P2B21
Hybrid/EV Electronics Coolant Temperature Sensor B Circuit Range/Perfomance
P2B21 is an OBD-II diagnostic trouble code meaning: Hybrid/EV Electronics Coolant Temperature Sensor B Circuit Range/Perfomance. Common causes: coolant temperature sensor b malfunction, open or short circuit in the sensor circuit. Estimated repair cost: $17–56.
Symptoms
- Incorrect coolant temperature readings
- Check Engine Light Illuminates
- Reduced performance of the hybrid system
- Overheating of electronic components
- Incorrect operation of the cooling system
Causes
- Coolant temperature sensor B malfunction
- Open or short circuit in the sensor circuit
- Poor contact in sensor connectors
- Problems with the control module
- Sensor is dirty or damaged
How to Fix
- Check the integrity of the sensor circuit
- Check sensor contacts and connectors
- Replace coolant temperature sensor B if necessary
- Check and, if necessary, replace the control module
- Clean or replace damaged wires
Related codes
Error P2B21 by Vehicle Brand
FAQ
What does the P2B21 code mean?
P2B21 is an OBD-II diagnostic trouble code that indicates: Hybrid/EV Electronics Coolant Temperature Sensor B Circuit Range/Perfomance
What causes a P2B21 error code?
The most common causes of P2B21 include: Coolant temperature sensor B malfunction; Open or short circuit in the sensor circuit; Poor contact in sensor connectors; Problems with the control module.
How do I fix a P2B21 diagnostic trouble code?
To fix P2B21: Check the integrity of the sensor circuit. Check sensor contacts and connectors. Replace coolant temperature sensor B if necessary. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P2B21?
Yes, but get it checked soon
How much does it cost to fix P2B21?
The estimated repair cost for P2B21 is $17–56. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat