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Discussion Starter #1
A week ago 2000 Camry 214,000 miles threw code P0300.
Plugs, wires, and injector 4 replaced. Other injectors were also cleaned.
Started it back up, still had misfire. Was running better tho.
Today 2 coil packs and O2 sensor installed.
Started back up and threw codes P0135 P0302 P0304.
Parts came off 2000 Camry in junkyard that had not been wrecked.
Would P0135 cause the other 2 codes to come up?
Where do we go from here?
Thank you for reading this
 

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Depending upon what parts you used from the junkyard, you might have traded one problem for another. Use new plug wires and maybe start looking for a vacuum leak.
 

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Discussion Starter #3
Depending upon what parts you used from the junkyard, you might have traded one problem for another. Use new plug wires and maybe start looking for a vacuum leak.
@OBwan yeah was afraid that might happen, going to put wires we have back on.
Vacuum leaks, best way to find one? Tired of watching hubby struggle and be stressed.
Thank you
 

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Old wires are still old wires. As far as looking for leaks start with a visual inspection of all the hoses and bits they connect to. Look for cracked, brittle or spongy rubber lines. A crack in the intake boot will also mess with the idle by throwing the air fuel mixture off.
 

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Are the parts you pulled labeled denso? If not, you need some. Toyotas in general are temperamental when it comes to aftermarket parts. Have you inspected the spark plug condition? It sounds like the plugs could be wet and the spark plug tube is allowing oil to enter and foul your plugs.
 

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Grenaded piston
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Do you have a V6 or 4 cyl?


P0300 = random misfire detected
P0302 = cylinder 2 misfire detected
P0304 = cylinder 4 misfire detected
P0135 = O2 sensor heater circuit malfunction bank 1 sensor 1 (up stream / pre-cat O2 sensor)

Misfire could be ignition, fuel, mechanical or a combination.


If you still have the O2 sensor check for resistance across the 2 heater wires. Usually 2 wires of the same color. No resistance or OL means open circuit.

Also check for O2 heater circuit voltage on the connector (end coming from car). Use the O2 sensor and how it plugs in to determine which 2 wires to test. Ignition needs to be on for this test.
 

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Discussion Starter #8
Are the parts you pulled labeled denso? If not, you need some. Toyotas in general are temperamental when it comes to aftermarket parts. Have you inspected the spark plug condition? It sounds like the plugs could be wet and the spark plug tube is allowing oil to enter and foul your plugs.
You know not sure about denso or not, will go check. I should say all plugs are new and one injector. Going to try what you and OBwan suggested tomorrow. Been at it all day and now it is way to cold. The reason for the parts from the junkyard car is things are super tight, and normally not my choice.
We had a convertible cavalier that I absolutely loved. One thing turns into another and could not get it running right but would pass smog, weird I think. I dont want this Camry to become a casualty too. I want that V6 back lol
 

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Discussion Starter #9
Do you have a V6 or 4 cyl?


P0300 = random misfire detected
P0302 = cylinder 2 misfire detected
P0304 = cylinder 4 misfire detected
P0135 = O2 sensor heater circuit malfunction bank 1 sensor 1

Misfire could be ignition, fuel, mechanical or a combination.


If you still have the O2 sensor check for resistance across the 2 heater wires. Usually 2 wires of the same color. No resistance or OL means open circuit.

Also check for O2 heater circuit voltage on the connector (end coming from car).
Sorry forgot that part its 4cyl, the P0300 was the first code to pop before doing anything to the car. OL means open circuit, can you explain this? I cant recall reading anything about that in the manual.
Will check tomorrow, thank you
 

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You know not sure about denso or not, will go check. I should say all plugs are new and one injector. Going to try what you and OBwan suggested tomorrow. Been at it all day and now it is way to cold. The reason for the parts from the junkyard car is things are super tight, and normally not my choice.
We had a convertible cavalier that I absolutely loved. One thing turns into another and could not get it running right but would pass smog, weird I think. I dont want this Camry to become a casualty too. I want that V6 back lol
Check with the junkyard to see if they'd take back the parts as credit and see if you can find actual denso parts from a Camry.

Covid has everyone in a hard situation. I've seen videos on YouTube that proves the theory of aftermarket coils versus denso coils in a highlander. The codes reset and ran better. Pretty sure all things being equal, the aftermarket parts are of poorer quality. If you need help, just send me a PM and I will locate a set for you.
 

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Sorry forgot that part its 4cyl, the P0300 was the first code to pop before doing anything to the car. OL means open circuit, can you explain this? I cant recall reading anything about that in the manual.
Will check tomorrow, thank you
OL = open loop

If there's resistance, it can be measured. If you have the repair manual, there is a testing sequence for the o2 sensor.
 

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Discussion Starter #12
Now is a good time to reseal your valve cover with new spark plug tube seals.
That reminds me,
Check with the junkyard to see if they'd take back the parts as credit and see if you can find actual denso parts from a Camry.

Covid has everyone in a hard situation. I've seen videos on YouTube that proves the theory of aftermarket coils versus denso coils in a highlander. The codes reset and ran better. Pretty sure all things being equal, the aftermarket parts are of poorer quality. If you need help, just send me a PM and I will locate a set for you.
Well my husbands boss is friends with the junkyard owner and he called her and bought entire car so he could pull whatever he needed off of it, but will mention that, thank you. Toyotas with parts on them around here a pretty scarce! I totally agree with you on aftermarket! If they are not Denso and not able to find them, will let you know, I appreciate that! Thank you!
 

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Grenaded piston
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Sorry forgot that part its 4cyl, the P0300 was the first code to pop before doing anything to the car. OL means open circuit, can you explain this? I cant recall reading anything about that in the manual.
Will check tomorrow, thank you
Looks like the 4cyl has 2 coils and each coil fires 2 cyls.

Are the coils hooked up correctly? 1 and 4 on one coil. 2 and 3 on the other.

Some dmm (digital multimeter) will display OL when theres no resistance, indicating open circuit.
 

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Grenaded piston
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I've seen videos on YouTube that proves the theory of aftermarket coils versus denso coils in a highlander. The codes reset and ran better. Pretty sure all things being equal, the aftermarket parts are of poorer quality.
I agree. (y)

Denso ignition parts is OE for Toyota.

Nevermind the coils, I've seen weird things happen with the wrong sparkplugs. Personally I only use Denso or NGK plugs on Toyotas and other asian vehicles.
 

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Discussion Starter #17
Looks like the 4cyl has 2 coils and each coil fires 2 cyls.

Are the coils hooked up correctly? 1 and 4 on one coil. 2 and 3 on the other.

Some dmm (digital multimeter) will display OL when theres no resistance, indicating open circuit.
yes 1423 triple checked
 

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Discussion Starter #18
I agree. (y)

Denso ignition parts is OE for Toyota.

Nevermind the coils, I've seen weird things happen with the wrong sparkplugs. Personally I only use Denso or NGK plugs on Toyotas and other asian vehicles.
these plugs
315069
 

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Does the decal under hood say California Emissions?
If so, the O2 sensor is totally different than a non California car.
The CA sensor is a actually a "fuel ratio sensor" and outputs different voltage signals than a O2 sensor.
The wrong one will cause engine to run really bad misfire etc.
The sensor for CA cars is more expensive too.
So check that the cars have the same emissions info both CA or both Federal emissions.

The tire size is on a decal inside the door jamb.
 
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