U3561
Cathode Bypass Valve Control Circuit
U3561 is an OBD-II diagnostic trouble code meaning: Cathode Bypass Valve Control Circuit. Common causes: cathode bypass valve failure, open or short circuit in control circuit. Estimated repair cost: $56–167.
Symptoms
- Increased fuel consumption
- Reduced engine power
- Check Engine light comes on
- Unstable engine operation at idle
- Problems starting the engine
Causes
- Cathode bypass valve failure
- Open or short circuit in control circuit
- Poor contact in circuit connectors
- Control unit malfunction
- Wiring harness damage
How to Fix
- Check valve control circuit integrity
- Check the condition of connectors and contacts
- Test valve resistance
- Check valve operation using diagnostic equipment
- If necessary, replace the cathode bypass valve
Related codes
Error U3561 by Vehicle Brand
FAQ
What does the U3561 code mean?
U3561 is an OBD-II diagnostic trouble code that indicates: Cathode Bypass Valve Control Circuit
What causes a U3561 error code?
The most common causes of U3561 include: Cathode bypass valve failure; Open or short circuit in control circuit; Poor contact in circuit connectors; Control unit malfunction.
How do I fix a U3561 diagnostic trouble code?
To fix U3561: Check valve control circuit integrity. Check the condition of connectors and contacts. Test valve resistance. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U3561?
Yes, but get it checked soon
How much does it cost to fix U3561?
The estimated repair cost for U3561 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat