U0687
Lost Communication With Catalyst Temperature Bank 2 Sensor 2
U0687 is an OBD-II diagnostic trouble code meaning: Lost Communication With Catalyst Temperature Bank 2 Sensor 2. Common causes: open or short circuit in the sensor circuit, malfunction of the catalyst temperature sensor itself. Estimated repair cost: $28–89.
Symptoms
- Check Engine light comes on
- Possible increase in fuel consumption
- Decrease in catalyst efficiency
- The car may go into emergency mode
- Errors in the operation of the exhaust system
Causes
- Open or short circuit in the sensor circuit
- Malfunction of the catalyst temperature sensor itself
- Connector problems or contact corrosion
- Engine control module malfunction
- Wiring harness damage
How to Fix
- Check the integrity of the wiring to the temperature sensor
- Inspect the sensor connectors for corrosion or damage.
- Check the resistance of the temperature sensor (compare with specifications)
- If necessary, replace the catalyst temperature sensor
- Check and, if necessary, reflash the ECU
Related codes
Error U0687 by Vehicle Brand
FAQ
What does the U0687 code mean?
U0687 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Catalyst Temperature Bank 2 Sensor 2
What causes a U0687 error code?
The most common causes of U0687 include: Open or short circuit in the sensor circuit; Malfunction of the catalyst temperature sensor itself; Connector problems or contact corrosion; Engine control module malfunction.
How do I fix a U0687 diagnostic trouble code?
To fix U0687: Check the integrity of the wiring to the temperature sensor. Inspect the sensor connectors for corrosion or damage.. Check the resistance of the temperature sensor (compare with specifications). For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0687?
Yes, but get it checked soon
How much does it cost to fix U0687?
The estimated repair cost for U0687 is $28–89. Actual cost depends on your vehicle, location, and labor rates.
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