Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC P2227: BARO Sensor Circuit Range/Performance Problem
- Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).
- If DTC P0107, P0108, P1128, and/or P1129 are stored at the same time as DTC P2227, troubleshoot those DTCs first, then recheck for DTC P2227.
- Turn the ignition switch to ON (II), and wait 2 seconds.
- Check the BARO SENSOR in the DATA LIST with the HDS.
Is about 101 kPa (29.9 in.Hg, 760 mmHg), or about 2.9 V at sea level indicated?
YES -Go to step 3.
NO -Go to step 8.
- Clear the DTC with the HDS.
- Start the engine. Hold the engine speed at 3,000 rpm without load (A/T in P or N, M/T in neutral) until the radiator fan comes on, then let it idle.
- Test-drive under these conditions:
- Engine coolant temperature (ECT SENSOR 1) above 158°F (70°C)
- A/T in D, M/T in 4th
- REL TP SENSOR between 12 deg and 20 deg for 5 seconds
- Monitor the OBD STATUS for DTC P2227 in the DTCs MENU with the HDS.
Does the screen indicate FAILED?
YES -Go to step 7.
NO -If the screen indicates PASSED, intermittent failure, the system is OK at this time. If the screen indicates NOT COMPLETED, go to step 4 and recheck.
- Check the intake air system for clogging or restrictions (foreign material, dirty air cleaner element,etc.)
Is the intake air system clogged or restricted?
YES -Remove the clog or restriction,then go to step 9.
NO -Go to step 8.
- Update the ECM/PCM if it does not have the latest software (see ECM/PCM UPDATE ), or substitute a known-good ECM/PCM (see SUBSTITUTING THE ECM/PCM ).
- Start the engine. Hold the engine speed at 3,000 rpm without load (A/T in P or N, M/T in neutral) until the radiator fan comes on, then let it idle.
- Test-drive under these conditions:
- Engine coolant temperature (ECT SENSOR 1) above 158°F (70°C)
- A/T in D, M/T in 4th
- REL TP SENSOR between 12 deg and 20 deg for 5 seconds
- Check for Pending or Confirmed DTCs with the HDS.
Is DTC P2227 indicated?
YES -Check for poor connections or loose terminals at the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see SUBSTITUTING THE ECM/PCM ), then go to step 9. If the ECM/PCM was substituted, go to step 1.
NO -Go to step 12.
- Monitor the OBD STATUS for DTC P2227 in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM (see ECM/PCM REPLACEMENT ). If any other Pending or Confirmed DTCs were indicated in step 11, go to the INDICATED DTC'S TROUBLESHOOTING .
NO -If the screen indicates FAILED, check for poor connections or loose terminals at the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see SUBSTITUTING THE ECM/PCM ), then go to step 9. If the ECM/PCM was substituted, go to step 1. If the screen indicates NOT COMPLETED, go to step 9.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.