P1626 – Audi DTC

Audi DTC P1626 – Data-Bus Powertrain Missing Message from Transmission Control

DTC P1626 meaning on Audi

DTC P1626 on an Audi indicates a Data-Bus Powertrain Missing Message from Transmission Control. This means that there is a communication issue between the powertrain control module (PCM) and the transmission control module (TCM). The PCM is not receiving the necessary data from the TCM, which can lead to various drivability issues.

Audi DTC P1626 symptoms

Symptoms of DTC P1626 on an Audi may include:

• Check Engine Light (CEL) illuminated
• Transmission shifting issues
• Reduced engine performance
• Vehicle may go into limp mode

Audi DTC P1626 causes

The common causes of DTC P1626 on an Audi are:

• Faulty transmission control module (TCM)
• Wiring or connection issues between PCM and TCM
• Software glitches in the PCM or TCM

Audi DTC P1626 seriousness

DTC P1626 should not be ignored as it can lead to further damage to the transmission and engine components. Driving with this fault present can cause unsafe driving conditions and potential long-term damage to the vehicle.

How to diagnose DTC P1626 on Audi

To diagnose DTC P1626 on an Audi, a mechanic will typically perform the following steps:

1. Use a diagnostic scanner to retrieve the fault codes
2. Inspect the wiring and connections between the PCM and TCM
3. Check for any software updates for the PCM and TCM
4. Perform a thorough inspection of the TCM for any signs of damage

How to fix DTC P1626 on Audi

To fix DTC P1626 on an Audi, the following steps may be taken:

1. Repair or replace any damaged wiring or connections between PCM and TCM
2. Update the software in the PCM and TCM to the latest version
3. Replace the transmission control module (TCM) if faulty
4. Clear the fault codes and perform a test drive to ensure the issue is resolved

How to erase DTC P1626 on Audi

To erase DTC P1626 on an Audi, follow these steps:

1. Use a diagnostic scanner to clear the fault codes
2. Perform a test drive to ensure the fault code does not return

Recommended tools for Audi diagnostics

Explore our expert picks: The Best OBD2 Scanners for 2025

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.