Engine light on

[DavisT]

My 98 camry engine light on and I bring to autozone this week and they gave these code: P0135, P0141, P0155. Someone please tell me what are problems with these codes. (Also, I brought my car to Toyota dealership in Arlington-Texas last year and they told me o2 sensor were bad and they replaced 3 sensors its but the engine light was still on and then they told me that ecm is bad. I give up).
Thank you very much.

[Brian R.]

P0135 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)

P0141 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)

P0155 O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)

Since you've replaced the HO2 sensors, there must be a problem with the heater circuits or the detection of the current in the heater circuits.

In this case, they may be right - bad ECM. That is the only thing I can think of. Hard to believe all the heater circuits went out at the same time.

[DavisT]

Originally Posted by DavisT

My 98 camry engine light on and I bring to autozone this week and they gave these code: P0135, P0141, P0155. Someone please tell me what are problems with these codes. (Also, I brought my car to Toyota dealership in Arlington-Texas last year and they told me o2 sensor were bad and they replaced 3 sensors its but the engine light was still on and then they told me that ecm is bad. I give up).
Thank you very much.

Is it easy to replace ECM and where is ECM locate? Also, where I can get good price ECM? Thank you very much.

[Brian R.]

ECM is best found used at a salvage yard because they are quite expensive. It is normally on the passenger side of the interior inside the kick panel. Easy to replace, it is just an electronic box with a few connectors.

Don't run off and buy one just yet. I may be wrong and you would be wasting money. Wait and see if anyone else has any ideas.

[Mike Gerber]

Have you tried having Autozone clear the codes to see if they return? They could be left over from when the dealership replaced the 3 O2 sensors and forgot (or just didn't bother) to clear the codes from the ECM's memory. They probably will return, but it's worth a try. It would be free except for your time. If the codes return then I'm thinking along the same lines as Brian; bad ECM.

Good luck.

Mike

[Brian R.]

I don't believe he ever needed the three HO2 sensors, so replacing them would have no effect. Codes would still be there if it's the ECM.

[DavisT]

Autozone clear the codes but engine light is back on again. Should I try to replace the ecm?
Thank you very much.

[Devonsmom]

Originally Posted by DavisT

Autozone clear the codes but engine light is back on again. Should I try to replace the ecm?
Thank you very much.

my 1996 toyota Camry engine light came on after a long trip
i have no idea why the car runs fine can anyone help?

[Brian R.]

Originally Posted by DavisT

Autozone clear the codes but engine light is back on again. Should I try to replace the ecm?
Thank you very much.

That's my opinion, but there may be a cheaper solution. See if there is someway of borrowing one to test yours.

[Brian R.]

Originally Posted by Devonsmom

my 1996 toyota Camry engine light came on after a long trip
i have no idea why the car runs fine can anyone help?

Get the codes from the ECM with a OBDII tester. Find out what system is causing the light to be on.

[Mike Gerber]

Originally Posted by Brian R.

Get the codes from the ECM with a OBDII tester. Find out what system is causing the light to be on.

Go to Autozone as the original poster did. They will read the codes for you for free. Then report back here with the codes and someone can probably give you some direction to take to solve your problem.

Mike

[DavisT]

I appreciated your help.

[Devonsmom]

i unplugged my battery and plugged it back now the light is off

[jd4irish]

My grandmother-in-law owns a 2005 Toyota Camry. Recently her check engine light comes on. I know a lot of imports used to install a DIY diagnostic bay that only required a jumper cable and a code sheet to find out what is wrong. Is this still true? If so where is it? and what are the codes?

Thanx!!!

[Mike Gerber]

Originally Posted by jd4irish

My grandmother-in-law owns a 2005 Toyota Camry. Recently her check engine light comes on. I know a lot of imports used to install a DIY diagnostic bay that only required a jumper cable and a code sheet to find out what is wrong. Is this still true? If so where is it? and what are the codes?

Thanx!!!

This is no longer true for OBD2 equiped cars. That is, cars from model year 1996 and newer. However, there is still some good news. If you have Autozone parts stores in your area, you can take the car to them and they will read the code for you for free. If you don't have Autozone in your area, call around to other parts stores and ask them if they offer this free service. Then come back here and post the code and someone will be able to give you some direction. In addition, when you do come back with the code, give us some other information, like which engine and how many miles are on the vehicle, along with anything that has been done lately to the vehicle.

Incidently, if the car is less than 3 years old and has less than 36,000 miles on it, it should still be under warranty. If that is the case, take it back to the dealer and let them deal with the problem.

Mike