B2515
Low Severity (Level 2)Heater Blower Relay Circuit Failure
B2515 usually means heater Blower Relay Circuit Failure.
Can you still drive with B2515?
⚠️Short-distance driving is usually OK, but have this diagnosed within a week to prevent further damage.
Typical repair cost: $50 – $800
Severity Level 2 — Low
This code indicates a minor issue that is unlikely to cause immediate driveability problems. You can typically continue driving but should have the vehicle inspected at your earliest convenience.
Common Symptoms
- Warning light or message on dashboard related to the climate control / HVAC system
- A/C or heat output inconsistent — temperature won't adjust
- Blower motor not working or only working on certain speeds
- Diagnostic trouble code (DTC) stored in module memory
Possible Causes
- Failed blower motor — internal fault from age, heat cycling, and vibration
- Damaged wiring or corroded connector in the climate control / HVAC system circuit
- Blown fuse for the climate control / HVAC system circuit — check before replacing components
- Faulty control module driving the blower motor
- Loose or corroded ground point shared by the climate control / HVAC system
Common Fixes
- Scan vehicle with a professional-grade OBD2 scanner to read all stored codes and freeze frame data — note the conditions when the code set ($43-102 at shop, free at auto parts store for basic scan)
- Visually inspect the climate control / HVAC system wiring harness and connectors — look for chafed wires, melted insulation, green corrosion, loose pins, or rodent damage (often free to check yourself, $102 diagnostic fee at shop)
- Replace blower motor if testing confirms it has failed — use OEM quality, avoid the cheapest no-name aftermarket parts that fail in a year ($50-800)
- Check and replace any blown fuses in the climate control / HVAC system fuse circuit — if fuse blows again, there's still a short that needs to be found ($1-17 for fuses)
- Perform a wiggle test on the climate control / HVAC system wiring harness while monitoring live data — see if the fault returns when you move the harness at different points ($0-131 diagnostic labor)
Estimated Repair Cost
These are estimated costs based on generic repair data. Actual costs may vary depending on your vehicle, location, and labor rates.
Frequently Asked Questions
What does B2515 mean?
B2515 stands for "Heater Blower Relay Circuit Failure". B2515 usually means heater Blower Relay Circuit Failure.
Can you drive with B2515?
Short-distance driving is usually OK, but have this diagnosed within a week to prevent further damage.
How much does it cost to fix B2515?
Repair costs for B2515 typically range from $50 to $800, depending on your vehicle make, model, and local labor rates. Common fixes include: Scan vehicle with a professional-grade OBD2 scanner to read all stored codes and freeze frame data — note the conditions when the code set ($43-102 at shop, free at auto parts store for basic scan); Visually inspect the climate control / HVAC system wiring harness and connectors — look for chafed wires, melted insulation, green corrosion, loose pins, or rodent damage (often free to check yourself, $102 diagnostic fee at shop); Replace blower motor if testing confirms it has failed — use OEM quality, avoid the cheapest no-name aftermarket parts that fail in a year ($50-800).
Will B2515 clear itself?
Explore Repair Costs
Related OBD-II Codes
These codes are in the same range as B2515 and often share similar causes and fixes.
Worried about repair costs?
Get transparent estimates and verify your mechanic's quote before authorizing repairs.
Related Discussions
See what other car owners are saying about this code and related repairs.
View B2515 discussions in the community