B2997 Code - Short In The Heater Core Temperature Sensor Circuit
Quick Answer
The Climate Control Unit monitors the Heater Core Temperature Sensor. Common causes include Faulty Heater Core Temperature Sensor, Heater Core Temperature Sensor harness is open or shorted, Heater Core Temperature Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- B2997 indicates Short In The Heater Core Temperature Sensor Circuit.
- Common causes
- Common causes include Faulty Heater Core Temperature Sensor, Heater Core Temperature Sensor harness is open or shorted, Heater Core Temperature Sensor circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code B2997 Description
What are the Possible Causes of the DTC B2997?
- Faulty Heater Core Temperature Sensor
- Heater Core Temperature Sensor harness is open or shorted
- Heater Core Temperature Sensor circuit poor electrical connection
- Faulty Climate Control Unit
How to Fix the DTC B2997?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B2997 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the B2997 code?
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Need Help with the Code?
Get the B2997 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- B2997 Acura — Short In The Heater Core Temperature Sensor Circuit
- B2997 Honda — Short In The Heater Core Temperature Sensor Circuit
Frequently Asked Questions about B2997 Code
1. What does OBDII code B2997 mean?
Code B2997 indicates a short circuit in the heater core temperature sensor circuit, which monitors the temperature of coolant passing through the heater core.
2. What are the symptoms of a B2997 code?
Common symptoms include poor cabin heating performance, inconsistent temperature regulation, or the HVAC system operating in default mode.
3. What causes the B2997 code to appear?
The code is typically caused by damaged wiring, a faulty heater core temperature sensor, or a short to ground or power in the sensor's circuit.
4. Can I drive my car with a B2997 code?
While you can drive with this code, it may result in reduced heating performance or HVAC system issues. It's best to address the problem promptly.
5. How do I diagnose a B2997 code?
Start by inspecting the wiring and connectors for damage or corrosion. Test the heater core temperature sensor with a multimeter to check for proper resistance and continuity.
6. What tools are needed to fix a B2997 code?
You may need a multimeter, wiring diagrams, an OBDII scanner, and potentially replacement parts such as a new temperature sensor or wiring.
7. How much does it cost to repair a B2997 code?
Repair costs vary but typically range from $100 to $300, depending on whether the issue is with the sensor, wiring, or both.
8. Will clearing the code fix the problem?
Clearing the code without addressing the underlying issue will only temporarily remove it. The code will return if the fault still exists.
9. Can a bad thermostat cause a B2997 code?
No, a faulty thermostat does not directly cause this code. The code is specific to the heater core temperature sensor circuit.
10. Is the B2997 code related to engine performance?
No, this code is related to the HVAC system and does not directly affect engine performance. However, it may impact cabin comfort.
Discuss the causes and fixes for B2997 OBDII Code
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