OBD-II code · Powertrain (generic)
P071D Transmission Mode Switch B Circuit
Transmission Mode Switch B Circuit: an electrical fault is present in the circuit.
Is it safe to drive with P071D?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOpen in switch or wiring
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
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.4–1.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Transmission Mode Switch B
Related codes
- P071ATransmission Mode Switch A Circuit
- P078FTransmission Mode Switch C Circuit
- P07CETransmission Mode Switch D Circuit
- P07D1Transmission Mode Switch E Circuit
- P07D4Transmission Mode Switch F Circuit
- P071BTransmission Mode Switch A Circuit Low
- P071CTransmission Mode Switch A Circuit High
- P071ETransmission Mode Switch B Circuit Low
- P071FTransmission Mode Switch B Circuit High
- P0720Output Speed Sensor Circuit Malfunction
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.