OBD Guide
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U1197

Security Seed Response Not Received From ECM/PCM

U1197 is an OBD-II diagnostic trouble code meaning: Security Seed Response Not Received From ECM/PCM. Common causes: engine control module (ecm/pcm) malfunction, wiring harness problems. Estimated repair cost: $167–556.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$167–556 (est.)

Symptoms

  • Check Engine Light Is On
  • Problems starting the engine
  • The car may not respond to the ignition key
  • Intermittent engine operation

Causes

  • Engine control module (ECM/PCM) malfunction
  • Wiring Harness Problems
  • Security system malfunction
  • Software problems
  • Communication circuit malfunction

How to Fix

  1. System diagnostics using a scanner
  2. Checking the integrity of the wiring harness
  3. ECM/PCM Software Update
  4. Replacing the Engine Control Module (ECM/PCM)
  5. Repair only from an authorized dealer

Related codes

U1196U1198B1197

FAQ

What does the U1197 code mean?

U1197 is an OBD-II diagnostic trouble code that indicates: Security Seed Response Not Received From ECM/PCM

What causes a U1197 error code?

The most common causes of U1197 include: Engine control module (ECM/PCM) malfunction; Wiring Harness Problems; Security system malfunction; Software problems.

How do I fix a U1197 diagnostic trouble code?

To fix U1197: System diagnostics using a scanner. Checking the integrity of the wiring harness. ECM/PCM Software Update. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U1197?

Do not drive — repair immediately

How much does it cost to fix U1197?

The estimated repair cost for U1197 is $167–556. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat