P24E1

NH3 Sensor Circuit

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–278 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Increased fuel consumption
Unstable engine operation
Possible ammonia odor

Causes

NH3 sensor malfunction
Open or short circuit in sensor wiring
Poor contact in sensor connectors
Engine control unit (ECU) malfunction
Problems with the SCR (Selective Catalytic Reduction) system

How to Fix

Check the wiring and connectors of the NH3 sensor for damage
Check NH3 sensor resistance
Check the supply voltage of the NH3 sensor
Replace NH3 sensor if necessary
Check and, if necessary, update ECU software

Related codes

P24E0 P24E2 P24E3