Powertrain, generic · Transmission
P07B5 Transmission Park Position Sensor/Switch A Circuit Performance/Low
Check engine lightOn
EmissionsNot relevant
Drive cycleRequired
Limp modePossible
P07B5 means something different at each manufacturer. At GM it covers the P button of the shift-by-wire selector: sensor A reads in the band between its 'released' and 'pressed' zones (53.2–73.7 % of 5 V, ICCM 45–58 %), after two trips. On the Chrysler Pacifica plug-in hybrid it is the park pawl position sensor 1 in the transmission, fixed by software together with park actuator codes. On the 2017–18 Genesis G80/G90 it reads 'park position sensor circuit low' and the park position switch is replaced. In all cases the module cannot reliably determine the park request or position.
Likely causes
P button sensor faulty or worn
Knob not seated, button sticking
Contact resistance in the connector
Module software
Symptoms
- Check engine light, 'service transmission' or 'unable to shift' message
- Park cannot be selected by button, or the car will not shift out of P
- P button illumination off
Repair estimate
DifficultyMediumWorkshop job
Parts and labour€80–600
Time0.5–3 h
Typical range across vehicles; the real cost depends on what the testing finds.
Parts involved
park position sensorelectronic range selectorsensor wiringtransmission control module
Related codes
References: gsi.ext.gm.com, gsi.ext.gm.com, gsi.ext.gm.com, static.nhtsa.gov.