P1844

JATCO Fault P1844 - Engine Sensors

P1844 - Engine RPM error flag set.

Possible causes:
1. Engine sensor or ECU problem.
2. JATCO ATCU ECU.

1. Engine sensor or ECU problem.
The JATCO ECU has reported a failure with one or more of:-
- Engine rpm.
- Engine temperature.
- Engine torque reduction.
- Engine throttle angle.
- Engine virtual throttle angle.

- These signals are derived from the Engine Management ECU.
- The fault may be due to the sensor or the Engine Management ECU.
- Read Engine Management ECU fault codes and check if any of the above faults are set.
- If TestBook available, use the Engine Management diagnostics to investigate this fault in more detail.

2. JATCO ATCU ECU.
No detail available for this fault