Dec 14, 2015 · Sensor and actuator functions for this and the earlier Cat system. are outlined in Table 6-2. Figure 6-14 shows the location of EMS components on the C-10 and C-12 engines. Sensor location is similar for the C-15, except that boost and intake-manifold pressure sensors are on the left side forward rather than on the right. Electronic unit injector
P1100 codes are for engine vacuum and electrical system concerns. P1105 indicates that the secondary vacuum sensor circuit should be checked. Low vacuum can lead to poor engine performance as a result of restricted airflow. Other P1100 codes can involve the throttle system, coolant, intake air temperature and fuel system errors.