Powertrain
Definition only
Lights the check engine lamp
P276B: Electric/Auxiliary Transmission Fluid Pump B Motor Supply Voltage Circuit Low
Standardized SAE J2012 code · P27xx — Transmission
What does P276B mean?
The motor supply voltage of the second auxiliary transmission fluid pump is below the operating range.
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 High-resistance battery feed
- Medium Weak battery sags under pump current
- Low Connector pins corroded - high contact resistance
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P276B on the same make and model first.
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