Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer thinks there's too much fuel pressure in a part of the engine. It's like blowing too much air into a balloon and worrying it might pop.
The engine control module (ECM) monitors the fuel pressure in the fuel system. If it detects that the pressure is higher than the expected range, it triggers the P229B code.
The P229B code is set when the ECM detects that the fuel pressure regulator 'B' is allowing the fuel pressure to exceed the control limits. This can be due to a malfunctioning fuel pressure regulator or issues with the fuel pump or fuel lines.
• Check Engine Light illuminated
• Poor fuel economy
• Engine may run rough or stall
• Faulty fuel pressure regulator
• Malfunctioning fuel pump
• Clogged fuel lines or filter
ECM: Engine Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Use a diagnostic scanner to confirm the code.
• Inspect the fuel pressure regulator for damage or leaks.
• Check fuel pressure using a gauge to compare with manufacturer specifications.
• Replace the faulty fuel pressure regulator.
• Repair or replace the fuel pump if necessary.
• Clean or replace clogged fuel lines or filter.
• OBD-II scanner
• Fuel pressure gauge
• Basic hand tools
$200 - $600
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly maintain the fuel system.
• Use high-quality fuel.
• Replace fuel filters as recommended.
Engine Performance
• Do not ignore the Check Engine Light.
• Have the fuel system inspected by a professional.
• Avoid driving aggressively until the issue is resolved.
Fuel system components may be covered under the vehicle's powertrain warranty.
This code has been associated with fuel system issues in vehicles with direct fuel injection systems.
Moderate – This issue can lead to poor engine performance and should be addressed promptly.
Ignoring this code may lead to increased emissions and potential safety hazards.
• Engine running at normal operating temperature
• Vehicle in idle or cruising speed
The fuel pressure regulator is typically located on the fuel rail or near the fuel pump.
Q: Can I drive with a P229B code?
A: It's not recommended to drive for long with this code, as it can cause engine performance issues.
Q: How do I reset the P229B code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue is fixed, it should not return.
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