Circuit/System Testing
WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
P0506
- Verify the conditions listed below do not exist.
- Restricted exhaust
- Mechanical conditions that limits engine speed
- Parasitic load on the engine - For example, a transmission condition, a belt driven accessory condition.
- If a condition is found
Repair as necessary.
- Go to next step: If a condition is not found
- All OK.
P0507
- Verify the conditions listed below do not exist.
- Vacuum leaks
- A throttle valve that does not close correctly
- Verify the correct operation of the crankcase ventilation system. Inspect for the conditions listed below:
- Improper routing of the positive crankcase ventilation (PCV) system
- Vacuum leaks in the PCV system - Refer to Crankcase Ventilation System Inspection/Diagnosis .
- If a condition is found
Repair as necessary.
- Go to next step: If a condition is not found
- All OK.