ECD SYSTEM, Diagnostic DTC:P2226, P2228, P2229

DTC Code	DTC Name
P2226	Barometric Pressure Circuit
P2228	Barometric Pressure Circuit Low Input
P2229	Barometric Pressure Circuit High Input

DESCRIPTION

The atmospheric pressure sensor, built into the ECM, detects the atmospheric pressure. According to the value of the atmospheric pressure, the ECM corrects the injection timing, the injection volume and the amount of common rail assembly internal fuel pressure for an optimum combustion.

P2226
DTC Detection Drive Pattern	DTC Detection Condition	Trouble Area
Ignition switch ON for 1 second	Open or short in atmospheric pressure sensor circuit (1 trip detection logic).	ECM

P2228
DTC Detection Drive Pattern	DTC Detection Condition	Trouble Area
Ignition switch ON for 1 second	Short in atmospheric pressure sensor circuit (1 trip detection logic).	ECM

P2229
DTC Detection Drive Pattern	DTC Detection Condition	Trouble Area
Ignition switch ON for 1 second	Open in atmospheric pressure sensor circuit (1 trip detection logic).	ECM

INSPECTION PROCEDURE

Note

After replacing the ECM, the new ECM needs registration Click here and initialization Click here.

PROCEDURE

CHECK OTHER DTC OUTPUT

Replace the normal DLC3 cable (12 V specification) for the intelligent tester with the 24 V DLC3 cable.

Note

Be sure to use the 24 V DLC3 cable when connecting the intelligent tester to the DLC3. Using the normal DLC3 cable (12 V specification) will cause damage to the tester.
Connect the intelligent tester to the DLC3.
Turn the ignition switch to ON.
Turn the tester on.
Clear the DTCs Click here.
Turn the ignition switch off and wait for 30 seconds or more.
Turn the ignition switch to ON.
Enter the following menus: Powertrain / Engine and ECT / DTC.

Read the DTCs.

Result

Result	Proceed to
DTC P2226, P2228 or P2229 is output	A
DTC is not output	B

CHECK FOR INTERMITTENT PROBLEMS Click here

REPLACE ECM Click here