P222F code meaning
Barometric Pressure Sensor A/B Correlation
Powertrain system Generic code P22xx codes Check engine light
What P222F means
P222F is meant for engines with two barometric sensors whose readings should agree but drift apart, without the software being able to say which of the two is wrong. No maker documents this code publicly. GM, the one maker that publishes tables for a sensor B, resolves the comparison differently: it pulls in manifold and boost pressure as further references, singles out the deviating sensor and stores P222B for sensor B or P2227 for sensor A. Ford likewise uses a three-sensor vote for P2227. A pure A/B comparison has no tiebreaker, which explains why the code is rarely seen. CARB requires rationality checks of input sensors. Both sensors, their supply and any leaks in the lines feeding them should be checked.
P222F at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 2.5 hours
- Clears after repairAfter a drive cycle
Symptoms of P222F
- Check engine light
- The two barometric readings differ clearly on the scan tool
Common causes of P222F
- Most likelyOne of the two barometric sensors has drifted
- PossibleSupply or ground offset shifting one sensor's signal
- Less likelyBlocked port or breather of one sensor
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Barometric pressure sensor
What each part of P222F means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 2 | Area: fuel and air metering (injector circuit). |
| 2F | The exact fault in that area. |
What to do next
- Note P222F 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 P222F
What does P222F mean?
P222F means "Barometric Pressure Sensor A/B Correlation". P222F is meant for engines with two barometric sensors whose readings should agree but drift apart, without the software being able to say which of the two is wrong. It is a generic code, so it means the same on every make.
Is it safe to drive with P222F?
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 P222F fail an emissions test?
Yes, it can. P222F 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 P222F to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. This is a job for a workshop.
Will P222F 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.