DF047

Code

RENAULT D

-> P0560 - Computer supply voltage

Brand: RENAULT

Type: D

Views: UK: 5 EN: 8 RU: 4

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Page language: EN

Causes

Weak or discharged battery
Faulty alternator or voltage regulator (undercharging or intermittent charging)
Corroded, loose or high-resistance battery terminals or cable connections
Bad or missing ground connection(s) between battery, engine block and ECU
Blown fuse(s) or faulty power supply relay for the ECU
Damaged wiring harness or connector to the ECU (short, open, intermittent)

Symptoms

Malfunction Indicator Lamp (MIL) or warning light illuminated
Stored fault DF047 and generic P0560 (computer supply voltage)
Intermittent engine stalling, rough running or loss of driveability
Difficulty starting or no crank/no start when voltage is very low
Dim or flickering lights and electrical accessories
Intermittent loss of communication with modules or CAN bus errors

What to check

Read fault memory and freeze-frame / snapshot data; note conditions when fault set (battery voltage, engine speed, load).
Measure battery resting voltage (engine off) and cranking voltage while starting.
Measure charging voltage at battery with engine running (idle and at ~2000 rpm).
Visually inspect and clean battery terminals, cable ends and ground points; ensure tight connections.
Check ECU main fuse(s) and power relay(s); verify continuity and operation.
Measure voltage at the ECU power supply pin(s) with key ON and engine cranking; compare to battery.

Signal parameters

Battery resting voltage (typical): ~12.4–12.8 V (fully charged).
Cranking voltage (typical minimum acceptable): >9.0 V (varies by manufacturer).
Charging system voltage (engine running): ~13.5–14.8 V.
ECU supply undervoltage threshold that may set P0560: often below ~9–10 V (manufacturer-specific).
System overvoltage condition: sustained voltage above ~16 V is abnormal and can trigger faults.
Acceptable voltage drop between battery positive and ECU power pin when running: low (generally

Diagnostic algorithm

Retrieve all stored codes and freeze-frame data; note whether code is current or intermittent.
Verify battery condition: measure open-circuit voltage, perform a load or battery capacity test; charge or replace battery if weak.
Inspect and clean battery terminals, cable ends and main ground straps; tighten to spec.
With key ON and engine OFF, measure voltage at ECU supply pin(s) and compare to battery voltage; repeat while cranking and with engine running.
Check ECU power fuse(s) and power/ignition relay(s) for continuity and correct operation; replace if faulty.
Inspect wiring harness and ECU connector for corrosion, damaged insulation, chafing or water ingress; repair any faults.
Test alternator output at battery (idle and rev); verify regulator operation. Replace/repair alternator if not within spec.
Perform wiggle test on harnesses/terminals while monitoring supply voltage and watch for code reappearance.
If transient spikes or intermittent faults suspected, monitor ECU supply with a scope during different operating conditions to capture anomalies.
After repairs, clear codes and perform a drive cycle to verify the fault does not return. If persistent and wiring/charging are good, consult OEM service information for ECU-specific tests or consider ECU replacement only after confirming external supply is good.

Likely causes

Low battery state of charge or weak battery
Poor battery/ground connections (corrosion, loose clamp)
Alternator not charging within normal range
Blown ECU power fuse or faulty ECU power relay
Damaged/loose ECU supply connector or wiring harness

Fault status

⚠️ Status

DF047 / P0560 — Computer supply voltage out of range. The engine control module detected its power supply voltage is too low, too high or intermittent. Possible causes include weak battery, poor connections, charging system failure, blown fuses/relay, wiring damage or ECU power fault.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.5 hours

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DF047 — -> P0560 - Computer supply voltage