U1261
Single Ended Negative Circuit Failure
U1261 is an OBD-II diagnostic trouble code meaning: Single Ended Negative Circuit Failure. Common causes: broken or damaged wire in the communication circuit, poor contact in connectors. Estimated repair cost: $6–33.
Symptoms
- The Check Engine light comes on
- Malfunctions of the car's electronic systems
- Problems with diagnostics via OBD-II connector
- Incorrect operation of related systems (for example, climate control, ABS)
Causes
- Broken or damaged wire in the communication circuit
- Poor contact in connectors
- Corroded contacts or terminals
- Malfunction of one of the electronic modules
- Vehicle weight problems
How to Fix
- Check the integrity of the wires in the communication circuit
- Inspect and clean the contacts in the connectors
- Check connections to vehicle ground
- Scan all modules for additional errors
- If necessary, replace damaged wires or connectors
Related codes
FAQ
What does the U1261 code mean?
U1261 is an OBD-II diagnostic trouble code that indicates: Single Ended Negative Circuit Failure
What causes a U1261 error code?
The most common causes of U1261 include: Broken or damaged wire in the communication circuit; Poor contact in connectors; Corroded contacts or terminals; Malfunction of one of the electronic modules.
How do I fix a U1261 diagnostic trouble code?
To fix U1261: Check the integrity of the wires in the communication circuit. Inspect and clean the contacts in the connectors. Check connections to vehicle ground. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U1261?
Yes, but get it checked soon
How much does it cost to fix U1261?
The estimated repair cost for U1261 is $6–33. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat