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P1602
System
Powertrain (ECM)
Scanner som krävs
Full-system scanner (engine, ABS, SRS, transmission, service resets)

ECM Has Not Been Programmed

Understand P1602, common causes, and the right TOPDON scanner to diagnose it.

Control module missing calibration or VIN programming.

Vanliga symptom

  • No-start after module replacement
  • Security or immobilizer light

Typiska orsaker

  • New ECM not flashed
  • Used module from donor vehicle
  • Interrupted programming

Vilken scanner behöver du?

Full-system scanner (engine, ABS, SRS, transmission, service resets)

Använd live-data och freeze frame innan du byter delar. ABS-, SRS- och U-koder kräver oftast en fullsystems-scanner.

Diagnostiktips

  • Spara freeze frame när koden först sätts
  • Rensa koden först efter att orsaken är åtgärdad
  • Kontrollera relaterade väntande koder
  • Verifiera batterispänning över 12,4 V innan du misstänker sensorer

Rekommenderade TOPDON-scannrar

Vanliga frågor

What does P1602 mean?
P1602 indicates ecm has not been programmed. Control module missing calibration or VIN programming.
Can I diagnose P1602 with a basic code reader?
P1602 may set in the engine module, but related diagnostics often benefit from an enhanced or full-system scanner with live data and freeze frame.
Which TOPDON scanner do I need for P1602?
Full-system scanner (engine, ABS, SRS, transmission, service resets) See recommended tools on this page.
Is it safe to drive with P1602?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.