RX350 Ignition Coil Problem
Thread Starter
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Joined: Jul 2012
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From: TX Texas
RX350 Ignition Coil Problem
To whom it may concern:
I have a 2007 RX 350 2WD. Recently, the check engine light is on, as well we two other lights are on as well: VSC, TRAC OFF.
I went to Lexus and was told that the error code is P0356. I was told that the ignition coil F is problematic and need replaced. I was quoted 1 and 1/2 hours two 2 hours work and need $412 for the repair. Well, I went to auto zone and was told that No 2, 4, 6 ignition coils were on outside so that it would only take about 5 minutes to replace the problematic one with a new one.
I did the replacement indeed by myself after buying a new ignition coil. Initially it was fine and the light went off after a little while. However, after about 10 days, those three lights went back again. I check the ignition coil, it seems fine and I was told that it is very unlikely for a new ignition coil to go bad this quickly.
I was told that I may need to check my spark plug as well. BTW, when I start the car, the car is a little bit shaky.
Do anyone have any idea what is going on or have any suggestion what I need do next?
I have a 2007 RX 350 2WD. Recently, the check engine light is on, as well we two other lights are on as well: VSC, TRAC OFF.
I went to Lexus and was told that the error code is P0356. I was told that the ignition coil F is problematic and need replaced. I was quoted 1 and 1/2 hours two 2 hours work and need $412 for the repair. Well, I went to auto zone and was told that No 2, 4, 6 ignition coils were on outside so that it would only take about 5 minutes to replace the problematic one with a new one.
I did the replacement indeed by myself after buying a new ignition coil. Initially it was fine and the light went off after a little while. However, after about 10 days, those three lights went back again. I check the ignition coil, it seems fine and I was told that it is very unlikely for a new ignition coil to go bad this quickly.
I was told that I may need to check my spark plug as well. BTW, when I start the car, the car is a little bit shaky.
Do anyone have any idea what is going on or have any suggestion what I need do next?
Lexus Test Driver
Joined: Aug 2009
Posts: 5,724
Likes: 114
From: NJ
Welcome to Club Lexus!
The car is shaking because the RX is misfiring. Take it to Auto Zone and get the code read again, and see if it's the same code.
Who manufactured the coil? I suggest sticking with OEM, (i.e. Denso).
The car is shaking because the RX is misfiring. Take it to Auto Zone and get the code read again, and see if it's the same code.
Who manufactured the coil? I suggest sticking with OEM, (i.e. Denso).
Thread Starter
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Joined: Jul 2012
Posts: 37
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From: TX Texas
It is the same code: P0356.
For the ignition coil, I get a brand new one from pepboys. It is BWD brand.
Auto zone guy said that it is unlikely for a brand new one goes bad this quickly. Actually, I unscrewed it today and have a look at the ignition coil I replaced about 10 days ago. It seems to be fine.
Could it be the spark plug problem?
For the ignition coil, I get a brand new one from pepboys. It is BWD brand.
Auto zone guy said that it is unlikely for a brand new one goes bad this quickly. Actually, I unscrewed it today and have a look at the ignition coil I replaced about 10 days ago. It seems to be fine.
Could it be the spark plug problem?
Lead Lap
Joined: May 2006
Posts: 3,999
Likes: 37
From: FL
Try rotating the coils to see if the problem follows to the new location. If coil F is the problem, move one of the others to this location. Drive for a bit to see if the error code comes back. If it does, see what the new code is and if the error is the same as before or not. If the same you can rule out the coil and look at the plug or elsewhere.
Thread Starter
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Joined: Jul 2012
Posts: 37
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From: TX Texas
After replacing with the new coil, I did NOT clear the code though. Is that the problem?
However, those lights indeed disappeared after I did the replacement about 10 days ago even though I did not clear the code using the scanner.
I can do the switch to test whether the new coil is good. However, is this necessary though? Thanks.
However, those lights indeed disappeared after I did the replacement about 10 days ago even though I did not clear the code using the scanner.
I can do the switch to test whether the new coil is good. However, is this necessary though? Thanks.
Try rotating the coils to see if the problem follows to the new location. If coil F is the problem, move one of the others to this location. Drive for a bit to see if the error code comes back. If it does, see what the new code is and if the error is the same as before or not. If the same you can rule out the coil and look at the plug or elsewhere.
Thread Starter
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Joined: Jul 2012
Posts: 37
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From: TX Texas
Just now, I cleared the code twice and it went back right away. So I do not think that is the problem. It seems indeed it has some problem either with the ignition coil or spark plug???
Considering it is a brand new ignition coil, should I go ahead to replace the spark plug there then?
Considering it is a brand new ignition coil, should I go ahead to replace the spark plug there then?
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Lead Lap
Joined: Jul 2009
Posts: 461
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From: VA
Thread Starter
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Joined: Jul 2012
Posts: 37
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From: TX Texas
What do you mean? Can you let me know more?
I just click the wire into this new ignition coil about 10 days ago and it is fine for about 10 days. Now the exactly three lights came back again.
Do you mean I do not insert the wire into the connector properly? Please suggest. Thx.
I just click the wire into this new ignition coil about 10 days ago and it is fine for about 10 days. Now the exactly three lights came back again.
Do you mean I do not insert the wire into the connector properly? Please suggest. Thx.
What do you mean? Can you let me know more?
I just click the wire into this new ignition coil about 10 days ago and it is fine for about 10 days. Now the exactly three lights came back again.
Do you mean I do not insert the wire into the connector properly? Please suggest. Thx.
I just click the wire into this new ignition coil about 10 days ago and it is fine for about 10 days. Now the exactly three lights came back again.
Do you mean I do not insert the wire into the connector properly? Please suggest. Thx.
My other suggestion is go to the forum Toyota Nation and do some digging about this problem on the Avalons, as i believe we share engines. Faulty coils for them are as common as leaking steering racks for us. You may be able to try something your missing.by the way the spark plugs should be fine as they dont need to be changed until 100k-120k miles.