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Home DTC Codes P0699 Medium · 30-60min
P0699 Critical

OBD2 code P0699: Engine computer - Internal error

Internal engine computer error.

ECU: ECM

Detected Root Component

Powertrain Component

Confidence level: low

Observed Symptoms

  • Engine light on (MIL/Check Engine)
  • Unable to start
  • Dashboard errors

Possible Causes

  • Faulty engin computer (ECU)
  • Discharged or defective battery
  • Alternator not charging
  • Damaged wiring
Diagnostic Progress 0 %
Difficulty Medium
Est. time 30-60min
Tools Required 4 tool(s)

Tools Required

multimeter OBD scanner wiring diagram backprobe pins

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Diagnostic Result

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Parts likely to be the cause (Moteur (général))

Moteur (général)

Moteur (général)

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Frequently asked questions about code P0699

What does code P0699 mean?

OBD2 code P0699: Engine computer - Internal error. Internal engine computer error.

What are the symptoms of code P0699?

Code P0699 may cause: Engine light on (MIL/Check Engine), Unable to start, Dashboard errors. The intensity of these symptoms varies depending on the vehicle and driving conditions.

What causes code P0699?

The most common causes of code P0699 are: Faulty engine computer (ECU), Discharged or defective battery, Alternator not charging, Damaged wiring. A proper OBD2 diagnostic will pinpoint the exact cause.

Is it serious to drive with code P0699?

Yes, code P0699 is critical (Critical). Avoid driving and consult a professional promptly to prevent major damage.

How do I fix code P0699?

Start by reading the code with an OBD2 scanner, then follow the interactive decision tree on this page. Priority causes to check: Faulty engine computer (ECU), Discharged or defective battery, Alternator not charging, Damaged wiring. Difficulty: Medium · Estimated time: 30-60min.