P06BF - OBD Trouble Code

<<See All OBD Codes

The glow plug in diesel engine vehicles preheats the cylinder before the engine is started by us. The Powertrain Control Module or PCM will detect any malfunction of cylinder 7 and set code P06BF.

The glow plug system assists in providing the heat to begin combustion in cold temperatures. It holds a significant position especially for vehicles running in cold temperatures. These plugs as heated before and during the cranking. They also continue to heat during the initial stages of engine operation. These plugs are turned On by the Engine Control Module (ECM), it does so by monitoring the coolant temperature and glow plug voltage. This glow plug system has eight individual supply circuits between the controller and glow plugs. If the ECM notices that the feedback voltage from the controller is not within range, then the OBD code P06BF is set.

What causes this problem with the P06BF Cylinder 7 Glow Plug Circuit Range/Performance

• Very poor-quality glow plug(s)
• Glow plug control circuit becomes open or shorted
• Improper or faulty glow plug connector
• Defectiveness in the timer glow plug

1. Glow Plug - Buy the perfect parts from us, order online and track your shipment till it reaches you.
2. Engine Parts - Repairs may not be sufficient sometimes, but Parts Avatar can help you easily, we stock a wide range of parts compatible with several vehicles. Order today!
3. ECM - Replacing it can be a big expense, get quality assured products from us. Avail free shipping on orders over CAD $99.
4. PCM - Repair it, otherwise opt for replacement only from Parts Avatar. We ship to the remotest areas in Canada, so don’t worry and order today.
5. Glow Plug connector - Repair and replace as per need. We have superior quality products just for you.
6. Exhaust System - You can rely on Parts Avatar for getting only the finest quality replacements for your vehicle. Receive your order within days.
7. Fuel Delivery System - Needs to be working at top level, replace only with the best from Parts Avatar.
8. Ignition System - Your ignition system can be corrected by repairs, but if you have to purchase a new one, just go to our website and buy one today.
9. Cylinder - Cylinders can easily be replaced if repairing hasn’t worked. Buy online at Parts Avatar today.
10. Engine Wiring - You can buy the best wires for your vehicle from us.
11. Drive Belt - Try to repair the drive belt, otherwise get a replacement.

We at Parts Avatar have listed out few common symptoms associated with P06BF for you:

Common Symptoms

• Excess of black smoke emitted from exhaust
• Engine showing issues with drivability
• Reduction in fuel efficiency
• Engine misfire codes are being set

It is fairly easy to correct this code if you have the right information, here is one simple way

• Replacement of Glow Plug

You can find a large variety of products on our website including Glow Plug, Drive Belt, Wiring, Exhaust System and many more. Now all your problems would vanish within no time.

Here are some steps which you should follow in order to diagnose this P06BF fault code:

Procure a diagnostic scanner and DVOM as your tools for the diagnosis. You will need information sources too, these include a reliable vehicle information source, the applicable technical service bulletins (TSB). From them retrieve all the diagnostic flowcharts, wiring diagrams, connector face views, connector pinout charts, component locations, and component testing procedures/specifications.

Next, start your visual inspection of the glow plug and glow plug control wiring and connectors. Find your vehicle's diagnostic port and connect the scanner to retrieve all codes stored and freeze frame the data. Make note of them also, and ensure they’re in order. Now take your car on a test-drive. Keep driving till either one happens; the code is reset, or the PCM enters readiness mode. In case of the latter, it will be confirmation that the code is intermittent and the issue will have to unfortunately worsen before correct diagnosis can be made. If the former happens continue on with diagnosis. Tests the glow plugs by applying battery voltage, if it glows bright red then it’s fine. If it doesn’t heat up, use the DVOM to test it to see if it meets the manufacturers specifications for resistance. Ensure full safety while doing this, you may burn yourself or even cause a fire.

If the glow plug is working correctly use the scanner to activate the glow plug timer, and with the help of DVOM test for battery voltage and ground at the glow plug connector. Upon your findings of no voltage presence you will have to test the power supply for the glow plug timer or glow plug controller. Proceed to testing all related fuses and relays, as per manufacturer recommendations. Test them with the circuit loaded. If you’re able to successfully conclude that all relays and fuses and functioning as required then use the DVOM to test output voltage at the glow plug timer or PCM (depending on where it originates from). suspect an open or shorted circuit if voltage is present, and accordingly resolve the issue. There is a misconception that P06BF can’t be caused by a faulty glow plug, be assured that that is completely false. A malfunctioning glow plug may cause variation in the control circuit, which results in attempting to diagnose the wrong cylinder. It is crucial you know the correct faulty cylinder for diagnosis to be successful.

Common mistakes when diagnosing the P06BF Code

• Glow plug control module has stopped to perform
• Glow plug has failed
• Glow plug wiring harness fails to work