Powertrain
generic / SAE
P0861
Gear Shift Control Module A Communication Circuit Low
The gear shift control module A communication circuit reports a communication circuit low condition. Shift command exchange is impaired.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number8 / 61
Possible causes
- Bus wire shorted to ground high
- Module output low medium
- Gateway module routing CAN messages incorrectly low
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 200–1500 €
- Estimated time: 1–5 h
- Component: gear shift control module a
- Component: wiring harness
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012