Exhaust Aftertreatment Power Relay Control Circuit Stuck Off

Common symptoms

What you'll notice

• Check the wiring connections to the exhaust aftertreatment power relay and ensure they are secure and free of any damage.
• Inspect the exhaust aftertreatment power relay for any signs of malfunction or damage and replace it if necessary.
• Test the exhaust aftertreatment power relay control circuit for any voltage irregularities and repair or replace any faulty components.

Common causes

Most likely first

1. Faulty exhaust aftertreatment power relay
2. Loose or corroded electrical connections in the power relay circuit
3. Defective exhaust aftertreatment system components
4. Clogged or blocked exhaust aftertreatment system
5. Malfunctioning engine control module (ECM) or powertrain control module (PCM)

How to diagnose & fix

Work through it in order

1. Check engine light illuminated on the dashboard
2. Decreased engine performance or power
3. Increased fuel consumption
4. Rough idling or engine misfires
5. Emission
6. related issues, such as excessive smoke or odor