Code
P1014
DACIA
P — Powertrain
Exhaust gas recirculation (EGR) valve - system malfunction
Views:
UK: 3
EN: 7
RU: 4
AI status
Completed
Completed
100%
Causes
- Carbon/clogging in EGR valve or passages
- Stuck or mechanically seized EGR valve
- Faulty EGR position sensor or temperature sensor
- Defective EGR control solenoid / actuator
- Broken, corroded or disconnected wiring or connector to EGR components
- Vacuum supply failure (on vacuum-operated EGR systems)
Symptoms
- Malfunction Indicator Lamp (MIL) illuminated
- Rough idle, hesitation or stalling at low load
- Reduced engine performance or poor throttle response
- Increased fuel consumption and higher NOx/soot emissions
- Black exhaust smoke under load
- Difficulty passing emissions test
What to check
- Read freeze frame data and all stored/related DTCs before clearing
- Compare commanded EGR position vs actual/feedback with scan tool
- Inspect EGR valve, passages and cooler for carbon deposits or blockage
- Check wiring harness and connector for corrosion, damage or poor contact
- Measure voltage/resistance at EGR position sensor and control solenoid
- Verify vacuum supply and hoses (if vacuum-actuated) for leaks or restriction
Signal parameters
- EGR commanded position: 0–100% (idle ≈ 0–10%, part load higher)
- EGR position sensor voltage: typically ~0.5–4.5 V (depends on manufacturer)
- EGR control solenoid voltage or PWM duty: 0–12 V or 0–100% duty (scanner readout important)
- EGR temperature sensor: temperature consistent with expected intake/exhaust temps
- Resistance checks: solenoid coil and position sensor must match factory specifications
Diagnostic algorithm
- Record freeze frame and related codes; clear codes and attempt to reproduce.
- Visually inspect EGR valve, actuator, vacuum lines and wiring/connectors for damage or disconnection.
- Use a diagnostic tool to read live data: commanded vs actual EGR position, EGR temperature/feedback, and solenoid control signal.
- Command EGR open/close with scan tool (active test). Observe valve movement and feedback. If no movement, check actuator/solenoid power and ground at connector.
- For vacuum systems, apply hand vacuum to EGR actuator to verify mechanical operation and vacuum integrity.
- Measure voltages and resistance at the EGR position sensor and control solenoid; compare to specs.
- If the valve moves electrically but flow/feedback is incorrect, inspect and clean EGR passages and cooler. Remove valve if necessary and check for carbon buildup or seized pintle.
- Inspect exhaust side components (DPF, backpressure sensor) that can affect EGR flow and cause false EGR faults.
- Repair or replace defective components (clean or replace EGR valve, replace solenoid/sensor, repair wiring) as indicated by tests.
- After repair, clear codes, perform relearn if required, and road test to confirm fault does not return.
Likely causes
- Heavy carbon buildup preventing EGR valve movement or flow
- Failed EGR valve actuator or control solenoid
- Open/short or poor connection at EGR wiring harness
- EGR position sensor out of range or failed
- Clogged EGR passages or cooler
Fault status
Status
Exhaust gas recirculation (EGR) valve - system malfunction. ECU detected EGR control or feedback outside expected range (flow/position/sensor).
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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