P06BD OBD Error Code: Problem & Solutions

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In your diesel vehicle the cylinder is preheated before the engine is started, this is the job of the glow plug. IN case the Powertrain control module or the PCM module notices any issues with the glow plug for cylinder five, it will set P06BD code.

The whole glow plug system is responsible to assist in providing heat required for the combustion of engine to begin. This is even more important for vehicles functioning in cold weather conditions. This happens when the glow plugs heat before and during the cranking of the engine. It continues on during the initial operation of the engine as well. The ECM or Engine Control Module is responsible for switching the glow plug on, by monitoring need based on the coolant temperature and glow plug voltage. This glow plug voltage system is rather complex, consisting of eight individual glow plug supply circuits. These run between the glow plugs and the controller. If the ECM receives a feedback voltage from the controllers that is not within the desired range, it will proceed to set error code P06BD.

What causes this problem with the Cylinder 5 Glow Plug Circuit Range/Performance

• Malfunction in the glow plug(s)
• Open or shorted circuits visible of the glow plug control
• Loose or damaged glow plug connector
• Defectiveness in the timer of the glow plug 

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3. ECM - We stock a variety of automobile compatible parts, search for one that suits your needs and have it delivered at your doorstep.
4. PCM - Repair parts and replace those beyond repair from Parts Avatar, we offer free delivery on orders over CAD $99.
5. Glow Plug connector - Try to repair and see if that’s helped. Otherwise you can order carefree from us. We deliver to the remotest areas in Canada.
6. Exhaust System - Repair or replace any part of the system, give your vehicle the best parts possible by purchasing from us.
7. Fuel Delivery System - Check for issues and accordingly decide on repairs or replacements. Order 24/7 and have your order delivered within few working days.
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9. Cylinder - Cylinders can be repaired, but replacing them can result in a peaceful mind. You can order your today from Parts Avatar.
10. Engine Wiring - Try to fix wires, if the damage is too extensive save yourself the future stress and purchase superior quality wires from us.
11. Drive Belt - Repair and replace as per need, take advice from your mechanic if possible.

Here’s a lowdown of the common symptoms associated with P06BD error code.

Common Symptoms

• Excess of black smoke coming from exhaust
• Issues noticed in engine drivability
• Engine start up takes too much time
• Reduction in fuel efficiency
• Engine misfire codes may be stored incorrectly

Correct your OBD error and not worry about where to procure any replacement parts, as Parts Avatar is here to solve your issues stress-free! Here’s how you can correct this error;

• Replacement of the Glow Plug

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To diagnose the P06BD error code you will first need to get hold of a diagnostic scanner, a DVOM, your vehicles Technical Service Bulletins, and a reliable vehicle information source provided by the manufacturer along with diagnostic flowcharts, wiring diagrams, connector pinout charts and component locations and texting procedures/specifications. Once you have all this handy follow the diagnostics steps below:

Start with a visual inspection of the glow plus and the glow plug control wiring, connectors. Make note of any apparent damages to them and repair them accordingly or even replace if need be. Connect your scanner to the vehicles diagnostic port to retrieve all the codes stored in it. Freeze frame the data and also make note of them in order for future reference. Now you have to rule out if the code is intermittent or requires further diagnosis, for this simply take your vehicle for a test drive and wait to see if the code resets, or the PCM goes into readiness mode. If the latter happens, it means it’s an intermittent issue, and can be correctly diagnosed after the condition worsens. However, if the code is reset, continue diagnosis by testing the glow plugs.

To do this, remove them and apply battery voltage, if the glow plug glows brightly in red colour it’s in functioning capacity. But if you notice that it doesn’t heat up you will have to test it further with a DVOM and rule out if it truly doesn't meet the manufacturers resistance specifications.

This step is rather dangerous, so be careful not to burn yourself or cause a fire. If they seem to be working properly, with the help of a scanner try to activate the glow plug timer. Use the DVOM to test for battery voltage and ground at the glow plug connector. If you find that there’s no voltage found then test the power supply for the glow plug timer/ glow plug controller. All related fuses will also have to be tested, including relays as per manufacturers recommendations. When testing the system fuses and fusible links ensure that the circuit is loaded to avoid any confusion.

If you are able to conclude the fuses and relays to be functional you can proceed to using the DVOM for testing the output voltage at the glow plug timer or PCM depending on where it originates. If you are able to detect voltage, it’s surely an open or shorted circuit, fix that issue.

Sometimes it is presumed that the P06BD being a control circuit code can’t be caused by a faulty glow plug. But don't be fooled, a bad glow plug can cause disparity in the control circuit, which can result in such a code trying to diagnose issue with the incorrect cylinder. So be mindful and resolve issue with the glow plug first and be sure which cylinder you are supposed to be addressing during diagnosis.

Common mistakes when diagnosing the P06BD Code

• Glow plug control module fails to perform
• Glow plug malfunction
• Glow plug wiring harness not functional