Guide To P06C6 OBD Error Code Solutions

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The Glow Plug is utilized on diesel engines to preheat the cylinder before the engine is started. Now if the engine control module would detect the glow plug for cylinder two is not functioning properly, then the P06C6 would start appearing.

The error code P06C6 can be defined as Cylinder 2 Glow Plug Incorrect.

Willing to learn something more about this fault code?

The heat which is required to start the combustion during cold engine temperatures is provided by the glow plug system. The glow plugs are heated before and during cranking, as well as initial engine operation. The engine control module would control the glow plug ON times by monitoring coolant temperature and glow plug voltage.

There are has eight individual glow plug supply circuits in the glow plug system between the controller and the glow plugs. Now if the feedback voltage from the controller to the ECM would not be within the specified range, then the P06C6 trouble code would be set by the engine control module.

What causes this problem with the Cylinder 2 Glow Plug Incorrect?

• There can be opened or shorted glow plug control circuit
• The glow plug connector might be loose or faulty
• Some faults in the glow plug
• Quirks in the glow plug timer

1. Powertrain Control Module - OBD Code P06C6 can appear because of faulty Powertrain Control Module.
2. Glow Plug Connector - There can be some issues with the Glow Plug Connector due to which you may see P06C6 code appearing over and over again. Visit us to buy best quality Glow Plug Connector online.
3. Engine Wiring Harness - Are you facing some faults in your Engine Wiring Harness? Don’t worry and get them replaced or else P06C6 code can turn up.
4. Engine Control Module - Common cause behind this P06C6 error code can be some fault in Engine Control Module. So, it will be a good decision to replace them now.
5. Body Control Module Component - Engine Control Module is perfectly fine but still but having that trouble code P06C6 flashing? In such a situation your Body Control Module Component might be faulty. Why don’t you think of getting that replaced?
6. Electronic Control Unit - The P06C6 code can also arise due to some issues in Electronic Control Unit. So, it is advised to replace them as soon as possible.

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 P06C6 here:

Common Symptoms

• Engine start up can start delaying
• Reduction in the overall fuel efficiency
• Intemperate black smoke from exhaust
• Some issues related to engine drivability
• Engine misfire codes may be stored

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 P06C6:

• It is essential to replace the glow plug connector
• Replace the quirky glow plug
• Make sure to repair or replace the opened or shorted glow plug control circuit
• The faulty glow plug timer should be restored

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If you want to easily diagnose this trouble code, then you must follow the steps which are mentioned here as below:

The technician can use a diagnostic scanner, a reliable source of vehicle information, and a digital volt/ohmmeter (DVOM) in order to arrive at an accurate diagnosis of a code P06C6. Use the vehicle information source to search for applicable technical service bulletins (TSB). If you locate a TSB that matches the vehicle make and model, symptoms exhibited, and the code stored, it will help you to arrive at a diagnosis. You may also need to obtain diagnostic flow charts, wiring diagrams, connector face views, connector pinout charts, component locations, and component testing procedures/specifications from the vehicle information source.

All this information will be needed to correctly diagnose the stored code P06C6. Now once you have performed a careful visual inspection of all glow plug and glow plug control wiring and connectors, connect the diagnostic scanner to the vehicle diagnostic port. Then retrieve all stored codes and freeze frame data and record it for later.

After that test drive the vehicle to see if the code P06C6 is reset. Drive until one of two things happens: Either the PCM enters readiness mode or the code is reset. If the code is reset, continue with the diagnosis. If it is not, you are dealing with an intermittent condition which may have to worsen before an accurate diagnosis may be achieved. Here is a tip that the service manual will not give you.

The best way to test glow plugs is to remove them and apply battery voltage. If the glow plug glows bright red, it is good. If the glow fails to heat up, and you want to take time to test it with your DVOM, you will likely discover that it does not meet manufacturer's specifications for resistance. Be careful not to burn yourself or start a fire when performing this test. If the glow plugs appear to be working properly, use the scanner to activate the glow plug timer and test for battery voltage and a ground at the glow plug connector.

If no voltage is present, test the power supply for the glow plug timer or glow plug controller. Test all related fuses and relays as recommended by the manufacturer. As a rule, it best to test system fuses and fusible links with the circuit loaded. The fuse for a circuit which is not loaded may appear to be functional (when it is not) and lead you down the wrong diagnostic path. If all fuses and relays appear functional, use the DVOM to test output voltage at the glow plug timer or PCM (wherever it originates). If voltage is detected at the glow plug timer or PCM, suspect that you have an open or shorted circuit. You may seek out the cause of the discrepancy or simply replace the circuit.

Common Mistakes When Diagnosing The P06C6 Code

• Failure in the glow plug control module
• Glow plug might be defective
• Flaws in the glow plug wiring harness
• Many a times it is thought that a P06C6 cannot be caused by a defective glow plug because this is a control circuit code. Don't be deceived; a bad glow plug may cause a variation in the control circuit that results in just such a code. A lot of people make a big mistake of attempting to diagnose the wrong cylinder. Save yourself a big headache and make sure that you are addressing the correct cylinder before beginning your diagnosis.