P229D

Fuel Pressure Regulator B Exceeded Learning Limits - Too High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$28–89 (est.)

Symptoms

Unstable engine operation
Increased fuel consumption
Power Loss
Difficulty starting the engine
Check Engine Light Is On

Causes

Fuel pressure regulator B malfunction
Problems with the fuel pump
Fuel filter clogged
Fuel pressure sensor malfunction
Problems with wiring or contacts

How to Fix

Check the fuel pressure in the system
Inspect fuel pressure regulator B for damage.
Check the condition of the fuel filter
Diagnose the operation of the fuel pump
Check electrical connections and wiring

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