Jump to content

2019 sierra AT4 P062f-00

Fowler
 Share

Recommended Posts

Fowler Enthusiast

Fowler

Posted
Posted

I have a 2019 Sierra AT4 with a 5.3 engine. After experiencing a ground failure and replacing that along with a new battery, I found that I was left without 4WD. I scanned the system, but it didn’t show a TCCM (Transfer Case Control Module), so I thought it might be due to my cheap scanner. I upgraded to a new scanner, but it still didn't show the TCCM. However, when I unplugged the fuse for the TCCM and reinstalled it, I scanned again, and now it shows the TCCM with the code P062F-00.

My question is: Is there something I can try to get the 4WD working again, or am I looking at needing a new TCCM or addressing something else entirely? I tried clearing the code, but it keeps coming back. All the other codes cleared except for one related to the battery for the key fob, which persists after I installed new batteries. Additionally, the left-side camera has failed, but getting the 4WD back up and running is my main priority.

2019_GMC_Sierra_1GTP9EED0KZ160844_Report_2025-08-27 0452.pdf

davester Senior Enthusiast

davester

Posted
Posted

Well, you might go through the diagnostic procedure for that code, to find what is causing it.  The TCCM might need to be replaced, but it might just have a bad power or ground connection, or something else causing it.

 

alldata.com will have a vehicle-specific diagnostic procedure you can work through, to find the cause, to then fix it.

Tom73 Enthusiast

Tom73

Posted
Posted

Here is some general info found online. May be somewhat helpful. 
_____________________________
 

What Does the P062F Code Mean?

The P062F code specifically refers to a failure within the PCM’s internal EEPROM (Electrically Erasable Programmable Read-Only Memory). This memory is crucial for storing data and configurations that allow the PCM to manage the engine and other components effectively.

What Causes the P062F Code?

Several factors can trigger the P062F code, including:

  • Control module failure
  • Powertrain Control Module (PCM) failure
  • Wiring issues that affect communication to and from the PCM

What Are the Symptoms of the P062F Code?

When the P062F code is present, you may notice the following symptoms:

 
  • Illumination of additional warning lights on the instrument cluster
  • Potential performance issues related to engine management
  • Unresponsive vehicle systems controlled by the PCM

How Serious Is the P062F Code?

The P062F code is classified as urgent, indicating that immediate attention is necessary. Ignoring this code can lead to significant damage to the vehicle’s systems and may pose safety risks to the driver and passengers.

How to Diagnose the P062F Code

To accurately diagnose the P062F code, follow these steps:

  1. Use an OBD-II scanner to confirm the presence of the P062F code and check for any accompanying codes.
  2. Inspect the wiring and connectors related to the PCM for any signs of damage or corrosion.
  3. Perform a visual inspection of the PCM itself for any physical damage.
  4. Check the vehicle’s battery and charging system, as electrical issues can affect the PCM’s performance.
  5. Consider running a PCM self-diagnosis test if available.

Common Repairs for the P062F Code

Repairing the P062F code may involve:

  • Replacing the faulty PCM
  • Repairing or replacing damaged wiring and connectors
  • Resetting the PCM and reprogramming if necessary

How Much Does It Cost to Fix the P062F Code?

The cost to fix the P062F code can vary widely depending on the specific issue and whether you need to replace the PCM. On average, you can expect to pay:

  • PCM replacement: $800 – $2,500
  • Wiring repairs: $100 – $500

Can I Fix the P062F Code Myself?

While some aspects of diagnosing and repairing the P062F code can be tackled by experienced DIYers, such as inspecting wiring and connectors, replacing the PCM typically requires specialized knowledge and tools. For most vehicle owners, it is advisable to consult with a professional mechanic to ensure proper diagnosis and repair.

Fowler Enthusiast

Fowler

Posted
  • Author
Posted

I was reading about this on Google the other day, and my situation is that there is no engine light on and I have no issues other than the fact that my four-wheel drive (4WD) isn't working. Everything else is functioning perfectly. 

This problem started after I had a bad ground issue, which led to a no-start condition. I found and replaced the faulty ground, but now I can't engage the 4WD. Initially, the Transmission Control Module (TCCM) wasn't showing up until I pulled out the fuse and reinstalled it. Now, I have a long-term memory issue, and the code is showing up under my TCCM module. I'm not sure if the problem might be related to the Transmission Control Module (TCM).

Fowler Enthusiast

Fowler

Posted
  • Author
Posted

i was talking with a guy to day he said that the transfer case motor is a big problem with them so gonna throw a rock in the dark and hope it works

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Latest Articles

  • Posts

    • Aimatdeer
      Ac not keeping up

      By Aimatdeer · Posted

      Monday looks like a good day for the dealer to test an ac issue. Hopefully it all turns out good.
    • CamGTP
      Gas Prices

      By CamGTP · Posted

      Paid $2.72 for E85 today.
    • Atlas
      Gas Prices

      By Atlas · Posted

      Welcome back! No, it definitely doesn't pass the sniff test. Even "ceasefire" needs an alternative definition these days.    $5.29 at Kroger today
    • bluev8
      Intermittent no-code issues on 2022.5+ V8 trucks — what did the shop fail to capture?

      By bluev8 · Posted

      That makes sense, and I think you are describing the real product problem. Capturing data is the easy part. If the owner or technician has to manually dig through five minutes of millisecond-level logs, the product has already failed. The device would be at the ECM harness, not at the OBD port, so I agree that data retrieval and event marking need to be thought through carefully. The way I am thinking about the architecture is: The recorder itself should not depend on a phone, app, Bluetooth, Wi-Fi, or cloud connection to capture the event. It should always keep a local rolling buffer and lock the event locally. A button, phone app, or small cabin device would only act as an event marker. If the driver feels a stumble and presses the button 10–30 seconds later, the pre-buffer has to already contain the useful data. For data retrieval, the practical options would be a sealed service USB lead, Wi-Fi download, or a phone/cabin companion device. I would not expect the owner to remove the ECM-side module or work with raw files directly. The cloud or AI side would be for interpretation, not for capturing the event. The truck may have no connection when the issue happens, so the evidence has to be saved locally first. After that, cloud processing could help decode the data, compare it against baselines, and generate a readable report. For the first version, I would keep the automatic triggers conservative and objective: driver event marker bus-off error passive voltage drop / brownout device reset FIFO or queue overflow a normally periodic message disappearing side-to-side communication mismatch, if the topology supports that For “learning normal,” I agree with your point, but I would not want to overclaim it as automatic root-cause diagnosis at first. A realistic first step would be learned baseline comparison for that specific vehicle and operating condition. For example, a value would only be compared against similar conditions: RPM range load / MAP throttle position gear / vehicle speed coolant and oil temperature battery voltage AFM/DFM state, if decoded and validated Then the report could flag things like: this periodic message disappeared compared with its normal timing this value deviated from this vehicle’s normal range under similar conditions the same abnormal pattern repeated after the same type of event the anomaly occurred together with voltage, oil-pressure, misfire, or communication changes But I would still call that “abnormal pattern detected,” not “replace this part,” unless there is enough validated repair data behind it. So the intended product would not be “here is a huge log.” It would need to be an event package: what triggered the capture how much pre/post data was preserved what changed before and after the event whether the device itself reset, overflowed, or saw a bus error selected graphs around the event raw data only as supporting evidence From your perspective, what would make this kind of report useful instead of just another datalog? For example: What are the top 5 parameters or events you would want highlighted first? Would you trust a learned baseline for that specific vehicle, or would you prefer fixed thresholds? How much false-positive flagging would be acceptable before you stopped looking at the reports? What would a one-page report need to show for an independent shop to take it seriously? For misfire, AFM/DFM, oil pressure, or U-code complaints, what would you want the tool to flag automatically?
    • scotthvac.net
      2022-24 halogen - led grille swap

      By scotthvac.net · Posted

      2024 Silverado 2500 HD LTZ grille no camera Parts list   84603331 84913656 84913657 84913654 84913655 84911567 84911568 85646092 85646093 85797921 85797922   11570637  x10-15   grille/bumper bolts 11546500  x10      grille clips 11571006  x10      push/retainer clips 11546454  x6       nut retainers 11611609  x6       M5 bolts 11610700  x6       molding/trim retainers

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...