P2043

Reductant Temperature Sensor A Circuit Range/Performance

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Increased fuel consumption
Possible problems starting the engine
SCR system stops working

Causes

Reagent temperature sensor malfunction
Open or short circuit in the sensor circuit
Poor contact in the sensor connector
Wiring harness damage
Problems with the SCR control module

How to Fix

Check the continuity of the temperature sensor circuit
Check sensor connectors and connections
Check the sensor resistance (compare with the nominal value)
If necessary, replace the temperature sensor
Check and update SCR control module software

Related codes

P2044 P2045 P2046