OBD Guide
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P165E

EWS Data Checksum Error

P165E is an OBD-II diagnostic trouble code meaning: EWS Data Checksum Error. Common causes: ews module malfunction, ecu software problems. Estimated repair cost: $56–167.

Severity
🔴 High
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Engine won't start
  • Engine fault light is on
  • Problems with the immobilizer
  • Intermittent problems starting the engine
  • Lost communication with EWS module

Causes

  • EWS module malfunction
  • ECU software problems
  • Damage to the wiring harness between the EWS and ECU
  • Corrosion or poor contact in connectors
  • EWS module power supply problems

How to Fix

  1. Check the integrity of the wiring harness between the EWS and ECU
  2. Check connections and contacts in connectors
  3. Check the power and ground of the EWS module
  4. Try to reflash the EWS or ECU module
  5. If necessary, replace the EWS module

Related codes

P165FP1660P1661

FAQ

What does the P165E code mean?

P165E is an OBD-II diagnostic trouble code that indicates: EWS Data Checksum Error

What causes a P165E error code?

The most common causes of P165E include: EWS module malfunction; ECU software problems; Damage to the wiring harness between the EWS and ECU; Corrosion or poor contact in connectors.

How do I fix a P165E diagnostic trouble code?

To fix P165E: Check the integrity of the wiring harness between the EWS and ECU. Check connections and contacts in connectors. Check the power and ground of the EWS module. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P165E?

Yes, but get it checked soon

How much does it cost to fix P165E?

The estimated repair cost for P165E is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat