P1404 BUICK - Exhaust Gas Recirculation Closed Position Performance
- Carbon blockage of the pintle
- Faulty Exhaust Gas Recirculation (EGR) valve
On some models, there is a service bulletin for the P1404 code that suggests reprogramming the Powertrain Control Module (PCM) to repair the problem.
When is the code detected?
While monitoring the Exhaust Gas Recirculation (EGR) valve pintle position the Powertrain Control Module (PCM) detected the closed position sensor voltage higher than the learned closed position voltage.
- Engine Light ON (or Service Engine Soon Warning Light)
P1404 BUICK Description
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