P018B

Fuel Pressure Sensor B Circuit Range/Performance

Q: Is it safe to drive with P018B?

Only cautiously. A bad fuel-pressure signal can put the engine into reduced power or cause stalling, so it's best to diagnose it before depending on the car.

Q: Can I just clear P018B?

It returns while the reading stays implausible. Either the sensor and its wiring, or a real fuel-pressure problem, has to be fixed first.

Fuel system Generic OBD-II High

What it means

P018B means the "B" fuel pressure sensor is reading a value that's out of range or inconsistent with actual fuel pressure. It can be the sensor and its wiring, or a genuine pressure problem making the signal implausible. Because the ECM relies on this reading to manage fueling, it may cut power or cause stalling until the fault is resolved.

High

Can I keep driving? Drive gently at most — a wrong fuel-pressure signal can trigger reduced power or stalling, so have it checked before relying on the car.

Real-world scan data

Seen in

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

Common symptoms

What you'll notice

Check-engine light on
Reduced power or limp mode
Hard starting or stalling in some cases

Common causes

Most likely first

Faulty fuel pressure sensor BLikely
Open, shorted, or corroded wiring or connector at the sensorCommon
A genuine fuel-pressure problem (weak pump, clogged filter, restricted line) making the reading implausibleCommon
Faulty ECM/PCM (rare)Less often

How to diagnose & fix

Work through it in order

Read freeze-frame data and compare the sensor's pressure reading to a mechanical gauge or known value.
Inspect the sensor connector and wiring for damage or corrosion.
If pressure is genuinely wrong, check the fuel filter, pump output, and lines.
Replace the sensor if it reads out of range with good wiring and correct actual pressure.
Clear and retest.

FAQ

Quick answers

Is it safe to drive with P018B?+

Only cautiously. A bad fuel-pressure signal can put the engine into reduced power or cause stalling, so it's best to diagnose it before depending on the car.

Can I just clear P018B?+

It returns while the reading stays implausible. Either the sensor and its wiring, or a real fuel-pressure problem, has to be fixed first.

Read & clear P018B yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX