Hybspec

P0172

Średni

System Too Rich — Bank 1

OBD-II (EN): System Too Rich (Bank 1)

Code P0172 — System Too Rich — Bank 1. Symptoms: black smoke from exhaust. Possible cause: leaking fuel injectors. Professional diagnosis recommended.

Symptoms

Black smoke from exhaust, smell of gasoline, increased fuel consumption

Possible causes

Leaking fuel injectors, faulty fuel pressure regulator, contaminated MAF sensor, damaged oxygen sensor

Affected systems

Silnik spalinowyUkład paliwowy

Related codes

Does code P0172 require professional diagnostics?

The code alone is not enough. To find the cause, you need to read live data, check freeze frame conditions, and compare with vehicle behavior. Book a diagnostic session.