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2020 Kona 2.0L Cranks But Won't Start - No Engine Firing

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Mike T. · rep 0 · May 25, 1:59 AM · 1 replies · solved · Question

Vehicle: 2020 Hyundai Kona 2.0L SEL

Hi everyone,

I'm having a frustrating issue with my 2020 Hyundai Kona 2.0L SEL. This morning, it just cranks and cranks, but the engine won't actually fire up. It sounds like it's trying, but it just won't catch.

The battery is good; I had it tested, and it's fully charged. I can hear the fuel pump prime when I turn the key to the 'on' position. All the dashboard lights come on as normal, and there are no warning lights staying on besides the usual ones before starting.

I'm not getting any specific OBD-II codes, just the P0000 'no codes' message. Any ideas on what could be preventing it from starting? It was running perfectly fine yesterday.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 1:59 AM

0

ClearTheCode admin answer:

When an engine cranks but doesn't start, it usually points to an issue with one of the fundamental elements required for combustion: fuel, spark, or compression. Since you hear the fuel pump, we can start by investigating further.

Common Causes for Crank-No-Start:

  1. Lack of Spark: Faulty spark plugs, ignition coils, crankshaft position sensor, or camshaft position sensor can prevent spark.
  2. Lack of Fuel Delivery (despite pump noise): While you hear the pump, there could still be issues like a clogged fuel filter, faulty fuel pressure regulator, or clogged fuel injectors preventing fuel from reaching the cylinders.
  3. Immobilizer System Issue: A problem with the car's anti-theft system can prevent the engine from starting, even if it cranks.
  4. Timing Belt/Chain Issue: Though less common on newer vehicles without warning, a broken or jumped timing belt/chain would prevent the engine from running.
  5. Sensor Failure: Sensors like the crankshaft position sensor are crucial for the engine control unit (ECU) to know when to fire the spark and inject fuel.

Diagnostic Steps:

  1. Check for Spark: Remove one spark plug, reattach its coil, ground the plug against a metal part of the engine, and have someone crank the engine briefly. Look for a strong, blue spark. Use caution when handling ignition components.
  2. Check Fuel Pressure: While you hear the pump, actual fuel pressure at the rail is critical. This usually requires a fuel pressure gauge connected to the fuel rail. A mechanic can easily perform this.
  3. Check Fuses and Relays: Inspect fuses related to the fuel pump, ignition system, and engine control. Also, consider swapping relays (e.g., fuel pump relay) with a known good one from a non-critical system.
  4. Look for Security Light: Pay close attention to the dashboard. Is there a security or immobilizer light that stays on or flashes rapidly while cranking?

When to See a Shop:

  • If you confirm there's no spark or no adequate fuel pressure.
  • If the immobilizer light is active, indicating a security system fault.
  • If you're uncomfortable performing the diagnostic steps yourself, especially those involving electrical or fuel systems.
  • A professional can use a diagnostic scanner to check for pending codes, live data from sensors, and perform specific system tests to pinpoint the exact failure.
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