OBD-II code · Powertrain (generic)
P071A Transmission Mode Switch A Circuit
Transmission Mode Switch A Circuit: an electrical fault is present in the circuit.
Is it safe to drive with P071A?
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 A
Related codes
- P071DTransmission Mode Switch B Circuit
- P078FTransmission Mode Switch C Circuit
- P07CETransmission Mode Switch D Circuit
- P07D1Transmission Mode Switch E Circuit
- P07D4Transmission Mode Switch F Circuit
- P0717Input/Turbine Speed Sensor Circuit No Signal
- P0718Input or Turbine Shaft Speed Sensor A Circuit Intermittent
- P0719Brake Switch B Circuit Low
- P071BTransmission Mode Switch A Circuit Low
- P071CTransmission Mode Switch A Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.