Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information

Condition
Engine Control Module (ECM) monitors the torque in the engine by reading and interpreting signals from mass air flow sensor, electronic throttle unit and air pressure sensor in the inlet manifold.
The diagnostic trouble code (DTC) is stored if the measured torque exceeds the requested torque, based on the pedal position and the engine speed (RPM).
The diagnostic trouble code (DTC) can be diagnosed in specific driving conditions.

Substitute value
- The engine torque is limited by the throttle position (maximum permitted torque depends on accelerator pedal position).

Possible source
- Air leakage in the intake manifold (downstream of the mass air flow (MAF) sensor and electronic throttle unit).
- Damaged throttle unit.
- Damaged mass air flow (MAF) sensor.
- Damaged engine coolant temperature (ECT) sensor.
- Damaged flywheel sensor.
- Damaged air pressure sensor in the inlet manifold.
- Damaged turbocharger (TC) control valve.
- Damaged boost pressure control (BPC) valve pressure servo.
- Damaged turbocharger (TC).
- Damaged VVT-unit.
- Damaged engine control module (ECM).

Fault symptom[s]
- Driving/Poor performance/lacks power
- Driving/Poor performance/lacks power/At take off
- Driving/Hesitates/surges/Unsure when/at all times
- Driving/Hesitates/surges/During acceleration
- Driving/Hesitates/surges/During deceleration
- Driving/Hesitates/surges/At steady speed