Powertrain
Definition only
Lights the check engine lamp
P27A2: Electric/Auxiliary Transmission Fluid Pump B Control Circuit / Open
Standardized SAE J2012 code · P27xx — Transmission
What does P27A2 mean?
The controller cannot drive the second auxiliary transmission fluid pump.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
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
Common causes
- High Open pump motor winding
- Medium Broken control wire
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P27A2 on the same make and model first.
P27A2 in the community
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