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2020 Civic Touring Cranks But Won't Start - No Fuel?

0

Mike T. · rep 0 · May 25, 1:45 AM · 1 replies · solved · Question

Vehicle: 2020 Honda Civic Touring

My 2020 Honda Civic Touring, with about 45,000 miles, suddenly won't start this morning. It cranks strong, the battery seems fine, but it just doesn't catch. It sounds like it's not getting any fuel.

I don't see any check engine lights on, but I haven't tried scanning for pending codes yet. I also noticed the green key light (immobilizer) flashes for a second when I try to start it, but then goes out.

Could this be a fuel pump issue, or maybe something with the immobilizer system? I'm stranded and need to figure out what to do. Any common issues with these newer Civics causing a no-start condition?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 1:45 AM

0

ClearTheCode admin answer:

A crank-no-start condition on your 2020 Honda Civic Touring, especially with the immobilizer light behavior, points towards a few key areas. Since it cranks, we can likely rule out the battery and starter motor as primary culprits.

Here's a diagnostic approach:

  1. Check for Fuel Pump Operation:
    • Turn the ignition to the 'ON' position (don't try to start). Listen carefully for a brief humming or whirring sound from the rear of the car (under the back seat area). This is the fuel pump priming. If you don't hear it, the fuel pump or its relay/fuse could be faulty.
    • You can also try tapping on the fuel tank while someone tries to start the car, which can sometimes temporarily unstick a failing pump.
  2. Immobilizer System Check:
    • The green key light flashing then going out is normal behavior if the key is recognized. If it stays flashing or blinks rapidly, it indicates the immobilizer isn't recognizing the key, preventing the car from starting. Try your spare key if you have one.
    • Ensure there are no other keys or large metal objects near the ignition that could interfere with the transponder.
  3. Scan for Codes: Even without a Check Engine Light, a scanner might pull pending or historical codes related to fuel system pressure, crankshaft position sensor, or immobilizer issues. A P0606 (ECM/PCM Processor) or P1607 (ECM/PCM Internal Circuit Malfunction) could indicate an ECU problem, though less common.
  4. Fuel Level: A simple check, but ensure you have adequate fuel in the tank. The gauge could be faulty.

Common Causes:

  • Fuel Pump Failure: A common component to fail, leading to no fuel delivery.
  • Fuel Pump Relay/Fuse: A blown fuse or faulty relay can prevent the pump from getting power. Check the fuse box diagram for the fuel pump fuse.
  • Crankshaft Position Sensor: If this sensor fails, the ECU doesn't know when to fire the injectors or spark plugs, leading to a crank-no-start.
  • Immobilizer System Malfunction: While less likely if the light goes out, a rare fault could still be present.

When to See a Shop:

  • If you confirm the fuel pump isn't priming.
  • If you've tried your spare key and the issue persists.
  • If you're unable to diagnose the fuel pump or find any relevant codes yourself. A professional will have specialized tools to test fuel pressure and properly diagnose electrical issues within the starting or immobilizer system.
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