P0438

Catalyst Temperature Sensor Circuit High 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 efficiency
Increased fuel consumption
Increased level of harmful emissions

Causes

Malfunction of the catalytic converter temperature sensor
Open or short circuit in wiring harness
Problems with contacts in the electrical circuit
ECU malfunction

How to Fix

Check the condition of the wiring harness and sensor contacts
Test the catalytic converter temperature sensor
Replace sensor if necessary
Check the integrity of the electrical circuit
Reset the error and re-test

Related codes

P0420 P0430 P2096