P008B code meaning
Low Pressure Fuel System Pressure - Too High
Powertrain system Generic code P00xx codes Check engine light
What P008B means
Some engines, mainly gasoline direct injection with a demand-controlled in-tank pump, have their own pressure sensor in the low-pressure line between the tank pump and the high-pressure pump. The engine control module compares this supply pressure with its target. P008B is set when the supply pressure stays too high. Manufacturer bulletins name a faulty low-pressure sensor as the most common cause, for example from fuel entering the sensor and falsifying its signal; a mechanical gauge test clarifies whether the pressure is really too high.
P008B at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 3 hours
- Clears after repairAfter a drive cycle
Symptoms of P008B
- Check engine light on
- Often no drivability symptoms
Common causes of P008B
- Most likelyLow-pressure sensor faulty
- PossiblePump control unit or software
- Less likelyReturn line or regulator blocked
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Low pressure fuel sensorFuel pump control moduleLow pressure fuel pump
What each part of P008B means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 0 | Area: fuel and air metering and auxiliary emission controls. |
| 8B | The exact fault in that area. |
What to do next
- Note P008B and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P008B
What does P008B mean?
P008B means "Low Pressure Fuel System Pressure - Too High". Some engines, mainly gasoline direct injection with a demand-controlled in-tank pump, have their own pressure sensor in the low-pressure line between the tank pump and the high-pressure pump. It is a generic code, so it means the same on every make.
Is it safe to drive with P008B?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P008B fail an emissions test?
Yes, it can. P008B is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P008B to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P008B clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.