Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-903C

Condition
This diagnostic trouble code is for informational purposes only. The diagnostic trouble code's only purpose is to inform that the reconfiguration, which may affect the emission system, has been active or is active. The diagnostic trouble code is always stored as the result of another trouble code. Troubleshooting is not required.
Also for upgraded software, released during year 2006 or later, this diagnostic trouble code is used as an information diagnostic trouble code. The diagnostic trouble code will only, however, be stored in case the substitute value, throttle shut, is or has been activated. The diagnostic trouble code is always stored as the result of another trouble code. Troubleshooting is not required. This applies to, for example, diagnostic trouble codes ECM-9150, ECM-9160, ECM-9190, ECM-91A7 or ECM-91B7.
Identifying upgraded software ECM/ETM Identifying Upgraded Software ECM/ETM

Note! For upgraded software, released during 2006 or later. There are certain instances when diagnostic trouble code ECM-903C is stored without another diagnostic trouble code that describes why the substitute value, throttle shut, is active or has been activated. If this is the case, try replacing the throttle unit.

Substitute value
- None.

Possible source

Faulty signal:
- other diagnostic trouble code (DTC) is stored.
This diagnostic trouble code is generated in combination with other trouble codes. Information on the possible root cause is described.

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
- Cruise control/Does not engage
- Text window and warning symbol/Red symbol and text message
- Idling/Uneven idle
- Warning lights and chimes/Electronic Throttle System (ETS) indication/no indication
- Warning lights and chimes/Malfunction Indicator Light ("Check engine" light) indication/no indication