B2774
PTC Heater Circuit 2
B2774 is an OBD-II diagnostic trouble code meaning: PTC Heater Circuit 2. Common causes: open or short circuit in the heater circuit, malfunction of the ptc heater itself. Estimated repair cost: $56–167.
Symptoms
- Lack or weak blowing of warm air
- Uneven interior heating
- The HVAC fault light on the instrument panel comes on
Causes
- Open or short circuit in the heater circuit
- Malfunction of the PTC heater itself
- Wiring harness damage
- Relay or fuse failure
- HVAC control unit problem
How to Fix
- Check fuses and relays associated with the HVAC system
- Measure PTC heater resistance (should be between 5-50 ohms when cold)
- Inspect the wiring harness for damage
- Check the voltage at the heater terminals
- If necessary, replace the PTC heater or damaged circuit components
Related codes
FAQ
What does the B2774 code mean?
B2774 is an OBD-II diagnostic trouble code that indicates: PTC Heater Circuit 2
What causes a B2774 error code?
The most common causes of B2774 include: Open or short circuit in the heater circuit; Malfunction of the PTC heater itself; Wiring harness damage; Relay or fuse failure.
How do I fix a B2774 diagnostic trouble code?
To fix B2774: Check fuses and relays associated with the HVAC system. Measure PTC heater resistance (should be between 5-50 ohms when cold). Inspect the wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B2774?
Yes, but get it checked soon
How much does it cost to fix B2774?
The estimated repair cost for B2774 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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