OBD2 Car ScannerWhat does P229C mean?
P229C stands for Fuel Pressure Regulator 2 Exceeded Learning Limits - Too Low. The engine computer has found a problem with how fuel and air are measured or mixed. This affects fuel economy, emissions and sometimes how smoothly the engine runs.
Powertrain codes cover the engine, transmission and emissions. When the car's computer sees a reading outside its normal range, it stores this code and may turn on a warning light on the dashboard.
Common causes
- Vacuum or intake air leaks
- Dirty or faulty mass airflow (MAF) sensor
- Faulty oxygen sensor or its wiring
- Fuel pressure problems (pump, filter or regulator)
- Clogged or leaking fuel injectors
What to do
- Read all stored and pending codes with a scanner. Several codes together often point to one cause.
- Note the freeze frame data (speed, temperature, load) recorded when the code was set.
- Inspect the wiring and connectors of the part named in the code for damage, corrosion or looseness.
- Fix the most likely and cheapest cause first, then clear the code and drive to see if it comes back.
Read this code from your own car
Plug in a cheap ELM327 adapter and the app shows every fault code, what it means and how to fix it.
Frequently asked questions
What does P229C mean?
P229C means “Fuel Pressure Regulator 2 Exceeded Learning Limits - Too Low”. It belongs to the fuel and air metering group: The engine computer has found a problem with how fuel and air are measured or mixed. This affects fuel economy, emissions and sometimes how smoothly the engine runs.
Is it safe to drive with P229C?
You can usually drive carefully for a short time, but fix it soon to avoid further damage or higher fuel use.
How do I clear P229C?
Fix the cause, then clear the code with an OBD2 scanner or app. If the fault is still there, the code will come back.
Related codes
- P2295Fuel Pressure Regulator 2 Control Circuit Low
- P2296Fuel Pressure Regulator 2 Control Circuit High
- P229AFuel Pressure Regulator 2 Exceeded Control Limits - Pressure Too Low
- P229BFuel Pressure Regulator 2 Exceeded Control Limits - Pressure Too High
- P229DFuel Pressure Regulator 2 Exceeded Learning Limits - Too High
- P2300Ignition Coil A Primary Control Circuit Low
- P2301Ignition Coil A Primary Control Circuit High
- P2302Ignition Coil A Secondary Circuit
Code meanings can vary by manufacturer. This page is general guidance, not a repair manual. Always confirm the cause before replacing parts.