P2227 The engine computer sees a barometric pressure reading that does not fit the engine load and throttle opening

Barometric pressure sensor range or performance

P2227 in short

P2227 means the engine computer thinks the barometric pressure reading is out of range or does not fit load and throttle. Causes include wiring, a barometric or MAP sensor, a dirty MAF, or on GM turbo engines a charge air cooler with water or ice. Get it checked promptly, and stop if power drops.

Many engines read outside air pressure with a barometric sensor, or use the MAP sensor with the key on. The computer cross-checks that reading against throttle opening and load.

When it does not fit, P2227 sets. TroubleCodes.net lists wiring, a bad barometric or MAP sensor, a contaminated MAF sensor and engine mechanical issues.

Manufacturers have bulletins too. GM ties it to water or icing in the charge air cooler on turbo Equinox, Terrain, Cruze, Silverado and Sierra, and lists ECM reprogramming for the Corvette. FCA lists PCM reprogramming for 2015 Challenger, Charger and 300 V8s.

Most likely causes

  1. Water or ice in the charge air cooler (GM turbo engines)

    Supported by vehicle data
    Why it ranks here
    Three GM bulletins name charge air cooler moisture or icing with P2227, and two Equinox and Malibu owners report it with P0299 and limp mode.
    What would change this
    Likelier on a GM turbo car with P0299, rough running or power loss in cold, humid weather.

  2. Engine computer software

    Supported by vehicle data
    Why it ranks here
    FCA and GM bulletins address P2227 with PCM or ECM reprogramming on 2015 Challenger, Charger, 300 and Corvette.
    What would change this
    Likelier on those models when no sensor or wiring fault is found.
    How to test the engine control module (ecm / pcm)

  3. Barometric or MAP sensor, or its wiring

    Common general cause
    Why it ranks here
    TroubleCodes.net lists wiring and connectors and the barometric or MAP sensor first.
    What would change this
    Likelier if sensor voltage is out of line with outside air pressure with the engine off.

  4. Contaminated MAF sensor

    Common general cause
    Why it ranks here
    TroubleCodes.net lists it. One owner replaced the MAF and MAP without curing the GM turbo power loss.
    What would change this
    Likelier with a dirty element and other airflow codes.
    How to test the mass airflow (maf) sensor

What to test first

Start at step 1. Each result tells you what it means and where to go next.

  1. Read all codes and freeze frame; compare the key-on barometric or MAP reading with local air pressure

    Low riskTool: Scan tool with live data

  2. Inspect the charge air cooler and intake tube for water, and check software update status

    Low riskTool: Visual inspection, dealer software lookup

Symptoms

  • Check engine light
  • Reduced engine power Gets more serious: stop and have it checked.
  • Hesitation on acceleration
  • Higher fuel use
  • Stalling Gets more serious: stop and have it checked.

Compare with: Check engine light with loss of power

How to fix

  1. Check for water in the intake after driving in cold, wet weather, and clear any debris from the MAF and air intake.

Parts and cost context

  • Mass airflow (MAF) sensor:Clean or replace only after other causes are checked. Get a quote.

Labor varies by vehicle and shop; get a quote before you approve a repair.

Compare used part prices on PartPriceGuide

On your vehicle

Cadillac

  • PI1445 (cadillac)Status unverified

    MIL on with P2227

    2013–2015xts · issued · NHTSA 10113763

    MIL on and P2227 set; preliminary information bulletin.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Chevrolet

  • PI1445 (chevrolet)Status unverified

    MIL on with P2227

    2013–2015camaro, impala · issued · NHTSA 10113763

    MIL on and P2227 set; preliminary information bulletin.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

  • 15-NA-059 (chevrolet)Status unverified

    ECM reprogramming for MIL on with P2227

    2015–2016corvette · issued · NHTSA 10137240

    ECM reprogramming for MIL on and P2227.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

  • 18-NA-020 (chevrolet)Status unverified

    Charge air cooler moisture, P0300, P0299/P2227

    2018–2024equinox · issued · NHTSA 10213487

    Replace the charge air cooler for moisture inside it with MIL and P0300 or P0299/P2227.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

  • 22-NA-007 (chevrolet)Status unverified

    CAC icing in extreme cold with P2227 among codes

    2016–2019cruze · issued · NHTSA 10209471

    CAC icing causes poor performance in extreme cold, MIL with P0299, P0234, P0236, P2227, P00C7.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

  • 23-NA-002 (chevrolet)Status unverified

    CAC icing, check engine light, possible P2227

    2019–2023silverado-1500 · issued · NHTSA 10231514

    CAC icing with check engine light and possible P0299, P2227, P0300.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Buick

  • PI1445 (buick)Status unverified

    MIL on with P2227

    2013–2015lacrosse · issued · NHTSA 10113763

    MIL on and P2227 set; preliminary information bulletin.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

GMC

  • 18-NA-020 (gmc)Status unverified

    Charge air cooler moisture, P0300, P0299/P2227

    2018–2024terrain · issued · NHTSA 10213487

    Replace the charge air cooler for moisture inside it with MIL and P0300 or P0299/P2227.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

  • 23-NA-002 (gmc)Status unverified

    CAC icing, check engine light, possible P2227

    2019–2023sierra-1500 · issued · NHTSA 10231514

    CAC icing with check engine light and possible P0299, P2227, P0300.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Dodge

  • 18-016-15 (dodge)Status unverified

    6.2L PCM diagnostic enhancements with P2227

    2015challenger · issued · NHTSA 10144903

    PCM reprogramming for MIL with P0300, P1613 and P2227.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

  • 18-034-15 (dodge)Status unverified

    PCM diagnostic enhancements with P2227

    2015charger · issued · NHTSA 10150545

    PCM reprogramming for MIL with P2227.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

  • 18-035-15 (dodge)Status unverified

    6.4L PCM diagnostic enhancements with P2227

    2015charger · issued · NHTSA 10150547

    PCM reprogramming for MIL with P2227.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Chrysler

  • 18-035-15 (chrysler)Status unverified

    6.4L PCM diagnostic enhancements with P2227

    2015300 · issued · NHTSA 10150547

    PCM reprogramming for MIL with P2227.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

  • P0299Turbocharger or supercharger is producing less boost than the engine computer requested

    Shares causes Supported by vehicle data

    GM bulletins list P0299 with P2227 for charge air cooler icing.

  • P0300Random or multiple-cylinder misfire detected

    Shares causes Supported by vehicle data

    GM bulletins list P0300 with P2227 for charge air cooler moisture.

All Air metering (MAF, MAP and intake air temperature) codes

Sources and review

  1. P2227 Code Definition and Details — TroubleCodes.net
  2. NHTSA complaint 11750044: 2022 Chevrolet Malibu — NHTSA (owner complaint)
  3. NHTSA complaint 11219158: 2013 Ford Focus — NHTSA (owner complaint)
  4. GM 18-NA-020: charge air cooler replacement for moisture (P0300, P0299/P2227) — General Motors / NHTSA
  5. GM 22-NA-007: CAC icing in extreme cold, DTCs P0299, P0234, P0236, P2227, P00C7 — General Motors / NHTSA
  6. GM 23-NA-002: CAC icing, check engine light, possible P0299, P2227, P0300 — General Motors / NHTSA
  7. NHTSA complaint 11714585: 2022 Chevrolet Equinox — NHTSA (owner complaint)
  8. FCA 18-016-15: 6.2L powertrain diagnostic enhancements (P2227 Barometric Pressure Circuit Performance) — FCA US / NHTSA
  9. FCA 18-034-15: Powertrain diagnostic enhancements, P2227 (2015 Charger) — FCA US / NHTSA
  10. FCA 18-035-15: 6.4L powertrain diagnostic enhancements, P2227 (2015 300, Charger) — FCA US / NHTSA
  11. GM 15-NA-059: ECM reprogramming for MIL on, DTC P2227 (Corvette) — General Motors / NHTSA
  12. GM PI1445: MIL on with DTC P2227 (XTS, Impala, Camaro, LaCrosse) — General Motors / NHTSA
Last reviewed
Written by
Saurabh K.
Editorial review
Pending
Technician review
Technician review pending

This page explains what a code usually means; it is not a substitute for a professional inspection. How we source and review · Report an error

My Car

Pick your car and code pages will point out notes and bulletins for it. Saved only in this browser.

Fill this in from your VIN

Used once to identify your engine; not stored.