The P2064 trouble code indicates that the reductant or regeneration supply control circuit is detecting a high voltage condition.
P2064 Reductant/Regeneration Supply Control Circuit High
Code symptoms P2064.
1. Malfunction indicator lamp (MIL) or Check Engine Light (CEL) illuminated.
2. Decreased fuel efficiency.
3. Reduction in engine performance.
4. Changes in exhaust emissions.
This code is common in brands such as:: Chevrolet, Renault, Ford, Toyota, Nissan, Mercedes Benz, Honda.
Causes of the code P2064.
1. Faulty reductant or regeneration supply control valve.
2. Short to voltage in the reductant or regeneration supply control circuit.
3. Corrosion or damage to the connectors in the reductant or regeneration supply control circuit.
4. Faulty powertrain control module (PCM).
Code Solutions P2064.
1. Inspect the reductant or regeneration supply control valve and replace if faulty.
2. Check for a short to voltage in the reductant or regeneration supply control circuit using a multimeter. Repair any shorts found.
3. Inspect the connectors in the reductant or regeneration supply control circuit for corrosion or damage. Clean or replace connectors as necessary.
4. Perform a PCM reset or reflash to clear the code. If the issue persists, consider replacing the PCM.