Powertrain
Definition only
Lights the check engine lamp
P283A: Shift Fork B Position Circuit Intermittent
Standardized SAE J2012 code · P28xx codes
What does P283A mean?
Shift fork B position signal drops out intermittently. Loose connector or vibration-sensitive wiring.
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 Connector not seated
- Medium Harness chafing intermittently shorts the wire
- Low Connector with intermittent contact under vibration
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P283A on the same make and model first.
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