OBD-II code · Powertrain (generic, extended)
P2804 Transmission Range Sensor B Circuit Intermittent
The range sensor B signal drops out intermittently. Loose connector or vibration-sensitive solder joint.
Is it safe to drive with P2804?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySensor connector not seated
- PossibleHarness chafing intermittently grounds the wire
- Less likelyConnector with intermittent contact under vibration
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
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Usually unaffected
- Parts involved
- Transmission Range Sensor B, Wiring Harness, Tcm
Related codes
- P0709Transmission Range Sensor A Circuit Intermittent
- P2801Transmission Range Sensor B Circuit Range/Performance
- P2802Transmission Range Sensor B Circuit Low
- P2803Transmission Range Sensor B Circuit High
- P2805Transmission Range Sensor A/B Correlation
- P2806Transmission Range Sensor Alignment
- P2807Pressure Control Solenoid G
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.