P0689ECM/PCM Power Relay Sense Circuit Low
⚙️ Powertrain (Motor y Transmisión)
The ECU detects its own low voltage.
Compatible with:🚗 Gas/Diesel🔋 Hybrid
🚨
Can I keep driving? NO
STOP the vehicle in a safe place. Continuing to drive may cause serious engine damage or put your safety at risk.
Sistema Afectado
Motor · Powertrain
La falla pertenece al grupo motopropulsor (motor y gestión electrónica).
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Symptoms You Will Notice
What you may observe when this code appears
- No start
- Abnormal operation
Possible Causes
The components or conditions that trigger this code
- 1Low battery
- 2Faulty alternator
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How to Fix It — Step by Step
Recommended diagnostic and repair procedure
- 1Charge the battery
- 2Check the alternator
Note: This information is for general reference. For precise diagnostics and safety repairs, always consult a certified mechanic.
Estimated Cost
Approximate range in USD (varies by region and shop)
$100—$800
Varies by diagnosis
* Diagnosis only: $50–$150
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Quick Info
CodeP0689
CategoryMotor (P)
ManufacturerGeneric (SAE)
SeverityCrítica
Symptoms2
Causes2
Solution steps2
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