OBD2 code P1003: Manufacturer specific - Engine system
Manufacturer specific code.
Detected Root Component
Powertrain Component
Observed Symptoms
- Engine light on (MIL/Check Engine)
- Loss of engine power
Possible Causes
- Defective sensor
- Damaged wiring
- Faulty engine computer (ECU)
- Obsolete calibration
Tools Required
Interactive Diagnostic
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Diagnostic Result
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Parts likely to be the cause (Moteur (général))
Moteur (général)
Photo d'illustration : Moteur (général)
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Frequently asked questions about code P1003
What does code P1003 mean? ▾
OBD2 code P1003: Manufacturer specific - Engine system. Manufacturer specific code.
What are the symptoms of code P1003? ▾
Code P1003 may cause: Engine light on (MIL/Check Engine), Loss of engine power. The intensity of these symptoms varies depending on the vehicle and driving conditions.
What causes code P1003? ▾
The most common causes of code P1003 are: Defective sensor, Damaged wiring, Faulty engine computer (ECU), Obsolete calibration. A proper OBD2 diagnostic will pinpoint the exact cause.
Is it serious to drive with code P1003? ▾
Code P1003 has moderate severity (Warning). Short-term driving remains possible, but a prompt check is recommended to prevent worsening.
How do I fix code P1003? ▾
Start by reading the code with an OBD2 scanner, then follow the interactive decision tree on this page. Priority causes to check: Defective sensor, Damaged wiring, Faulty engine computer (ECU), Obsolete calibration. Difficulty: complex · Estimated time: 30-60min.