2021-2024 BMW X/5/7 Series Engine Cranks But No Start TSB
A manufacturer communication addresses BMW X/5/7 Series vehicles that crank but fail to start, often due to a lack of communication with the integrated fuel module (TFE) and related fault codes 032B43 and CDA594.
Sarah Mitchell2021 BMW X5
Also applies to
- BMW 530e
- 2021–2023
- BMW 530i
- 2021–2024
- BMW 540i
- 2021–2023
- BMW 740i
- 2021, 2023, 2024
- BMW 740Li
- 2022
- BMW 745e
- 2021
- BMW 745Le
- 2022
- BMW 750e
- 2024
- BMW 750Li
- 2022
- BMW 760i
- 2023–2024
- BMW X1
- 2021–2024
- BMW X5
- 2022–2024
- BMW X7
- 2021–2024
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Some 2021-2024 BMW X Series and 5/7 Series vehicles may experience a condition where the engine cranks but will not start. This problem is frequently associated with a lack of communication with the integrated fuel module (TFE).
Symptoms
Owners may notice that their vehicle's engine will crank but not start. This indicates a failure in the ignition process, preventing the vehicle from running.
Fault Codes / DTCs
When diagnosing this issue with ISTA, technicians may find the following fault codes stored in the Digital Motor Electronics (DME):
| Code | Description | Module |
|---|---|---|
| 032B43 | Low fuel pressure system, electric fuel pump: pressure value too low | DME |
| CDA594 | Message (- 0x33E) missing, receiver DME, transmitter TFE | DME |
Diagnosis
The primary diagnostic finding for this condition is no communication with the integrated fuel module (TFE) when using the ISTA diagnostic system. This lack of communication prevents proper fuel delivery, leading to the engine cranks but no start symptom. The presence of fault codes 032B43 and CDA594 further points to a problem with the fuel pressure system and communication between the DME and TFE.
Owner Action
If your BMW X5 engine cranks no start or you experience similar symptoms, it is recommended to take your vehicle to an authorized BMW service center. Technicians will utilize the manufacturer communication (NHTSA ID 10247567) to properly diagnose the issue, focusing on communication with the integrated fuel module (TFE) and addressing the related fault codes.
Frequently Asked Questions
- What does 'engine cranks but not start' mean for my BMW?
- This means that when you turn the key or press the start button, the engine spins (cranks) as if it's trying to start, but it fails to ignite and run on its own. This indicates a problem with the fuel, spark, or compression systems.
- What do fault codes 032B43 and CDA594 indicate?
- Fault code 032B43 points to a low fuel pressure issue from the electric fuel pump. Fault code CDA594 indicates a missing message from the integrated fuel module (TFE) to the Digital Motor Electronics (DME), suggesting a communication problem with the fuel system.
- What is the integrated fuel module (TFE) and why is it important?
- The integrated fuel module (TFE) is a critical component responsible for managing the fuel pump and ensuring proper fuel delivery to the engine. If there's no communication with the TFE, the engine may not receive the necessary fuel to start, leading to the 'engine cranks but no start' condition.
- How can I get this 'BMW X5 engine cranks no start' issue fixed?
- If your BMW is experiencing this problem, it is best to have it diagnosed and repaired by an authorized BMW service center. They have the specialized diagnostic tools, like ISTA, and access to manufacturer communications (such as NHTSA ID 10247567) to accurately identify and resolve the underlying cause.
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