P24EC

NH3 Sensor Supply Voltage Circuit High

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Increased urea consumption (AdBlue)
Unstable engine operation
The system may go into emergency mode

Causes

Damaged NH3 sensor wiring harness
Corrosion or poor contact in connectors
NH3 sensor malfunction
Problems with the engine control unit
Short circuit in power supply

How to Fix

Check the integrity of the sensor wiring harness
Inspect and clean connector contacts
Check the sensor supply voltage
Replace NH3 sensor if necessary
Test the engine control unit

Related codes

P24EB P24ED P24EE