Engine General Information and Diagnosis: 1A-173
DTC P2227 / P2228 / P2229: Barometric Pressure Circuit Malfunction
S7RS0B1104078
DTC P2227: Barometric Pressure Circuit Range / Performance
DTC P2228: Barometric Pressure Circuit Low
DTC P2229: Barometric Pressure Circuit High
System Description
Barometric pressure sensor is installed in ECM.
DTC Detecting Condition and Trouble Area
6 Wire harness check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Check for proper connection of ECM connector at “E23-
37”, “E23-52”, “E23-36” and “E23-51” terminals.
3) If OK, measure resistance between “GRN” wire terminal
of APP sensor connector and vehicle body ground,
between “YEL” wire terminal of APP sensor connector
and vehicle body ground.
Is each resistance infinity?
Go to Step 7. “GRN” wire or “YEL”
wire is shorted to other
circuit.
7 Wire harness check
1) Turn ON ignition switch.
2) Measure voltage between “E23-37” terminal of ECM
connector and engine ground, between “E23-36”
terminal of ECM connector and engine ground.
Is each voltage 0 V?
Go to Step 8. “GRN” wire or “YEL”
wire is shorted to other
circuit.
8 APP sensor check
1) Check APP sensor referring to “APP Sensor Assembly
Inspection in Section 1C”.
Is output voltage within specified value?
Substitute a known-
good ECM and recheck.
Replace APP sensor
assembly.
Step Action Yes No
DTC detecting condition Trouble area
DTC P2227:
Difference of barometric pressure value and intake manifold
pressure value is higher than specified value while engine
cranking.
(*2 driving cycle detection logic, monitoring once par driving cycle)
• Manifold absolute pressure sensor
performance problem
• Barometric pressure sensor in ECM
DTC P2228:
Barometric pressure signal less than specified value is detected.
(1 driving cycle detection logic)
• Barometric pressure sensor in ECM
DTC P2229:
Barometric pressure signal more than specified value is detected.
(1 driving cycle detection logic)
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