Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-126B

Condition




The engine control module (ECM) checks the signal from the boost pressure sensor.
The diagnostic trouble code (DTC) is stored if the boost pressure sensor signal is within its normal range but the signal is lower than a calculated value from the atmospheric pressure sensor.
The diagnostic trouble code (DTC) can be diagnosed at ignition on and with the engine running.

Substitute value
- Limited boost pressure.

Possible source
- Contact resistance or oxidation in the terminals
- Loose boost pressure sensor
- Damaged boost pressure sensor.

Fault symptom[s]
- Malfunction indicator lamp (MIL) lit
- Poor performance.