P1841

DTC P1841
CAN bus monitoring.

Possible causes by suggested order of priority:
- Petrol Only - Connector(s) EAT C193,C637.
- Diesel Only - Connector(s) EAT C193,C158.
- Petrol Only - Open circuit C193/16 (W) to C637/36 (W).
- Diesel Only - Open circuit C193/16 (W) to C158/35 (W).
- Petrol Only - Open circuit C193/44 (Y) to C637/37 (Y).
- Diesel Only - Open circuit C193/44 (Y) to C158/32 (Y).
- Faulty transmission ECU.
- Faulty engine management ECM.

Petrol Only - Connector(s) EAT C193,C637.
- Check for connector not correctly latched, backed out pins, damaged pins, corroded pins

Diesel Only - Connector(s) EAT C193,C158.
- Check for connector not correctly latched, backed out pins, damaged pins, corroded pins

Petrol Only - Open circuit C193/16 (W) to C637/36 (W).
- Check resistance > 1M Ohm

Diesel Only - Open circuit C193/16 (W) to C158/35 (W).
- Check resistance > 1M Ohm

Petrol Only - Open circuit C193/44 (Y) to C637/37 (Y).
- Check resistance > 1M Ohm

Diesel Only - Open circuit C193/44 (Y) to C158/32 (Y).
- Check resistance > 1M Ohm

Faulty transmission ECU.
CHECK THE FOLLOWING:
- Ensure that the open circuit checks have been carried out.
- Check transmission ECU by substitution with a known good unit.
POSSIBLE FAULTS
- Faulty transmission ECU.

Faulty engine management ECM.

CHECK THE FOLLOWING:
- Ensure that the open circuit checks have been carried out.
- If TestBook available, carry out diagnostic checks on ECM.
- Check ECM by substituting a known good unit.
POSSIBLE FAULTS
- Faulty ECM.