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'05 civic lx no spark [solved]

   
Old Sep 14, 2023
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'05 civic lx no spark [solved]
I have checked fuses and sensors, replaced the crank sensor and still no spark. Initially it was intermittent non starts then nothing. No check engine light, no codes. Any suggestions? The manual says PCM/ECU but I want someone else's opinion before going that route.
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Old Sep 14, 2023
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re: '05 civic lx no spark [solved]
There should be some troubleshooting steps to try before replacing the ecu
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Old Sep 15, 2023
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re: '05 civic lx no spark [solved]
Flashing green key symbol in the cluster?
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Old Sep 15, 2023
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re: '05 civic lx no spark [solved]
Yes I have a flashing green key in the cluster, what does that mean?
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Old Sep 15, 2023
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re: '05 civic lx no spark [solved]
immobilizer
you will need to reprogram your key to ECU
Also, check if any alternator bolts are loose
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Old Sep 15, 2023
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re: '05 civic lx no spark [solved]
There is no fob, this is the key, is there a chip in it? Alternator bolts are tight.

Last edited by Jazzyjessi; Sep 15, 2023 at 09:14 AM. Reason: To include info
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Old Sep 15, 2023
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re: '05 civic lx no spark [solved]
Yes, flashing green key means immobilizer issue. Immobilizer disables fuel pump and spark. Do you have another key you could try?
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Old Sep 15, 2023
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re: '05 civic lx no spark [solved]
call a locksmith, nowadays they have the machines to program.
Unsure, but that key is quite beaten up... might be it?
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Old Sep 15, 2023
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re: '05 civic lx no spark [solved]
Thank you, it is definitely the key, did a temporary immobilizer override (using the key) n she fired right up. Thank you all so much! That "blinking green key" should be the first thing to check when it "cranks but don't start!"
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Old Sep 15, 2023
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Re: '05 civic lx no spark [solved]
glad you found the problem!
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Old Sep 15, 2023
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Re: '05 civic lx no spark [solved]
Originally Posted by Jazzyjessi
That "blinking green key" should be the first thing to check when it "cranks but don't start!"
That's why I asked
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Old Sep 15, 2023
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Re: '05 civic lx no spark [solved]
Just a note...the girl had a bejeweled metal ring on the ignition interfering with the signal to the immobilizer. Hondas can't have those!
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Old Sep 15, 2023
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Re: '05 civic lx no spark [solved]
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