Code result
P0548
Exhaust Gas Temperature Sensor Circuit Low
Moderate severity
What it means
Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 1: the signal voltage is below the expected range. The ECU uses this temperature to protect the catalyst and diesel particulate filter.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Signal shorted to ground
highOne of the most commonly reported causes for this code — check this first.
Connector pins corroded - high contact resistance
lowLess common, but worth ruling out after the more likely causes.
Harness chafing through insulation
lowLess common, but worth ruling out after the more likely causes.
Related help
Get the full diagnosis
Add your vehicle and see step-by-step repair help, recalls, and TSBs in Wrenchify.
Diagnose P0548 freeNo credit card required