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My LS430 check engine light came on and I lose power - I was told it was my knock sensors after having a diagnostic test ran - replace both sensors and intake manifold gasket - still have same problem - engine light shuts off and car runs fine - then later - comes back on - PLEASE HELP!!!!!!!!!!!!!!!! LOVE MY CAR BUT WHEN IT LOSES PWER IT REALLY SUCKS - PLEASE LET ME KNOW
Last edited by jbjw2001; 05-25-17 at 05:14 PM.
Reason: NEEDED TO PUT MORE INFO
If you don't have a OBDII reader, stop by your local auto parts store and ask them to read the DTC (Diagnostic Trouble Code) for you. We will need the DTC to help you troubleshoot.
If you bought aftermarket knock sensors that could be your problem. I've had problems with aftermarket knock sensors in the past, they're just not sensitive and quick enough to handle the responsibilities of some cars. If the code tells you knock sensors again, you might want to try OE sensors.
I did have the test done and it said the knock sensors were bad - had them replaced but still have same problem - please help
Please retrieve the DTC from your car. If you get DTC P0325, there is a problem with the left bank knock sensor circuit (the problem can be a loose or cut wire). DTC P0330 indicates problem with the right bank knock sensor circuit. You may have other codes. We need the DTC to troubleshoot.
For the 04-06 LS430, there are additional knock sensor related DTC's...
Please retrieve the DTC from your car. If you get DTC P0325, there is a problem with the left bank knock sensor circuit (the problem can be a loose or cut wire). DTC P0330 indicates problem with the right bank knock sensor circuit. You may have other codes. We need the DTC to troubleshoot.
For the 04-06 LS430, there are additional knock sensor related DTC's...
Ill get the codes and post them as soon as I can tomorrow morning - thank you very much for your help
still looking for answer to check engine light 01 LS430
I had both knock sensors replaced - knock sensor wiring harness - $275 - spark plugs - I was told PO330 bank 2 - I need to go back to make sure - after all that replaced- ran good for 3 hours and back to check engine light on and loss of power - ill get the codes exactly and post back shortly - thanx for any help or advice
Last edited by jbjw2001; 06-04-17 at 11:44 AM.
Reason: wrong word used
I had both knock sensors replaced - knock sensor wiring harness - $275 - spark plugs - I was told PO330 bank 2 - I need to go back to make sure - after all that replaced- ran good for 3 hours and back to check engine light on and loss of power - ill get the codes exactly and post back shortly - thanx for any help or advice
I had both knock sensors replaced - knock sensor wiring harness - $275 - spark plugs - I was told PO330 bank 2 - I need to go back to make sure - after all that replaced- ran good for 3 hours and back to check engine light on and loss of power - ill get the codes exactly and post back shortly - thanx for any help or advice
The knock sensors are located under the intake manifold near the starter. To get to these sensors for replacement, you will have to go through the similar process as shown in the Youtube video below for a GS400.
The two knock sensors cost over $400 (shop around online for better pricing), and labor will probably run another $400. So for $275, I don't think your shop replaced both sensors and wiring harness. Take your car to the Lexus dealer and ask them to diagnose the problem and give you an estimate. You don't have to hire them if you don't like the price.
[QUOTE=rkw77080;9878302]Please retrieve the DTC from your car. If you get DTC P0325, there is a problem with the left bank knock sensor circuit (the problem can be a loose or cut wire). DTC P0330 indicates problem with the right bank knock sensor circuit. You may have other codes. We need the DTC to troubleshoot.
For the 04-06 LS430, there are additional knock sensor related DTC's...
it took awhile but the codes that came up were P0330 knock sensor 2 circuit malfunction bank 2
I replaced both knock sensors - the entire knock sensor wiring harness - spark plugs and mass air flow sensor - car still has same problem - any ideas? going to dealership on 7/6 for a diagnostic
it took awhile but the codes that came up were P0330 knock sensor 2 circuit malfunction bank 2
I replaced both knock sensors - the entire knock sensor wiring harness - spark plugs and mass air flow sensor - car still has same problem - any ideas? going to dealership on 7/6 for a diagnostic - other than that any ideas or help? the mass airflow i replaced was a Denso - $140 - So I was told they are the best - please help - thank you
Please retrieve the DTC from your car. If you get DTC P0325, there is a problem with the left bank knock sensor circuit (the problem can be a loose or cut wire). DTC P0330 indicates problem with the right bank knock sensor circuit. You may have other codes. We need the DTC to troubleshoot.
For the 04-06 LS430, there are additional knock sensor related DTC's...
Sorry to get back so late - it showed that the knock sensor 2 circuit malfunction bank 2 P0330
then it read 010, malfunction, indicator light on - I assume the check engine light - Ive had all 8 spark plugs replaced - both knock sensors - knock sensor wiring harness and mass air flow sensor - all top brands and from dealership except spark plugs - now what??? I still have same problem - Im going to dealership on 07/07 to have $165 diagnostic run - any other ideas before i go there? thanx for any input you have
I am having a similar problem with my LS430. I have it running better but I still have the check engine light on, and only the check engine light(VSC) is working fine. Is your VSC light on as well?
If you have a faulty knock sensor, it's a good idea to use premium until the issue is resolved. I ran my Maxima for 19 years on regular with no adverse effects, but when I had a P0325 3 yrs. ago, I made sure I used premium until I got it addressed. If the work was done at a shop, I would take it back....that's one of the benefits of taking it to a shop over DIY. when I took the Nissan to get a RF brake hose replaced, they were like c'mon now you can easily do this yourself, you already replace calipers and bleed brakes etc. I said yeah but if the line breaks I don't know how and am not equipped to flare new lines. Owner said ok we'll take your money then.
05-25-17, 05:07 PM
check engine light - loss of power
Ill get the codes
