P0548 — Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 1

What Does P0548 Mean?

P0548 is a diagnostic trouble code indicating: Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 1. This code relates to the vehicle speed and idle control system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P0548

⚠️ Check Engine Light (MIL) illuminated
⚠️ Exhaust Gas Temperature Sensor reading at zero or minimum value
⚠️ Related system not functioning or in fail-safe mode
⚠️ Erratic idle speed

Common Causes

🔍 Open or broken wire in Exhaust Gas Temperature Sensor circuit
🔍 Poor ground connection at Exhaust Gas Temperature Sensor
🔍 Faulty Exhaust Gas Temperature Sensor with no output signal
🔍 Disconnected or loose Exhaust Gas Temperature Sensor connector
🔍 Blown fuse in related circuit

Frequently Asked Questions

What does P0548 mean?

P0548 indicates: Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 1. The vehicle's computer has detected that the Exhaust Gas Temperature Sensor is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P0548?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P0548 for extended periods may cause additional problems.

How much does it cost to fix P0548?

Repair costs for P0548 typically range from $20 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

🔧 Repair broken wire or restore ground in Exhaust Gas Temperature Sensor circuit
🔧 Clean and secure Exhaust Gas Temperature Sensor connector and ground points
🔧 Replace failed Exhaust Gas Temperature Sensor

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.

P0548: Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 1