P24E6

NH3 Sensor Heater Circuit/Open

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$89–278 (est.)

Symptoms

Check Engine light comes on
Reduced efficiency of the SCR system
Possible increase in fuel consumption
Loss of engine power
Problems with passing inspection due to emissions

Causes

Broken wire in the heater circuit
Malfunction of the NH3 sensor heater itself
Relay or fuse problems
Corrosion or poor contact in connectors
SCR control unit malfunction

How to Fix

Check the integrity of wiring and connectors
Check heater circuit fuses and relays
Measure the resistance of the NH3 sensor heating element
Check the power and ground of the heater circuit
If necessary, replace the NH3 sensor

Related codes

P24E5 P24E7 P229F