P0437

Catalyst 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 catalytic converter efficiency
Possible increase in fuel consumption

Causes

Malfunction of the catalytic converter temperature sensor
Open or short circuit in wiring harness
Poor contact in connectors
Engine control unit (ECU) malfunction

How to Fix

Check the integrity of the wiring harness and contacts
Check the resistance of the temperature sensor
Replace temperature sensor if necessary
Check the operation of the engine control unit

Related codes

P0420 P0430 P0431