Powertrain
Definition only
Lights the check engine lamp
P273C: Gear Shift Control Module A Supply Voltage Low
Standardized SAE J2012 code · P27xx — Transmission
What does P273C mean?
The shift-by-wire gear shift control module A reports a supply voltage 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 Weak battery sags voltage under load
- Medium Alternator output below regulation point
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P273C on the same make and model first.
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