P0548

Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 1

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Deteriorating fuel economy
Problems starting the engine in cold weather

Causes

Exhaust gas temperature (EGT) sensor malfunction
Open or short circuit in wiring harness
Poor connection or corrosion in connectors
Engine control unit (ECU) malfunction

How to Fix

Check the integrity of the EGT sensor wiring harness and connectors
Measure the resistance of the EGT sensor and compare with manufacturer's specifications
Check the voltage and signal of the sensor using an oscilloscope or multimeter
Replace the EGT sensor if a fault is detected
Clean or replace connectors if corroded

Related codes

P0546 P0547 P0549