P1449: Catalyst Temperature Sensor 2 Circuit Open Short To B+

VOLKSWAGEN BMW OTHER KIA MAZDA

Severity

Medium

System

Manufacturer-Specific Powertrain

Last reviewed: Jan 1, 0001 Last updated: Jan 1, 0001

Methodology: We combine code standards with complaint and reliability patterns, then review for clear, vehicle-first diagnosis steps.

Sources: SAE/OBD-II definitions, manufacturer service information, and public reliability reports (including NHTSA where applicable).

Limits: Guidance is informational and may not match every model-year or revision. Confirm with the official manual and diagnostics before replacing parts. For safety-critical or electrical work, use a qualified technician.

What Does P1449 Mean?

P1449 is a manufacturer-specific diagnostic trouble code: Catalyst Temperature Sensor 2 Circuit Open Short To B+. This code applies to VOLKSWAGEN, BMW, OTHER, KIA, MAZDA vehicles. Unlike generic OBD-II codes, manufacturer-specific codes are defined by the vehicle maker and may only apply to certain makes and models.

Symptoms of P1449

⚠️ Check Engine Light (MIL) illuminated
⚠️ No signal from Catalyst Temperature Sensor 2
⚠️ Related system defaulting to backup values
⚠️ Reduced engine performance

Common Causes

🔍 Broken wire in Catalyst Temperature Sensor 2 circuit
🔍 Disconnected Catalyst Temperature Sensor 2 electrical connector
🔍 Catalyst Temperature Sensor 2 internal open circuit failure
🔍 Corroded terminal pins preventing electrical contact

Frequently Asked Questions

What does P1449 mean?

P1449 indicates: Catalyst Temperature Sensor 2 Circuit Open Short To B+. The vehicle's computer has detected that the Catalyst Temperature Sensor 2 is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P1449?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P1449 for extended periods may cause additional problems.

How much does it cost to fix P1449?

Repair costs for P1449 typically range from $30 to $300, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

🔧 Locate and repair broken wire in Catalyst Temperature Sensor 2 circuit
🔧 Replace damaged Catalyst Temperature Sensor 2 connector
🔧 Replace Catalyst Temperature Sensor 2 if internally open

1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.