U0620
Lost Communication With Exhaust Gas Temperature Sensor Bank 1 Sensor 2
U0620 is an OBD-II diagnostic trouble code meaning: Lost Communication With Exhaust Gas Temperature Sensor Bank 1 Sensor 2. Common causes: open or short circuit in the sensor circuit, malfunction of the exhaust temperature sensor itself. Estimated repair cost: $28–89.
Symptoms
- Check Engine light comes on
- Reduced engine power
- Deteriorating fuel economy
- Possible transition to emergency mode
- Problems with the exhaust gas recirculation system
Causes
- Open or short circuit in the sensor circuit
- Malfunction of the exhaust temperature sensor itself
- Poor contact in the sensor connector
- Wiring harness damage
- Problems with the engine control unit
How to Fix
- Check the integrity of the sensor circuit (resistance, voltage)
- Inspect the sensor connector and contacts for oxidation
- Check the functionality of the EGT sensor
- If necessary, replace the exhaust temperature sensor
- Check the condition of the wiring harness in the area to the sensor
Related codes
Error U0620 by Vehicle Brand
FAQ
What does the U0620 code mean?
U0620 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Exhaust Gas Temperature Sensor Bank 1 Sensor 2
What causes a U0620 error code?
The most common causes of U0620 include: Open or short circuit in the sensor circuit; Malfunction of the exhaust temperature sensor itself; Poor contact in the sensor connector; Wiring harness damage.
How do I fix a U0620 diagnostic trouble code?
To fix U0620: Check the integrity of the sensor circuit (resistance, voltage). Inspect the sensor connector and contacts for oxidation. Check the functionality of the EGT sensor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0620?
Yes, but get it checked soon
How much does it cost to fix U0620?
The estimated repair cost for U0620 is $28–89. Actual cost depends on your vehicle, location, and labor rates.
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