Code result
P229D
Fuel Pressure Regulator B Exceeded Learning Limits - Too High
High severity
What it means
The adaptive learning offset for fuel pressure regulator B has reached the upper limit. Long-term drift upward indicates progressive wear of the regulator or a return path that is becoming restricted.
Is it safe to drive?
No — stop driving
This code points to a problem that can cause damage or affect safety. Avoid driving and have the vehicle diagnosed promptly.
Most likely causes
Long-term drift upward
highOne of the most commonly reported causes for this code — check this first.
Related help
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