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Engine-Codes – BMW – P165C BMW

P165C BMW Code - EWS Data No Available Storage Possibility

Quick Answer

The P165C BMW code indicates that there is a problem with the Electronic Immobilizer System (EWS) data storage. Common causes include Faulty EWS module, Damaged wiring in the EWS system, Weak or dead battery. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P165C BMW indicates EWS Data No Available Storage Possibility.
Common causes
Common causes include Faulty EWS module, Damaged wiring in the EWS system, Weak or dead battery.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 14, 2024
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Code P165C BMW Description

The P165C BMW code indicates that there is a problem with the Electronic Immobilizer System (EWS) data storage. The EWS is a security feature in BMW vehicles that prevents the engine from starting without the correct key. When this code appears, it means that the EWS is unable to store necessary data, which can lead to starting issues or even prevent the engine from starting altogether.

OBDII Code P165C BMW - EWS Data No Available Storage Possibility
P165C BMW Code - EWS Data No Available Storage Possibility

Common Causes of P165C BMW

  1. Faulty EWS module.
  2. Damaged wiring in the EWS system.
  3. Weak or dead battery.
  4. Software malfunction in the EWS system.
  5. Corrosion or poor connection in the EWS components.

Symptoms of P165C BMW

  1. Engine cranks but does not start.
  2. Inability to start the engine with the correct key.
  3. Security light flashing on the dashboard.
  4. Engine starting intermittently.
  5. Vehicle going into anti-theft mode.

How to Fix P165C BMW

  1. Diagnose the EWS system using a diagnostic scanner to retrieve the specific fault codes.
  2. Check the wiring and connections in the EWS system for any damage or corrosion.
  3. Test the battery to ensure it is providing sufficient power to the EWS system.
  4. If the EWS module is faulty, it will need to be replaced and reprogrammed to match the vehicle's key.
  5. Clear the fault codes and perform a test start to ensure the issue has been resolved.

Cost to Fix P165C BMW

The cost of repairing a P165C BMW code can vary depending on the exact cause of the issue. On average, you can expect to pay between $200 and $500 for parts and labor. Keep in mind that diagnostic time and labor rates can vary, so it's recommended to check with local auto repair shops for a more accurate estimate. Additionally, if the EWS module needs to be replaced, it may require programming, which can incur additional costs.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P165C BMW Code

What does the OBDII code P165C mean on a BMW?

The P165C code on a BMW indicates an issue with the EWS (Electronic Immobilizer) system, specifically that there is no available storage possibility for required data.

What are the symptoms of the P165C code on a BMW?

Symptoms may include the engine failing to start, intermittent starting issues, or the immobilizer light staying on.

What causes the P165C code in a BMW?

The code is typically caused by issues with the EWS system, such as corrupted data, a malfunctioning EWS module, a damaged key, or communication errors between the EWS and the DME (Digital Motor Electronics).

Can a dead key fob battery cause the P165C code?

While a dead key fob battery may prevent the car from starting, it is not the direct cause of the P165C code. The issue usually relates to the EWS system's data handling.

How can the P165C code be diagnosed?

Diagnosis involves scanning with an OBDII tool to confirm the code, checking the EWS module for errors, inspecting wiring and connections, and verifying communication between the EWS and DME.

Can the P165C code cause permanent starting issues?

Yes, if the problem with the EWS system is not resolved, the vehicle may fail to start entirely until the issue is repaired.

Is reprogramming required to fix the P165C code?

In many cases, yes. The EWS module or key may need to be reprogrammed, or the DME and EWS may require synchronization to resolve the issue.

How much does it cost to fix the P165C code on a BMW?

Repair costs vary depending on the issue but may range from $150 to $600, including diagnostics, reprogramming, or replacing the EWS module or key.

Can I fix the P165C code on my own?

Fixing this code requires specialized tools and knowledge of BMW’s immobilizer system. DIY repair is not recommended unless you have experience with BMW diagnostics and programming.

What happens if the P165C code is ignored?

Ignoring the P165C code can lead to complete immobilization of the vehicle, leaving you unable to start the engine until the issue is fixed.

Discuss the causes and fixes for P165C BMW OBDII Code

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