2022-2024 Audi A4/A5 P008700 P014800 DTC TSB

Owners of 2022-2024 Audi A4, A4 allroad, A5, A5 Cabriolet, and A5 Sportback vehicles may encounter specific warning lights and diagnostic trouble codes (DTCs) related to the engine control module (ECM). Technical Service Bulletin (TSB) 2075223/1, issued on September 17, 2024, provides guidance for technicians addressing these conditions.

This TSB highlights that the presence of DTC P008700 or P014800 in the ECM (J623) requires a specific diagnostic approach, emphasizing communication with Audi's Technical Assistance Center.

Symptoms

Owners may notice one of the following warning messages or indicators in their instrument cluster:

• "MIL / exhaust emission lamp lights up in the instrument cluster."
• "Drive system: malfunction lamp lights up in the instrument cluster."

These warnings typically indicate an underlying issue that triggers the storage of specific fault codes within the vehicle's engine control module.

Fault Codes / DTCs

When diagnosing the symptoms described above, technicians may find one or more of the following Diagnostic Trouble Codes (DTCs) stored in the engine control module (ECM, J623, address word 001):

Code	Description	Symptom Code
P008700	Fuel Rail/System Pressure - Too Low	15058
P008700	Fuel Rail/System Pressure - Too Low	15059
P014800	Fuel Delivery Error	40466

These codes, particularly the Audi A5 P008700 P014800 codes, point to issues with the fuel rail pressure or overall fuel delivery system.

Important Warnings for Owners and Technicians

This TSB includes critical information that both technicians and owners should be aware of:

• Do not replace parts prematurely: The bulletin explicitly states, "Various parts have been replaced under warranty for the condition noted above, but no issues were identified with these parts." It instructs technicians to "contact the Audi Technical Assistance Center (TAC) before replacing any parts." This is crucial to prevent unnecessary and potentially costly part replacements that may not resolve the underlying issue.
• Informational only, not a warranty claim: "This TSB is informational only and not applicable to any Audi Warranty." This means that while the TSB provides diagnostic guidance, it does not automatically authorize warranty coverage for any repairs. Owners should clarify warranty implications with their dealer.
• No production changes: Audi has made "No changes to production have been made, as no issue has been identified," indicating that the manufacturer does not consider this a widespread design or manufacturing defect requiring a production line fix.

Diagnosis and Next Steps

For vehicles experiencing these symptoms and storing the Audi A5 P008700 P014800 DTCs, the diagnostic process outlined in TSB 2075223/1 requires technicians to:

1. Verify the condition: Confirm the presence of the warning lights and stored DTCs.
2. Contact Audi Technical Assistance Center (TAC): If the vehicle is still within its New Vehicle Limited Warranty, technicians must contact a TAC consultant with diagnostic results and photos before proceeding with any repairs. This includes attaching the DTC and diagnostic log, along with photos of test results, to the TAC ticket.
3. Perform specific tests: Technicians are instructed to perform tests such as "Checking fuel delivery rate," "Pressure test in the fuel supply line," and "Checking residual pressure." The results of these tests are vital for TAC consultation.

This process ensures that Audi can gather more information on these specific DTCs and provide targeted guidance for resolution.

Owner Action

If you own a 2022-2024 Audi A4, A4 allroad, A5, A5 Cabriolet, or A5 Sportback and your vehicle displays an "MIL / exhaust emission lamp lights up" or "Drive system: malfunction lamp lights up" warning, it is recommended to schedule an appointment with an authorized Audi dealership. Inform them about the specific warning lights and mention the possibility of DTC P008700 or P014800. Your dealer's service department will follow the guidelines provided in TSB 2075223/1, which includes consulting with Audi's Technical Assistance Center for proper diagnosis and repair.

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Source: NHTSA ID: 11009326