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P2782 OBD2: Downshift Switch Circuit Intermittent/Erratic

P2782 OBD2: Downshift Switch Circuit Intermittent/Erratic

What Does the P2782 Code Mean?

The P2782 code indicates that there is an issue with the downshift switch circuit in vehicles equipped with an automatic transmission that features TAP shifting. This code signifies that the switch is providing erratic or intermittent signals.

What Causes the P2782 Code?

Several factors can trigger the P2782 code, including:

  • Body Control Module (BCM) failure
  • Shift lever assembly failure
  • Wiring issues

What Are the Symptoms of the P2782 Code?

When the P2782 code is present, the most notable symptom is that the TAP shifting function will be disabled. Drivers may also experience difficulty in manually selecting gears.

How Serious Is the P2782 Code?

The P2782 code is classified as urgent since it indicates a malfunction that could lead to severe damage to your vehicle or compromise the safety of the driver and passengers. Immediate attention is recommended.

How to Diagnose the P2782 Code

To diagnose the P2782 code, follow these steps:

  1. Use an OBD-II scanner to confirm the presence of the P2782 code.
  2. Inspect the downshift switch and wiring for any visible damage or disconnections.
  3. Check the Body Control Module and shift lever assembly for faults.
  4. Perform continuity tests on the wiring to ensure proper electrical flow.

Common Repairs for the P2782 Code

Common repairs for the P2782 code may include:

  • Replacing the downshift switch
  • Repairing or replacing damaged wiring
  • Replacing the Body Control Module (BCM)
  • Repairing or replacing the shift lever assembly

How Much Does It Cost to Fix the P2782 Code?

The cost to fix the P2782 code can vary widely depending on the root cause of the issue. On average, repairs can range from $100 to $800, depending on parts and labor costs.

Can I Fix the P2782 Code Myself?

If you have automotive repair experience and the necessary tools, you may be able to address some issues related to the P2782 code yourself. However, for more complex problems, especially those involving the BCM or wiring, professional diagnosis and repair are recommended.

About JC Landry

JC spent 15+ years as a certified Master Mechanic before trading the shop for the keyboard. He's worked across dealerships, owned and operated his own independent garage, and consulted on automotive trade school curricula, reviewing technical textbooks used in vocational programs. He now serves as Editor-in-Chief at eManualOnline.com, where he oversees the platform's technical content. He's one of the few voices in automotive publishing who has actually turned wrenches professionally on the vehicles he covers. He didn't learn automotive repair to write about it. He learned to write after spending over a decade doing it.

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