OBD-II code · Powertrain (generic, extended)
P283A Shift Fork B Position Circuit Intermittent
Shift fork B position signal drops out intermittently. Loose connector or vibration-sensitive wiring.
Is it safe to drive with P283A?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyConnector not seated
- PossibleHarness chafing intermittently shorts 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
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 3–10 h
- Emissions test
- Usually unaffected
- Parts involved
- Shift Fork B, Shift Fork Position Sensor B, Wiring Harness
Related codes
- P2835Shift Fork A Position Circuit Intermittent
- P283FShift Fork C Position Circuit Intermittent
- P2844Shift Fork D Position Circuit Intermittent
- P2867Shift Fork E Position Circuit Intermittent
- P2837Shift Fork B Position Circuit Range/Performance
- P2838Shift Fork B Position Circuit Low
- P2839Shift Fork B Position Circuit High
- P283BShift Fork C Position Circuit
- P283CShift Fork C Position Circuit Range/Performance
- P283DShift Fork C Position Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.