The P2038 trouble code indicates a range or performance issue in the reductant injection air pressure sensor “A” circuit.
P2038 Reductant Injection Air Pressure Sensor “A” Circuit Range/Performance
Code symptoms P2038.
1. Malfunction indicator lamp (MIL) or Check Engine Light (CEL) illuminated.
2. Reduced engine performance.
3. Decreased fuel efficiency.
4. Increased emissions.
This code is common in brands such as:: Chevrolet, Renault, Ford, Toyota, Nissan, Mercedes Benz, Honda.
Causes of the code P2038.
1. Faulty reductant injection air pressure sensor “A”.
2. Wiring or connector issues in the sensor circuit.
3. Vacuum leaks in the intake system.
4. Exhaust system leaks.
Code Solutions P2038.
1. Inspect the reductant injection air pressure sensor “A” and replace if faulty.
2. Check the wiring and connectors in the sensor circuit for damage, corrosion, or loose connections. Repair or replace as necessary.
3. Inspect the intake system for vacuum leaks and repair as needed.
4. Inspect the exhaust system for leaks and repair as needed.