Error code P1585 is displayed and the check engine light is on - what does this mean?
The DTC P1585 is a manufacturer-specific fault code that is recognized by the OBD/EOBD diagnostics and indicates a problem with the fuel pump control system. This trouble code occurs when the engine control unit detects a malfunction in the fuel pump control system or its electrical circuit. Depending on the vehicle manufacturer, the exact definition of this fault code may vary slightly.
What causes can this fault code have?
- Defective fuel pump
- Damaged fuel pump relay
- Interrupted or damaged cable connections to the fuel pump
- Defective fuel pump control unit
- Corroded or loose plug connections
- Defective fuel pressure sensor
- Clogged fuel filter
- Faulty ground wire of the fuel pump
- Faulty fuse in the fuel pump circuit
What symptoms occur in parallel with fault code P1585?
- Starting problems: The vehicle is difficult to start or does not start at all
- Engine misfires: Irregular engine running, especially under load
- Loss of power: Reduced engine power while driving
- Jerking: The vehicle jerks or stutters when accelerating
- Engine dies: The engine suddenly stops while driving
- Smell of fuel: Smell of fuel in or around the vehicle
- Unusual noises: Humming or buzzing noises from the fuel tank
How can I fix the problem with error code P1585?
- Repairing error code P1585 requires a systematic diagnosis of the fuel pump system.
- Checking and replacing the fuel pump relay and all associated fuses in the fuse box
- Complete inspection of all cable connections to the fuel pump and repair of damaged or corroded lines
- Replacement of the defective fuel pump including checking the fuel pressure in the system
- Cleaning or replacing the fuel filter and checking the entire fuel supply
- Diagnosis and repair of the fuel pump control unit and checking communication with the engine control unit
- Checking and repairing all ground connections in the fuel pump circuit
- Replacing the fuel pressure sensor and calibrating the system
FAQ - Frequently asked questions about DTC P1585
Can I continue driving with error code P1585?
We strongly advise against continuing to drive with code P1585, as problems with the fuel pump can lead to sudden engine failure. This poses a significant safety risk, especially on the road.
How much does it cost to repair error code P1585?
The repair costs for error code P1585 vary depending on the cause: replacing a relay or fuse costs 20-50 euros, while replacing a fuel pump can cost between 300-800 euros. Cable repairs cost between 100-300 euros.
How can I diagnose fault code P1585 myself?
Start by checking the fuel pump fuse and the relay. Listen for the characteristic buzzing of the fuel pump when you switch on the ignition. If these noises are absent, there is probably an electrical problem.
Is fault code P1585 the same for all vehicles?
No, P1585 is a manufacturer-specific EOBD code, the exact definition of which can vary depending on the car manufacturer. However, most definitions refer to fuel pump problems or related systems.
Can a clogged fuel filter trigger code P1585?
Yes, a severely clogged fuel filter can overload the fuel pump and cause a malfunction that triggers Fault Code P1585. Regular filter replacement is therefore important for system health.
How long does it take to repair fault code P1585?
The repair time depends on the cause: Simple relay or fuse replacements take 30 minutes, while replacing a fuel pump can take 2-4 hours. Cable repairs can take 1-3 hours depending on accessibility.
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