P2831 moderate

Gear Shift Fork 1 Position Circuit

The P2831 code means the vehicle's onboard diagnostic system has detected: Gear Shift Fork 1 Position Circuit. This is a moderate severity code.

My Garage →
Keep driving?
No — stop driving
DIY difficulty
hard
Estimated cost
$300 - $1,200 (parts and labor)
ANCEL AD310 OBD-II Scanner
Check Your Fluid First
ANCEL AD310 OBD-II Scanner

Read and clear transmission codes. Many trans codes are caused by low or burnt fluid -- check level and color before assuming the worst.

Check Price on Amazon
LAUNCH CRP123X (Reads All Systems)
Read Transmission Codes
LAUNCH CRP123X (Reads All Systems)

Basic scanners only read engine codes. This reads transmission, ABS, and airbag too.

Check Price on Amazon

Affiliate links — we earn a commission at no extra cost to you.

Common Symptoms

  • Transmission stuck in one gear
  • Harsh or delayed shifting
  • Check Engine Light on
  • Transmission warning light illuminated

Probable Causes (Ranked by Likelihood)

  • Faulty gear shift fork 1 position sensor Very High
  • Damaged wiring to shift fork actuator High
  • Corroded connector at the turbo actuator Moderate
  • TCM internal circuit fault Low

Frequently Asked Questions

What is a gear shift fork position sensor?

The gear shift fork position sensor monitors the position of shift fork 1 within the transmission, allowing the TCM to verify correct gear engagement.

Can I drive with this code?

No, driving is not recommended as the transmission may not shift properly, leading to further damage or unsafe conditions.

Is this common in dual-clutch transmissions?

Yes, shift fork position codes are most common in dual-clutch and automated manual transmissions where shift fork actuators see heavy use.

Mechanics Guide Step-by-step diagnosis

Step-by-Step Diagnostic Procedure

  1. Scan for DTCs and freeze frame data

  2. Inspect shift fork 1 position sensor connector

  3. Measure sensor resistance and compare to specs

  4. Check wiring continuity between sensor and TCM

Sources 1

This page is built from documented references. Verify against your own service info before repair work.

  • SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)

Commonly Affected Vehicles

  • 2012-2020 Ford Focus (PowerShift)
  • 2010-2018 Volkswagen Jetta DSG
  • 2013-2020 Hyundai Elantra DCT
  • 2015-2020 Kia Soul DCT

Related Codes

P2830P2832

Explore More

Search codes Vehicle-specific fixes Guides By make

Was this helpful?

Send this to whoever is fixing the car — your mechanic, or the person asking what the light means.

Browse by symptom → Read repair guides → Fixes by vehicle →