U1140
Lost Communication With Active Exhaust Valve 2
U1140 is an OBD-II diagnostic trouble code meaning: Lost Communication With Active Exhaust Valve 2. Common causes: open or short circuit in valve circuit, active exhaust valve malfunction. Estimated repair cost: $56–167.
Symptoms
- Check Engine Light on Dashboard
- Changing the sound of the exhaust system
- Possible reduction in engine performance
- Errors in the exhaust control system
- The active valve may be stuck in one position
Causes
- Open or short circuit in valve circuit
- Active exhaust valve malfunction
- Connector problems or contact corrosion
- Exhaust control module malfunction
- Software error in the control unit
How to Fix
- Check the integrity of the wiring to the active valve
- Inspect connectors and contacts for corrosion
- Check valve resistance and operation
- Scan the system for additional errors
- If necessary, replace the active exhaust valve
Related codes
FAQ
What does the U1140 code mean?
U1140 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Active Exhaust Valve 2
What causes a U1140 error code?
The most common causes of U1140 include: Open or short circuit in valve circuit; Active exhaust valve malfunction; Connector problems or contact corrosion; Exhaust control module malfunction.
How do I fix a U1140 diagnostic trouble code?
To fix U1140: Check the integrity of the wiring to the active valve. Inspect connectors and contacts for corrosion. Check valve resistance and operation. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U1140?
Yes, but get it checked soon
How much does it cost to fix U1140?
The estimated repair cost for U1140 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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