P2E16 Intermediate Shaft Selection Actuator Position Sensor Range/Performance
P2E16 flags a position reading from the intermediate shaft selection actuator that is electrically valid but not credible, for example a travel that does not match the commanded movement or the learned end stops. No manufacturer documents P2E16 publicly. Why learned references matter is explained in Ford's DPS6 dual-clutch summary from 2012: its clutch actuators sense motor position with Hall elements that only count steps, so the system must sweep from one end stop to the other to know the absolute position. If counts are lost or the mechanism no longer reaches its stops, the computed position drifts away from reality. GM judges plausibility of a rod sensor against shaft speeds (P2832 in 23OBDG07). A relearn after battery work or repair may clear the fault; otherwise check the mechanism.
Likely causes
Symptoms
- Harsh, slow or failed shifts involving the intermediate shaft
- Transmission warning, possibly limp mode
- Fault returns until a relearn has been done
Repair estimate
Typical range across vehicles; the real cost depends on what the testing finds.
Parts involved
Related codes
References: newtonnet.co.uk, gsi.ext.gm.com, law.cornell.edu.