P1448 — Diagnostic Module Tank Leakage DM-TL Pump Too Low During Switching

What Does P1448 Mean?

P1448 is a manufacturer-specific diagnostic trouble code: Diagnostic Module Tank Leakage DM-TL Pump Too Low During Switching. This code applies to BMW, VOLKSWAGEN, NISSAN, OTHER, JAGUAR 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 P1448

⚠️ Check Engine Light (MIL) illuminated
⚠️ Diagnostic Module Tank Leakage DM-TL Pump Too Low During Switching not functioning as expected
⚠️ Related system may be in fail-safe mode
⚠️ Reduced engine performance

Common Causes

🔍 Faulty Diagnostic Module Tank Leakage DM-TL Pump Too Low During Switching
🔍 Wiring or connector issue in Diagnostic Module Tank Leakage DM-TL Pump Too Low During Switching circuit
🔍 Related mechanical or electrical fault
🔍 ECM/PCM issue (rare)

Frequently Asked Questions

What does P1448 mean?

P1448 indicates: Diagnostic Module Tank Leakage DM-TL Pump Too Low During Switching. The vehicle's computer has detected that the Diagnostic Module Tank Leakage DM-TL Pump Too Low During Switching is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P1448?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P1448 for extended periods may cause additional problems.

How much does it cost to fix P1448?

Repair costs for P1448 typically range from $80 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

🔧 Inspect Diagnostic Module Tank Leakage DM-TL Pump Too Low During Switching and related wiring
🔧 Replace faulty Diagnostic Module Tank Leakage DM-TL Pump Too Low During Switching

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.

P1448: Diagnostic Module Tank Leakage DM-TL Pump Too Low During Switching