Car keeps stalling codes: P1298 and P0700

Tiny
AKORD
  • MEMBER
  • 1999 HONDA ACCORD
  • 2.3L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 160 MILES
Hi everyone,
I have a Honda accord lx 1999.
the car hard to start and keeps shut off after a minute or so, and when I put load the car shuts off instantly, the engine runs rough and shaking, but when drive it won’t turn off.
no check engine light.


month ago I had a check engine light, and turn signal was working,
codes: P1298, and P0700,
I get the turn signal fixed by reset clock/ECM fuse. Also I changed ELD because I had a stored code p1298. It could be the issue related.
Saturday, November 29th, 2025 AT 8:17 AM

28 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,601 POSTS
Since you already replaced the ELD I would check the main ground from the battery to the engine block and the ground to the chassis. These must be in good shape or you will get this code.

CODE: P1298 - ELD (Electric Load Detector) Circuit High Voltage

1. Failing Alternator (low output or shorted stator)
2. Bad Engine Ground / Battery Cable

Here is a guide to help check the alternator charging, also if the battery is more than 4 year old a would get a new one, or at least have it tested at the auto parts store.

https://www.2carpros.com/articles/how-to-check-a-car-alternator

and

https://www.2carpros.com/articles/car-battery-load-test

P0700 almost always appears when:

1. The PCM is losing stable voltage
2. The electrical system is dropping under load
3. Alternator output is low or intermittent
4. Engine grounds are weak

Please go over these guides and get back to us.
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Monday, December 1st, 2025 AT 9:40 AM
Tiny
AKORD
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Thanks Ken for responding.
After changing the ELD, the stored code P1298 is gone.
Right now, I do not have any pending or stored code.
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Monday, December 1st, 2025 AT 9:58 AM
Tiny
AKORD
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I will try to upload a short video later on.
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Monday, December 1st, 2025 AT 9:58 AM
Tiny
AKORD
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  • 21 POSTS
The hard to start, but when it starts and runs for a few minutes then shuts off.
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Monday, December 1st, 2025 AT 10:56 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,601 POSTS
Thanks for the video, I can hear a vacuum leak which will make it run like this, try to follow the hissing noise to find the leak, it sounds like a vacuum hose is off. Here is a video to help you find the leak, you can use carb spray as well.

https://www.youtube.com/watch?v=LRKWV4Are5c&t

Please go over this guide as well

https://www.2carpros.com/articles/stall-at-idle

Please let us know what happens.
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Tuesday, December 2nd, 2025 AT 9:06 AM
Tiny
AKORD
  • MEMBER
  • 21 POSTS
I have a smoke machine, and I will try it out.
Thanks Ken I appreciate it.
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Tuesday, December 2nd, 2025 AT 11:02 AM
Tiny
KEN L
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Nice! We are close to fixing it :0)
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Wednesday, December 3rd, 2025 AT 9:17 AM
Tiny
AKORD
  • MEMBER
  • 21 POSTS
I changed the air intake hose, which had a crack, but still hard to start, right now I have a pending code P1399.
In first video I hear clicking sounds like spark plug.

Any suggestions?
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Monday, December 8th, 2025 AT 9:00 PM
Tiny
KEN L
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Yep, I hear the ignition system shorting out, also, I have seen the ignition distributor go out and cause this problem as well, I would remove the cap and rotor to look for rust colored dust, if you find it the distributor is bad.

Code P1399 - Random/Multiple Cylinder Misfire.

I would replace the spark plugs, wires, cap and rotor as well. You did see any other vacuum leaks with the smoke machine? Also, I would service the throttle body and IAC motor. These guide can help.

https://www.2carpros.com/articles/throttle-actuator-service

and

https://www.2carpros.com/articles/idle-air-control-valve-service

Please go over these guides and get back to us.

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Tuesday, December 9th, 2025 AT 10:56 AM
Tiny
AKORD
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Thank you.
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Thursday, December 11th, 2025 AT 1:10 PM
Tiny
KEN L
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No worries, let me know if that fixes it ;) Ken
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Friday, December 12th, 2025 AT 8:20 AM
Tiny
AKORD
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Hi Ken,

So I cleaned the EGR and throttle body. Also, I removed the distributor cap, then I tried to start the car but the car just kept cranking. I plugged in the obd2 scanner no codes even the pending code is gone.

I checked the ignition wire’s resistance,
500ohm, 600ohm, 700ohm, 800ohm
From the shortest wire to the longest.
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Sunday, December 14th, 2025 AT 3:59 PM
Tiny
KEN L
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Testing the resistance can still miss a bad wire, but I can see the ignition rotor and cap need to be replaced. Also, did the smoke machine show any leaks? Let me know after the rotos and cap replacement. Ken
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Monday, December 15th, 2025 AT 11:57 AM
Tiny
AKORD
  • MEMBER
  • 21 POSTS
I changed the rotor and cap. I started the car, and it started immediately. But the engine was hesitating, then I did a smoke test, and the new hose I installed was leaking and the EGR was leaking as well.
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Saturday, December 20th, 2025 AT 6:46 PM
Tiny
KEN L
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So, once you got those fixed did it take care of the problem? Also, did you clear the codes and did they come back?
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Sunday, December 21st, 2025 AT 10:48 AM
Tiny
AKORD
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Yes, once I changed the distributor cap and rotor, the car started right away, but the engine sounds like it has a vacuum leak. So I did a smoke test, and the smoke was coming out of the EGR and the new intake hose.
*I am waiting on another intake hose.
**I did not check for DTC.

I believe, the main problem was the distributor cap, does not have continuity between those two points.

I posted a video for EGR.

Thanks Ken, I'm pretty close to return the car to the road again.
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Monday, December 22nd, 2025 AT 11:53 AM
Tiny
KEN L
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Yep, good find, that is a bad cap for sure. I am happy to help you get the car back on the road!
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Tuesday, December 23rd, 2025 AT 9:56 AM
Tiny
AKORD
  • MEMBER
  • 21 POSTS
Hi Ken,

One more question: right now, when the car starts, the RPM is at 2000. Do you think there is still a vacuum leak?

Happy holidays!
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Thursday, December 25th, 2025 AT 3:37 PM
Tiny
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The RPM fluctuates
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Thursday, December 25th, 2025 AT 7:40 PM
Tiny
AKORD
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RPM fluctuating, I will clean IAC valve.
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Thursday, December 25th, 2025 AT 11:01 PM

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