P24E5

NH3 Sensor Circuit Intermittent/Erratic

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine light comes on
Engine performance deterioration
Increased fuel consumption
Power dips
Unstable idling

Causes

Open or short circuit in the NH3 sensor circuit
Poor contact in sensor connectors
NH3 sensor malfunction
Problems with the SCR control module
Corroded or damaged wires

How to Fix

Check the integrity of wiring and connectors
Clean sensor contacts and connectors
Check the resistance and voltage in the sensor circuit
Replace NH3 sensor if necessary
Check and reflash the SCR control module if necessary

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