OBD-II Code
P2227
Severity
Not yet reviewed
Nobody on our side has assessed this code yet, so we are not going to guess at how serious it is.
Can you drive it
We cannot say
Treat it as unknown until a shop reads it with live data. If the check-engine light is FLASHING, stop driving as soon as it is safe to — that means an active misfire, whatever the code.
Indicative cost (USD)
$150–$1,200
From this code's diagnostic notes. Varies by vehicle, diagnosis, parts, and local labor. This is not a repair quote.
P2227 sets when the barometric pressure (BARO) sensor circuit reports a value within electrical range (so neither P2228 low nor P2229 high) but the reading doesn't change as expected or doesn't make sense given other inputs — typically a frozen reading, a value that drifts implausibly during driving, or a BARO that disagrees with MAP at key-on (the two should read within 1-2 kPa of each other before the engine starts).
How a shop works this
Work from evidence to part, not the other way round. A code names a circuit or a symptom; it does not name the part that failed.
Note every code that is set, not just this one.
Codes that appear together usually narrow the cause faster than any one of them read alone.
Read the freeze frame — the conditions the fault was recorded under.
Cold or warm, idle or load, road speed and engine speed. A fault that only appears cold is a different fault from one that only appears under load, even with the same code on the scanner.
Confirm the fault is current rather than history.
Clear the code and see whether it returns under those same conditions. A code that does not come back may have been logged during a repair, a flat battery, or a bad connection that has since been disturbed.
Then follow the diagnostic notes further down this page, in the order they are written.
They are written in the order a shop works this code, cheapest checks first. Where they name a component, inspect its wiring and connector before replacing it.
If the code comes back after a repair, the underlying fault is still there. That is the point to bring in a scanner with live data and freeze-frame, or a shop that has one.
Common symptoms
- Check engine light
Read the full diagnostic procedureP2227 sets when the barometric pressure (BARO) sensor circuit reports a value within electrical range (so neither P2228 low nor P2229 high) but the r…
P2227 sets when the barometric pressure (BARO) sensor circuit reports a value within electrical range (so neither P2228 low nor P2229 high) but the reading doesn't change as expected or doesn't make sense given other inputs — typically a frozen reading, a value that drifts implausibly during driving, or a BARO that disagrees with MAP at key-on (the two should read within 1-2 kPa of each other before the engine starts). On most modern vehicles the BARO sensor is integrated into the MAP sensor or, more commonly, INTERNAL TO THE PCM/ECM itself — there's no external sensor to replace, the silicon pressure transducer sits on the PCM board with a vent.
Expected behavior
BARO outputs 0.5-4.5V on a 5V reference, scaled at roughly 60-105 kPa total range, typically 95-101 kPa at sea level and dropping to 76-82 kPa at 8000 ft elevation; the value should change smoothly with weather fronts (1-3 kPa over a day) and with altitude (about 1 kPa per 300 ft of climb). Cheapest-first: scan live BARO PID at key-on engine-off and compare to MAP — they should agree within 1-2 kPa. Drive to a different elevation and recheck — if BARO doesn't track altitude change, the sensor or PCM is the suspect. Inspect any external MAP/BARO combination sensor for vent contamination (mud-dauber nests in the reference port are a real failure mode). If the BARO is internal to the PCM, P2227 commonly suggests an internal PCM fault — get a second opinion before quoting a PCM swap.
Vehicle-specific patterns2011-2017 Ford 3.5L EcoBoost (F-150, Flex, Edge Sport) throws P2227 with the BARO sensor internal to the PCM — when the code is set after ruling out…
- 2011-2017Ford 3.5L EcoBoost (F-150, Flex, Edge Sport) throws P2227 with the BARO sensor internal to the PCM — when the code is set after ruling out wiring, it points at the PCM itself, which is a $700-$1,200 repair including programming.
- 2007-2014GM Vortec 5.3L/6.0L V8 trucks share the BARO function with the MAP sensor on the intake manifold — a contaminated MAP reference port (oil from the PCV path coating the silicon diaphragm) throws P2227 as the sensor lags barometric changes; clean or replace the MAP.
- 2008-2013Chrysler 3.6L Pentastar V6 (300, Charger, Town & Country) throws P2227 from a known internal-PCM BARO drift covered under emissions warranty on certain VINs — TIPM and PCM checks are required before quoting parts.
- 2010-2016Toyota 2GR-FE 3.5L (Highlander, RAV4 V6, Sienna) throws P2227 from a contaminated MAP/BARO combination sensor, especially in dusty climates.
Estimated repair$150 to $1,200.
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