Engine Oil Bypass Valve Control Circuit/Open

Common symptoms

What you'll notice

• Check and replace the engine oil bypass valve if it is found to be faulty.
• Inspect and clean the engine oil filter for any clogs or debris.
• Verify and repair any loose or damaged wiring connections related to the engine oil bypass valve control circuit.
• Check and replace the engine oil pressure sensor if necessary.

Common causes

Most likely first

1. Malfunctioning engine oil pressure sensor
2. Clogged or dirty engine oil filter
3. Faulty engine oil bypass valve
4. Low engine oil level
5. Electrical issues with the engine oil bypass valve control circuit

How to diagnose & fix

Work through it in order

1. Engine misfires or stumbles
2. Decreased engine performance or power
3. Illuminated check engine light
4. Poor fuel economy
5. Engine overheating or excessive oil consumption