Renault Megane 2 starts and immediately dies: 7 reasons and how to fix the malfunction

Renault Megane II (2002-2009) – a popular car, but with age, its owners often face a problem: the car starts, runs for 1-5 seconds and stalls. This malfunction can manifest itself both on cold and hot, and sometimes accompanied by jerks or trifling. 80% of the time it's the fault sensor, fuel-system or electronicsBut an accurate diagnosis requires a systematic approach.

In this article, we will discuss all possible causes - from the banal to the filter-clogging to complex problems with EBOU (electronic control unit). You will learn how to check each node yourself, what errors the onboard computer gives out when such a malfunction, and when to go for diagnosis. We'll pay special attention. characteristic symptom for Megane 2: the engine stalls after 3-5 seconds after start due to incorrect readings of the crankshaft position sensor (DPKV) This is a common “disease” of the model.

If you Megan. You start and immediately stop, don’t panic. In half of cases, the problem is solved in 10 minutes (for example, cleaning the contacts or replacing the relay). The main thing is to correctly determine the source of the problem.

1. Fuel system: from filter to gas pump

The first thing to check with the "deaf" engine - fuel supply. V Renault Megane II The weaknesses are:

• 🔋 Benzonesus Over time, the net loses productivity or clogs up.
• 🛢️ Fuel filter - is scored after 30-40,000. km (on diesel versions - more often).
• 🔌 Gasoline pump relay - contacts are oxidized or fails.
• 💧 Water in the tank. - especially relevant for cars refueling at dubious gas stations.

How to check:

1. Listen to the pump when the ignition is turned on - there should be a distinct buzzing sound from under the back seat (for 2-3 seconds). If it is not, the pump will not pump.
2. Check the pressure in the fuel ramp: the norm for Megan 2 — 2.8–3.2 bar. If below 2.5 bars - the problem is in the pump or the filter.
3. Check the filter: if it is black or dirt flows from it, a replacement is required.

Listen to the operation of the gas pump when the ignition is turned on |

Check the pressure in the ramp with a manometer |

Check the fuel filter for the blockage |

Check the fuse and pump relay (F3, 15A in the block under the hood)|

Drain some fuel from the tank for water/mud.

It's important! On diesel. Megane 2 (1.5 dCi) frequently fails fuel-cutting-off I'm on the CNVD. Symptom: the engine starts, works 1-2 seconds and stalls, as if "choking". Solution - valve replacement (article) 7701477025).

2. Sensors: DPC, DMRV and lambda probe

Electronics Renault Megane II It is sensitive to sensor malfunctions. The three main “culprits” of sudden jamming:

Sensor.	Symptoms of malfunction	How to check
DPC (crawler positions)	The car starts and dies in 3-5 seconds., error P0335	Call the multimeter (resistance) 500-700 ohms), inspect the damage
DMRV (mass airflow)	Engine Troit, high fuel consumption, error P0100	Disable the sensor – if the car is driving better, the DMRC is faulty
Lambda probe	Deaf on singles, black smoke from the exhaust, mistake P0130	Call the probe heater (resistance) 2-10 Om.)

Nana Megan 2 motorized 1.4 16V (K4J) and 1.6 16V (K4M) most often fails DPC. Its feature is that the sensor can only fail hot (after warming up to 60-80 ° C). If the car starts cold, but stops after a few minutes, it is he who is to blame.

To verify the DIS:

1. Turn off the sensor connector when the engine is running.
2. If the turnovers have grown to 1500–2,000 rpm - DMRV is defective.
3. Inspect the inner surface: if there is an oil plaque, cleaning or replacement is required.

DPKV (kneewall) |

DMPW (air consumption)|

Lambda probe |

Temperature sensor |

The other--

3. Problems with ignition: candles, coils, wires

If Renault Megane II Starts and dies with characteristic "failures" or cotton in the exhaust - the ignition system is to blame. Main reasons:

• ⚡ Ignition coils - 16-valve engines (K4M, F4R) often "pierces" the mass.
• 🕯️ Ignition plugs - wear or incorrect gap (should be 0.9 mm).
• 🔌 High-voltage wires - the contacts are cracked or oxidized.

How to diagnose:

1. Check the candles: if they are black charcoal or butter, replace them.
2. Change the coils: if the cylinder, which used to be a "troil", worked normally - the coil is faulty.
3. Measure the resistance of high-voltage wires: the norm 4-10 kom.

Attention! Nana Megane 2 motorized 1.6 16V (K4M) Often "die" 3rd coil of ignition (counting from the radiator). Symptom: the car starts, works 2-3 seconds with vibration and stalls. Solution - Replacement of the coil (original) Renault 7700500168).

How to check the ignition coils without tools?

Open the hood in the dark and start the engine. If blue sparks ("crown") are visible around the coils, there is a breakdown in the mass. You can also turn off the coil connectors alternately when the engine is running: if the sound has not changed after the shutdown, the cylinder does not work (the coil or candle is to blame).

4. Electronics and ECU: errors, firmware, contacts

If all the mechanical components are in order, Megan 2 It's still a dead end, it's a problem with electronics. Frequent causes:

• 🖥️ EBU errors - for example, P0300 (Multiple ignition gaps).
• 🔌 Oxidized contacts - in the sensor connectors or the control unit itself.
• 📱 Wrong firmware - after chip tuning or software update.

How to proceed:

1. Connect a diagnostic scanner (for example, ELM327) and count the errors. The most critical for Megane 2:
   • P0335 - DPCV;
   • P0100 - DMRV.
   • P0300–P0304 - ignition failures;
   • P0601 - EBU memory error.

Check the voltage on the ECU connector: it should be 12 V contact +B and 0 In on mass.

Check the ECU fee for the presence of bloated capacitors or burnt tracks.

Critical moment! Nana Renault Megane 2 s ECU Siemens Sirius 32/34 Often "fly" firmware after disconnecting the battery. Symptom: the car starts and immediately dies, on the device burns Check EngineThe scanner shows an error. P0601. The solution is to reflash the block (you need a firmware file for your VIN).

5. Immobilizer and alarm: block the start

If Renault Megane II starts and dies in 1-2 seconds, and the icon flashes on the device immobilizer (key) is a problem in the protection system. Possible causes:

• 🔑 The chip in the key is faulty. - worn or damaged.
• 📡 Failure of the immobilizer antenna - around the ignition lock.
• 🔧 Incorrect key synchronization After replacing the battery or the battery.

How to eliminate:

1. Try the second key – if the machine starts, the problem is in the chip of the first.
2. Check the fuse of the immobilizer (F10, 10A in the cabin unit).
3. Restart the sync:

   1. Put the key in the lock.
   2. Turn on the ignition (do not start!).
   3. Wait 10 minutes until the light bulb of the immobilizer goes out.
   4. Turn off the ignition, remove the key.
   5. Repeat the procedure 2-3 times.

Attention! If after replacement of the ECU or battery Megan 2 It does not start – it requires “binding” the keys to the new block. This can only be done with diagnostic equipment (e.g., Clip or DiagBox). Self-attempts to synchronize can block the immobilizer completely!

6. Mechanical malfunctions: HRM, throttle, vacuum

Less often, but accurately: the problem may lie in the mechanics. For Renault Megane II relevant:

• ⚙️ Stretching belt of the GRM - gas distribution phases are lost.
• 🌀 Contaminated throttle - especially on motors. 1.4/1.6 16V.
• 💨 Air suction - through the cracked pipes or the gasket of the intake manifold.

How to diagnose:

1. The HRM belt: Check the match marks on the pulley of the crankshaft and camshaft. If the belt slipped on 1-2 teeth - the engine will start and stall.
2. ThrottleRemove the tube and inspect the valve. If it's dirty, clean it up. carbcliner (Do not use metal brushes!)
3. Air suction: spray with a soapy solution of the intake tract connection with the engine running. If the speed changes, there is a suction.

Nana Megan 2 motorized 1.5 dCi (diesel) often fails GR. Symptoms: the car starts, works intermittently and dies, white smoke comes from the exhaust. The solution is to clean or plug the valve.

7. Diagnostics on sounds and behavior of the engine

Experienced mechanics can determine the cause of the malfunction by how behave Megan 2 at launch. Here are the key symptoms:

Car behaviour	Probable cause	Action
Starts, works 2-3 seconds. And it's deaf (as if it's choking)	Faulty. DPC or fuel-pump	Call the DPC, check the ramp pressure.
It starts with jerks, trots and deafens.	Problems with spark (coils, candles)	Swap the coils, examine the candles
Starts and immediately deafens, on the device flashes the “key”	Failure immobilizer chip-in-key	Try the second key, check the safety lock
It starts only with pressed gas, on singles it deafens.	Polluted. throttle air-suck	Clean the throttle, check the pipes.

If you Megan 2 Behavior differently – describe the symptoms in the comments, and we will help with the diagnosis!

Frequent questions about Megane 2 (FAQ)

My Megane 2 starts and dies in 3 seconds. The scanner shows the error P0335. What do I do?

Mistake. P0335 signify crankshaft position sensor (DPKV). Nana Megan 2 It's a common problem. Decision:

1. Check the sensor circuit: resistance must be 500-700 ohms.
2. Check the connector for oxidation or damage.
3. If the sensor is correct, the problem may be flywheel (Tooths are worn or broken).

The cost of a new DPCV: ~ 1500-2500 rubles. (original) Renault 7700106107).

After washing the engine, the Megane 2 began to start and stall. What's up?

Probably, water is in the sensors or ignition coils. Action:

1. Dry the under-hood space (can be a hairdryer).
2. Remove connectors from DPC, DMRV, ignition coils and treat WD-40.
3. Check the high-voltage wires for cracks.

If the problem didn’t go away, the water might have gone into the water. EBOU (under the glove compartment). In this case, drying or replacement of the block is required.

Megane 2 diesel (1.5 dCi) starts and stops after 1 second. Check what?

On diesel. Megan 2 Most often it is the fault:

• 🔧 Fuel cut-off valve on TNVD (article) 7701477025).
• 🛢️ Air in the fuel system Check the tightness of the tubes from the tank to the TNVD.
• 🔋 Nozzles. If one of them “flows”, the engine will stop.

Start by checking the cut-off valve – it fails in 60% of cases.

Can I drive if Megane 2 starts and dies?

No, it's dangerous! If the car stalls on the move (for example, at an intersection), you risk:

• 🚗 Getting into an accident due to a sudden stop.
• 🔥 Overheat the catalyst (if the problem is ignition).
• 💥 Damage the engine (for example, when the timing belt is slipped).

All allowed sleeve garage or garage (if the problem does not occur constantly).

How much does it cost to diagnose Megane 2 if it starts and stops?

The cost depends on the region and type of service:

• 🔧 Computer diagnostics: 800-1500 rubles.
• 🛠️ Full inspection (fuel + ignition + sensors): 2000-3500 rubles.
• 🔍 Diagnosis of diesel (1.5 dCi): 2500-4000 RUB. (due to the complexity of the TNVD).

Advice: If you have a scanner (for example, a scanner) ELM327 For 500-1000 rubles.), count the errors yourself - it will save time and money.