Powertrain
Definition only
Lights the check engine lamp
P2804: Transmission Range Sensor B Circuit Intermittent
Standardized SAE J2012 code · P28xx codes
What does P2804 mean?
The range sensor B signal drops out intermittently. Loose connector or vibration-sensitive solder joint.
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 Sensor connector not seated
- Medium Harness chafing intermittently grounds 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 P2804 on the same make and model first.
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