What Is the P06B8 Code?
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The P06B8 code definition indicates that there’s a problem with the Non-Volatile Random Access Memory (NVRAM) within your vehicle’s Powertrain Control Module (PCM) or Engine Control Module (ECM). Without the NVRAM, your vehicle may be unable to store permanent Diagnostic Trouble Codes (DTC) in its memory. This can negatively impact your ability to know when there are serious problems with other control modules, such as the Transmission Control Module (TCM) or Traction Control Module (TCSM). Your PCM or ECM may also be unable to accurately identify the information from controller self-tests, including output signals, ground locations, and more.
More About Error Code P06B8
Within any vehicle, there are multiple types of memory. Some of that memory is wiped when no power is applied to the vehicle, which happens when you turn the car off. However, some of that memory is retained even with no power. This is the NVRAM input, which processes some critical information that the vehicle must always retain, even after you turn off the vehicle. If there’s an error with the NVRAM, your PCM or ECM might be unable to keep information after your vehicle turns off.
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What Are the Symptoms of a P06B8 Code?
The main major symptom of the P06B8 fault code is that the check engine light will turn on, as well as other additional warning lights that your vehicle might have. If there’s a problem with the electrical circuit, you might see unconnected lights, like the airbag light or engine alarm lights, turn on. Issues with the PCM circuit may result in power supply codes and concerns with other individual modules within your vehicle. If there are no other error codes that you’re dealing with, you may not see any other symptoms aside from that. The only other common symptom is general drivability issues. The NVRAM is an important part of any settings a reliable vehicle maintains when you turn it off, so you may need to set those settings again every time you drive.
What Are Some Causes of a P06B8 Code?
There are a few possible causes of the P06B8 code. First, there might be an error within the PCM. Sometimes this has to do with a faulty Powertrain Control Module or other faulty control modules, while other times, it might have to do with a PCM programming error or wiring issues. Low battery voltage can also cause the P06B8 code. Open or shorted circuits or connectors in the Controller Area Network (CAN) harness or PCM harness connector can also lead to this code.
How Serious Is the P06B8 Code?
The P06B8 code should generally be considered severe. While the code may not result in drivability concerns right now, it can easily create severe problems throughout the vehicle. Memory degradation can cause it to lose track of important processes. Additionally, if there are any other severe error codes that the vehicle needs to log, it may be unable to maintain that information. You should assume that the P06B8 code is very severe and treat it as such.
Can I Still Drive with a P06B8 Code?
The P06B8 code is not a code you should continue driving with. Even if you aren’t currently seeing any issues with drivability, it’s still a good idea to avoid driving with the code, as there may be other problems you don’t see on the scan code. The more you drive, the more likely you will encounter a serious problem. Once you know this code has turned up, avoid driving your vehicle until you can get help with the code from a qualified source.
How Easy Is It to Diagnose a P06B8 Code?
The P06B8 trouble code is generally difficult to diagnose. Problems that have to do with memory inside your PCM can be exceptionally difficult to understand, as this is a process that is entirely about the vehicle’s onboard computer. If you don’t know much about how computers work, and especially about how onboard vehicle computers work, you may be at a loss for how to identify the underlying problem. A visual inspection often isn’t enough to deal with control module processor codes, but assuming the problem is a defective controller can lead to extended diagnosis time. This is an important code to talk to a professional technician about so you don’t make a common mistake for your engine type and accidentally extend the issue.
How Difficult Is It to Inspect a P06B8 Code?
As with diagnosis, inspection for the P06B8 code can be extremely difficult. You need to understand the vehicle’s PCM and what a malfunctioning PCM might look like. Most DIYers don’t have the tools to identify and debug problematic PCM programming. You also might not have the information you need to ensure that the problem lies with the PCM software rather than a wiring harness concern or something similar. If you don’t know how to run preliminary tests, identify a controller programming error, what vehicle information source to use, have access to diagnostic flow charts for this problem, and how to handle reprogramming equipment, talk to an expert for help.
Need Additional Help with Your P06B8 Code?
Most people will need help with the P06B8 code. If you’re one of those people, there’s no reason to be alarmed. Many experts will be happy to help you fix your vehicle’s underlying problem and help you get back on the road.
To start, you should find an auto repair shop in your area. The closer the automobile repair shop, the easier it will be for you to get your vehicle there, which is important for a code that can be as severe as the P06B8 code.
Additionally, the P06B8 code sometimes comes with other diagnostic trouble codes. Start with the OBD-II database at KBB.com, which will give you insight into the definition of these codes and what you should know about solving them.
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