OBD Guide
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P165D

EWS Data Faulty Release Code Storage

P165D is an OBD-II diagnostic trouble code meaning: EWS Data Faulty Release Code Storage. Common causes: immobilizer (ews) malfunction, damage to the wiring harness between the ews and ecu. Estimated repair cost: $56–222.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–222 (est.)

Symptoms

  • Engine won't start
  • Engine stalls after starting
  • Check engine light comes on
  • Problems with ignition key recognition

Causes

  • Immobilizer (EWS) malfunction
  • Damage to the wiring harness between the EWS and ECU
  • Software error in the control unit
  • Problems with communication between modules
  • Engine control unit malfunction

How to Fix

  1. Check the condition of the wiring harness between the EWS and ECU
  2. Read error codes using a diagnostic scanner
  3. Check the functionality of the immobilizer
  4. Reprogram or replace the EWS unit if necessary
  5. Check and, if necessary, replace the engine control unit

Related codes

P165EP165FP1660

FAQ

What does the P165D code mean?

P165D is an OBD-II diagnostic trouble code that indicates: EWS Data Faulty Release Code Storage

What causes a P165D error code?

The most common causes of P165D include: Immobilizer (EWS) malfunction; Damage to the wiring harness between the EWS and ECU; Software error in the control unit; Problems with communication between modules.

How do I fix a P165D diagnostic trouble code?

To fix P165D: Check the condition of the wiring harness between the EWS and ECU. Read error codes using a diagnostic scanner. Check the functionality of the immobilizer. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P165D?

Do not drive — repair immediately

How much does it cost to fix P165D?

The estimated repair cost for P165D is $56–222. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat