AutoCodes – BMW – P165E BMW

P165E BMW Code - EWS Data Checksum Error

Quick Answer

The Digital Motor Electronics (DME) monitors the EWS (Electronic Immobilizer). Common causes include Faulty Digital Motor Electronics (DME), Digital Motor Electronics (DME) harness is open or shorted, Digital Motor Electronics (DME) circuit poor electrical connection. 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: P165E BMW indicates EWS Data Checksum Error.
Common causes: Common causes include Faulty Digital Motor Electronics (DME), Digital Motor Electronics (DME) harness is open or shorted, Digital Motor Electronics (DME) circuit poor electrical connection.
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.

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Code Popularity 2,004

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jan 05, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P165E BMW Description

The Digital Motor Electronics (DME) monitors the EWS (Electronic Immobilizer). The DME sets the OBDII code when the EWS (Electronic Immobilizer) is not to factory specifications.

OBDII Code P165E BMW - EWS Data Checksum Error - AutoCodes.com — P165E BMW Code - EWS Data Checksum Error

What does this mean?

What are the Possible Causes of the DTC P165E BMW?

Faulty Digital Motor Electronics (DME)
Digital Motor Electronics (DME) harness is open or shorted
Digital Motor Electronics (DME) circuit poor electrical connection
EWS (Electronic Immobilizer) data

How to Fix the DTC P165E BMW?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P165E BMW code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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Need more information on how to fix the P165E BMW code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P165E BMW code diagnosed by a professional: Find a repair shop in your area

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 P165E BMW Code

1. What does the OBDII code P165E mean on a BMW?

P165E indicates an "EWS Data Checksum Error," which refers to a communication or data integrity issue between the Engine Control Module (ECM) and the Electronic Immobilizer System (EWS).

2. What are the common symptoms of a P165E code on a BMW?

Symptoms may include difficulty starting the engine, the engine cranking but not starting, the immobilizer warning light illuminating, or intermittent starting issues.

3. What causes the P165E code to appear on a BMW?

Common causes include a fault in the EWS module, damaged or corrupted data in the EWS-ECM communication, a failing key, wiring issues, or software glitches in the control modules.

4. Can a weak car battery trigger the P165E code on a BMW?

Yes, a weak or failing battery can cause communication errors between the EWS and ECM, potentially triggering the P165E code.

5. How is the P165E code diagnosed on a BMW?

A technician will use a diagnostic scanner to confirm the code, inspect the EWS and ECM for faults, check the wiring and connectors, and possibly test the key for proper signal transmission.

6. Can I drive my BMW with a P165E code?

Driving with a P165E code may not be possible if the immobilizer system prevents the engine from starting. Even if the car starts, addressing the issue promptly is recommended to avoid further complications.

7. How can the P165E code be fixed on a BMW?

Repairs may include reprogramming or syncing the EWS and ECM, replacing a faulty EWS module, fixing wiring or connector issues, or replacing the key if itâ€™s not transmitting the correct signal.

8. Does the P165E code require reprogramming the EWS or ECM?

In many cases, reprogramming or re-synchronizing the EWS and ECM is necessary to resolve the P165E code, especially if the issue is caused by corrupted data.

9. Can a damaged key fob cause the P165E code on a BMW?

Yes, a damaged or improperly coded key fob can fail to communicate with the EWS module, triggering the P165E code.

10. How much does it cost to repair a P165E code on a BMW?

Repair costs depend on the specific issue but can range from $100 to $500 for diagnostics, reprogramming, or minor repairs. Replacing the EWS module or key may increase costs.