Charge Air Cooler Coolant Temperature Sensor A Circuit Low

Common symptoms

What you'll notice

• Check the wiring and connections for any damage or loose connections.
• Inspect the charge air cooler coolant temperature sensor for any signs of damage or malfunction.
• Replace the charge air cooler coolant temperature sensor if it is faulty or damaged.
• Inspect the charge air cooler for any blockage or restriction that may be causing the low circuit reading.
• Check the engine control module (ECM) for any software updates or reprogramming that may be required to address the issue.

Common causes

Most likely first

1. Faulty charge air cooler coolant temperature sensor
2. Loose or damaged wiring/connections in the circuit of the charge air cooler coolant temperature sensor A
3. Low coolant level in the charge air cooler coolant system
4. Malfunctioning engine control module (ECM) or powertrain control module (PCM)
5. Other issues related to the cooling system, such as a faulty radiator or water pump

How to diagnose & fix

Work through it in order

1. Engine overheating
2. Reduced engine performance
3. Poor fuel efficiency
4. Stalling or rough idling
5. Illuminated check engine light