or a bad injector needing replacement. It is the loose or corroded connectors which are the cause of the electrical fault. There are a few cases where low voltage wiring can become shorted or open. The majority of electrical problems can be alternator related, starter solenoid wiring, oxygen sensor wiring due to the close proximity to the exhaust and battery related. The majority of electrical work connects customer-installed items such as high-power stereos and other parts or equipment installed incorrectly.

The connector on the fuel injector should be checked properly. It is a plastic connector secured to the injector with a wire clip around the connector. Pull on the connector to see if it comes off easily. Then you must remove the wire clip and pull the connector off the injector. The harness connector should be inspected for corrosion or pushed out pins. Make sure the two blades are not bent in the injector itself. Correct any defect and apply dielectric grease and install the electrical connector. Then you must start the car engine and listen to the injector to ensure it is working. Use a long screwdriver to the injector and the handle to your ear and you can hear it clearly. If it isn't making a highly audible 'clicking' noise, it either has no electrical power to it or it has failed.

If it is not clicking, pull the connector off the injector and check for power with a voltmeter. If there is no power, then it would mean the wiring to the fuel pump relay is at fault or has a loose connection. If it has power, probe both terminals on the harness connector and if the PCM injector driver is operating, the voltmeter will indicate rapid pulses. If you notice the pulses, then you must replace the injector. If the injector was operating, then it is either clogged or dirty. First of all, you must clean it. The kit to flush the injectors is inexpensive and will benefit the remaining injectors, possibly preventing a recurrence. If the flushing fails to solve the problem, then there is a need to replace the injector.

Common Mistakes When Diagnosing The P02F6 Code

• The fuel injection control module might start failing
• There can be a failure in the fuel injector
• Some wiring issues