The largest online repair guide library for every car

About us
Contact support
FAQ
Sign up
Sign in

2020 Forte GT cranks but won't start - no codes!

0

Mike T. · rep 0 · May 25, 2:06 AM · 1 replies · solved · Question

Vehicle: 2020 Kia Forte GT

My 2020 Kia Forte GT, with about 40,000 miles, suddenly won't start this morning. It cranks strong, the battery seems fine, but the engine just won't catch. The weird thing is, I plugged in my OBD-II scanner, and there are no codes showing up, not even pending ones.

It was running perfectly yesterday. I've tried cycling the key a few times, checking the fuel cap, but nothing. Could it be a fuel pump issue even without a code? Or maybe a sensor that's failing without triggering a CEL?

Any ideas on what to check next? I'm stranded and need to figure this out.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 2:06 AM

0

ClearTheCode admin answer: When an engine cranks but doesn't start, the issue typically boils down to one of three things: lack of fuel, lack of spark, or lack of proper compression. Since you're not getting any codes, it points to a more fundamental failure that the ECU isn't detecting as an emissions fault.

Here's how to approach this:

  1. Check for Fuel Pressure: Listen carefully when you turn the key to the 'ON' position (before cranking). You should hear a faint whirring sound from the rear of the car for a couple of seconds – that's your fuel pump priming. If you don't hear it, the fuel pump or its relay/fuse could be faulty. You can also try to smell for fuel at the exhaust while cranking, but this isn't definitive.
    • Common Causes: Failed fuel pump, blown fuel pump fuse, faulty fuel pump relay, clogged fuel filter (less common on newer cars).
  2. Check for Spark: This requires a spark tester or carefully removing a spark plug, grounding it, and having someone crank the engine to observe for spark. If there's no spark, the issue could be with the ignition coils, crankshaft position sensor, camshaft position sensor, or even the ECU itself.
    • Common Causes: Failed crankshaft position sensor (often causes no-start, no-code), faulty ignition coils, main relay failure.
  3. Check Air Intake: Ensure the air filter isn't completely blocked (unlikely to cause a sudden no-start) and that there are no major obstructions in the intake.
  4. Immobilizer System: Modern Kias have an immobilizer. If the key isn't recognized, the car will crank but not start. Look for a security light on the dashboard that stays on or flashes rapidly when trying to start. Try a spare key if you have one.

When to See a Shop:

  • If you've confirmed you have no fuel pressure or no spark, and you're not comfortable diagnosing further (e.g., testing sensors or relays).
  • If the immobilizer light is active, as this often requires dealership-level programming.
  • If you suspect a crankshaft position sensor, as replacing it can be difficult depending on its location.
Menu

Help & account