Error Code P080B is defined as Upshift/Skip Shift Solenoid Control Circuit Range/Performance. Error Code P0808 is a generic trouble code, meaning it applies to all vehicles with the OBD-II system, especially those made from 1996 up to present. Specifications on the definition and steps for repairs may vary depending on the model and make of the vehicle.

This code is referred to as Upshift/Skip Shift Solenoid Control Circuit Range/Performance. The signal of the upshift/skip shift solenoid circuit is monitored by the Transmission Control Module (TCM). This code is registered by the TCM when the upshift/skip shift solenoid would not be as per the factory specifications.

Common Symptoms

This error code doesn’t usually cause driving and performance symptoms. Instead, it will only activate the service engine light.

Possible Causes

  • Fault in the upshift/skip shift solenoid
  • Opened or shorted upshift/skip shift solenoid harness
  • Faulty electrical connection in the upshift/skip shift solenoid circuit

How to Check

As with most codes, the best way to start your diagnosis with this kind of error code is to refer to a technical service bulletin (TSB) for the specific year, make, model, and power plant of the vehicle. This can save a lot of time in the long run.

Use an OBD-II scanner to troubleshoot this code to take off the freeze frame data and gather the details before this code appeared. Also, make sure you check for the presence of other trouble codes.

If there are other codes present, address these problems in a similar order they appear on the scanner. After addressing each code, reset the trouble codes and restart the vehicle to see if the codes come back.

If the codes don’t come back, then there’s a good chance it was either incorrectly triggered or an intermittent problem. If it’s the latter, then you may have to wait for the condition to worsen before you can properly diagnose.

Next, check the Auto Transmission Shift Solenoid. Many problems can arise from a defective auto transmission shift solenoid.

Next, check the Auto Transmission Filter and Transmission Torque Converter. Problems in these parts can result in this error code. The latter also needs full care from time to time.

Then, check the Auto Transmission Valve Body Kit, make sure it’s working efficiently.

Next, check the engine wiring harness. Issues in the wiring harness can lead to this code. Any open or short must be repaired or replaced as soon as possible.

Lastly, check the body control module component. Replace this part if necessary.

How to Fix

  • Clean the connectors off of corrosion
  • Repair the faulty ground straps
  • Repair or replace defective wires
  • Adjust the faults in the fuse of fuse-able link carefully
  • Replace defective PCM or TCM (rare)

This error code can be tricky to fix. Thus, it’s best to take your vehicle to a qualified technician and have it addressed as soon as possible.