The P071D: Transmission Mode Switch ‘B’ Circuit refers to an issue with the transmission mode switch B circuit, which controls specific transmission modes like sport, manual, or eco modes. A malfunction can result from a faulty switch, wiring problems, or electrical faults, leading to incorrect or failed transmission mode selection.
P071D – Quick Overview
| Code | Information |
|---|---|
| Meaning | P071D: Transmission Mode Switch ‘B’ Circuit |
| Is it serious? | Yes, as it can affect the transmission’s ability to switch between modes, potentially causing drivability issues. |
| Possible causes | – Faulty transmission mode switch B – Wiring issues – Electrical faults |
| How to diagnose? | – Inspect and test transmission mode switch B – Check wiring and connectors – Replace switch if faulty |
P071D Meaning
The P071D code is triggered when there is a malfunction in the transmission mode switch B circuit. This switch allows the driver to select transmission modes, and a fault in this circuit may prevent the proper selection or function of transmission modes, leading to drivability concerns.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for additional codes related to the transmission mode switch B circuit, which may offer further diagnostic insights. | OBD-II Scanner |
| Inspect Transmission Mode Switch B | Visually inspect transmission mode switch B for physical damage or signs of wear. Test the switch to ensure it is functioning correctly. | Multimeter, Diagnostic Tool |
| Inspect Wiring and Connectors | Check the wiring and connectors associated with the transmission mode switch B for any signs of damage, corrosion, or loose connections. | Flashlight, Multimeter |
| Test the Switch Circuit | Use a multimeter to test the voltage and signal consistency in the transmission mode switch B circuit. Compare the results to manufacturer specifications. | Multimeter |
| Replace the Switch if Necessary | If the transmission mode switch B is found faulty or not operating within specifications, replace it to restore proper transmission mode functionality. | Replacement Parts, Standard Tools |
| Clear Code and Retest | After repairs, clear the P071D code using an OBD-II scanner and test the vehicle to ensure the issue is resolved. | OBD-II Scanner |
| Recheck for Codes | After the test drive, re-scan the vehicle to ensure the P071D code has not returned. | OBD-II Scanner |
OBD-II scanner Buyer’s Guide
- Scanner features explained
- Different types of scanners
- Scanners for coding/odometer/ECU/checks
- Best picks + discount codes
I test OBD-II scanners and make DIY Engine diagnostics guides to help you solve your car problems without having to depend on the mechanic. A lot of them will try to scam you or are just no help at all. About Juraj Lukacko