B27C3 Infiniti Code - PTC Outlet Air Temperature Sensor High
Quick Answer
The Diagnostic Trouble Code (DTC) sets when the Positive Temperature Coefficient (PTC) heater outlet air temperature sensor recognition temperature is too high [more than 200°C (392°F)]. Common causes include Faulty Positive Temperature Coefficient (PTC) Outlet Air Temperature Sensor, PTC Outlet Air Temperature Sensor harness is open or shorted, PTC Outlet Air 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
- B27C3 Infiniti indicates PTC Outlet Air Temperature Sensor High.
- Common causes
- Common causes include Faulty Positive Temperature Coefficient (PTC) Outlet Air Temperature Sensor, PTC Outlet Air Temperature Sensor harness is open or shorted, PTC Outlet Air 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 B27C3 Infiniti Description
What are the Possible Causes of the DTC B27C3 Infiniti?
- Faulty Positive Temperature Coefficient (PTC) Outlet Air Temperature Sensor
- PTC Outlet Air Temperature Sensor harness is open or shorted
- PTC Outlet Air Temperature Sensor circuit poor electrical connection
- Faulty A/C Auto Amplifier
How to Fix the DTC B27C3 Infiniti?
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 B27C3 Infiniti 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.
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Frequently Asked Questions about B27C3 Infiniti Code
1. What does the OBDII code B27C3 mean on an Infiniti vehicle?
B27C3 indicates an issue with the PTC Outlet Air Temperature Sensor, specifically detecting a high voltage reading or temperature outside the normal range.
2. What are the common symptoms of the B27C3 code?
Symptoms may include irregular heating performance, poor cabin temperature regulation, or the HVAC system not functioning as expected.
3. What causes the B27C3 code to appear?
Common causes include a faulty PTC Outlet Air Temperature Sensor, damaged wiring or connectors, or an issue with the HVAC control module.
4. Can I drive my Infiniti with the B27C3 code?
Yes, you can drive the vehicle, but the cabin heating system may not work correctly, which could be uncomfortable in colder weather.
5. How do I diagnose the B27C3 code on my Infiniti?
Start by inspecting the PTC Outlet Air Temperature Sensor, wiring, and connectors for damage. Use a multimeter to check for proper voltage and continuity.
6. How can I fix the B27C3 code on my Infiniti?
Repairs may involve replacing the PTC Outlet Air Temperature Sensor, repairing damaged wiring, or reprogramming the HVAC control module if necessary.
7. How much does it cost to fix the B27C3 code?
The repair cost depends on the issue. Replacing the sensor typically costs $100–$300, but wiring repairs or control module programming may vary.
8. Where is the PTC Outlet Air Temperature Sensor located on an Infiniti?
The sensor is usually located near the HVAC system's air outlet or heating element, often behind the dashboard.
9. Can I reset the B27C3 code without fixing the issue?
You can clear the code with an OBDII scanner, but it will likely return if the underlying issue isn't resolved.
10. What happens if I ignore the B27C3 code?
If ignored, you may experience ongoing HVAC system issues, discomfort in extreme temperatures, and the potential for further component damage.
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