Tech Tip: Finicky Silverado throws oil pressure DTC

Customer brought in their 2020 Chevy Silverado because the malfunction indicator light (MIL) was on.

Related To:

Aug. 23, 2024

A customer brought in their 2020 Chevy Silverado into a repair shop because the malfunction indicator light (MIL) was on. There were no drivability complaints. The owner mentioned that it was a fleet truck, and it just had the oil changed while out of town.

Case details

The technician connected a scan tool and found this diagnostic trouble code (DTC): P06DB - Engine Oil Pressure Control Solenoid Valve Control Circuit Low Voltage.

An ALLDATA Tech-Assist consultant suggested starting the diagnosis by making sure the "out of town" oil change was performed with the correct viscosity and a factory filter. If it was, then he should follow the DTC troubleshooting chart.

The technician checked the oil filter, and it was an aftermarket brand. He couldn’t tell if the oil viscosity was correct.

Confirmed repair

The technician changed the oil using an OEM filter and the recommended brand and viscosity of oil. He cleared the DTC and then took the truck for a road test. There were no further issues. Easy Fix!

About the Author

ALLDATA Tech-Assist Team

The ALLDATA Tech-Assist Diagnostic team is a group of top-notch ASE Master Technicians who have devoted numerous years to the automotive industry as independent shop and dealership technicians, shop owners and a many of them have also been automotive instructors.

Each team member is passionate about helping technicians of all skill levels get vehicles diagnosed and repaired quickly and correctly the first time. Because they help diagnose such a large number of vehicles every day, they are a wealth of experience-based diagnostic knowledge.