P3002
HV ECU Communication Malfunction
P3002 is an OBD-II diagnostic trouble code meaning: HV ECU Communication Malfunction. Common causes: malfunction of the high voltage control unit (hv ecu), damage to the can bus wiring harness. Estimated repair cost: $167–556.
Symptoms
- Check Engine light comes on
- The car goes into emergency mode
- Reduced engine power
- Problems with charging a high-voltage battery
- Inability to start the hybrid system
Causes
- Malfunction of the high voltage control unit (HV ECU)
- Damage to the CAN bus wiring harness
- Poor contact in connectors
- Control unit power supply problems
- Corrosion or oxidation of contacts
How to Fix
- Check the condition of the wiring harness and connectors
- Check power and grounding of HV ECU
- Scan other modules for communication errors
- If necessary, replace the high-voltage control unit
- Repair only from an authorized dealer
Related codes
FAQ
What does the P3002 code mean?
P3002 is an OBD-II diagnostic trouble code that indicates: HV ECU Communication Malfunction
What causes a P3002 error code?
The most common causes of P3002 include: Malfunction of the high voltage control unit (HV ECU); Damage to the CAN bus wiring harness; Poor contact in connectors; Control unit power supply problems.
How do I fix a P3002 diagnostic trouble code?
To fix P3002: Check the condition of the wiring harness and connectors. Check power and grounding of HV ECU. Scan other modules for communication errors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P3002?
Do not drive — repair immediately
How much does it cost to fix P3002?
The estimated repair cost for P3002 is $167–556. Actual cost depends on your vehicle, location, and labor rates.
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