Check Engine Light

jetsfan_00 · 07-06-2008, 02:09 PM

My 05 Prius with 75000 miles started to get check engone light in Jan. I continue to receive the light to date. I can clear the light by removing and replacing my gas cap. I have replaced the gas cap as well. Right now when I ckear the light, it will come back after a day or 2 and will not clear. It clears after I fill it up and only for a day or 2. No change in gas mileage, but having this light will cause the vehicle to fail emissions as my state goes by computer codes and not exhaust gases.

I have talked with my shop and they can determine the error codes, but feel they could not repair. Need to go back to Toyota for a smoke test to fix any problems. This is becoming very common on most newer cars due to the E10 fuel being offered.

Has anyone found a low cost solution? Or do I have to go to the dealer for a smoke test and cost for the repairs.

bwilson4web · 07-06-2008, 03:27 PM

Quote:

Originally Posted by jetsfan_00

My 05 Prius with 75000 miles started to get check ...
I have talked with my shop and they can determine the error codes, but feel they could not repair. ...

What are the codes?

Bob Wilson

jetsfan_00 · 07-08-2008, 05:23 PM

Bob,

Can you help and tell me where this port is located? I have an analyer but do not know where this port is to plug it in.

Cheers,

Tim

doubleg2005 · 07-08-2008, 05:24 PM

is this the same as the maint light? (probably not, eh?) the maint light can be cleared manually quite easily... if that were the case, i would say just clear it manually before the emissions test

ceric · 07-08-2008, 05:30 PM

Quote:

Originally Posted by jetsfan_00

Bob,

Can you help and tell me where this port is located? I have an analyer but do not know where this port is to plug it in.

Cheers,

Tim

Usually you can find the DLC-2 under the steering wheels.
Any ScanGuage type of device allows you to see the codes and clear it if you wish to. Many AutoZone/Kragan shops are willing to read the codes for you for free.

jetsfan_00 · 07-08-2008, 05:55 PM

No, i know how to reset the maintenance light. I have acontinuous check engine light and I cannot find the port to plug the analyer. Toyota claims it is directly under the steering colunm. I have not been able to locate any such port. If hidden, please give me a clue where it is.

jdenenberg · 07-08-2008, 08:00 PM

Quote:

Originally Posted by jetsfan_00

No, i know how to reset the maintenance light. I have acontinuous check engine light and I cannot find the port to plug the analyer. Toyota claims it is directly under the steering colunm. I have not been able to locate any such port. If hidden, please give me a clue where it is.

The OBD2 socket is behind a little door to the left and below the steering column (near your left knee when driving).

JeffD

jetsfan_00 · 07-08-2008, 08:13 PM

I found the port. It was near my Right knee about an inch from the center console.

The error code is P1121. What does this tell me?

Patrick Wong · 07-08-2008, 08:21 PM

DTC P1121 "Coolant Flow Control Valve Position Sensor Circuit Stuck".

The possible trouble areas include the coolant valve that controls the flow of engine coolant to the coolant heat recovery tank; a clog in the engine cooling system, or the engine ECU.

jetsfan_00 · 07-08-2008, 08:38 PM

To all,

Another site states this DTC Error Code P1121 for an 05 Prius is Accelerator Pedal Position Sensor Range/Performance Problem. In the past it cleared when I removed and replaced the gas cap. Now it is constant. Do you have other info to support DTC P1121 is "Coolant Flow Control Valve Position Sensor Circuit Stuck". Vehicle has had its coolant and CVT coolant replaced around 60K.

Is the code Coolant or Accelerator?

07-06-2008, 02:09 PM	#1
jetsfan_00 Junior Member Join Date: Jul 2008 Location: Virginia Posts: 9 My Car: 2005 Prius Package: #2 Nominated 0 Times in 0 Posts TOTM Awards: 0 Friends: 0	Check Engine Light My 05 Prius with 75000 miles started to get check engone light in Jan. I continue to receive the light to date. I can clear the light by removing and replacing my gas cap. I have replaced the gas cap as well. Right now when I ckear the light, it will come back after a day or 2 and will not clear. It clears after I fill it up and only for a day or 2. No change in gas mileage, but having this light will cause the vehicle to fail emissions as my state goes by computer codes and not exhaust gases. I have talked with my shop and they can determine the error codes, but feel they could not repair. Need to go back to Toyota for a smoke test to fix any problems. This is becoming very common on most newer cars due to the E10 fuel being offered. Has anyone found a low cost solution? Or do I have to go to the dealer for a smoke test and cost for the repairs.

07-08-2008, 05:23 PM	#3
jetsfan_00 Junior Member Join Date: Jul 2008 Location: Virginia Posts: 9 My Car: 2005 Prius Package: #2 Nominated 0 Times in 0 Posts TOTM Awards: 0 Friends: 0	Re: Check Engine Light Bob, Can you help and tell me where this port is located? I have an analyer but do not know where this port is to plug it in. Cheers, Tim

07-08-2008, 05:24 PM	#4
doubleg2005 Senior Member Join Date: Jun 2007 Location: Kilgore, TX Posts: 241 My Car: 2007 Prius Package: #3 Touring Nominated 0 Times in 0 Posts TOTM Awards: 0 Friends: 3	Re: Check Engine Light is this the same as the maint light? (probably not, eh?) the maint light can be cleared manually quite easily... if that were the case, i would say just clear it manually before the emissions test

07-08-2008, 05:55 PM	#6
jetsfan_00 Junior Member Join Date: Jul 2008 Location: Virginia Posts: 9 My Car: 2005 Prius Package: #2 Nominated 0 Times in 0 Posts TOTM Awards: 0 Friends: 0	Re: Check Engine Light No, i know how to reset the maintenance light. I have acontinuous check engine light and I cannot find the port to plug the analyer. Toyota claims it is directly under the steering colunm. I have not been able to locate any such port. If hidden, please give me a clue where it is.

07-08-2008, 08:13 PM	#8
jetsfan_00 Junior Member Join Date: Jul 2008 Location: Virginia Posts: 9 My Car: 2005 Prius Package: #2 Nominated 0 Times in 0 Posts TOTM Awards: 0 Friends: 0	Re: Check Engine Light I found the port. It was near my Right knee about an inch from the center console. The error code is P1121. What does this tell me?

07-08-2008, 08:21 PM	#9
Patrick Wong DIY Enthusiast Join Date: Mar 2008 Location: Orange County, CA Posts: 1,998 My Car: 2004 Prius Package: #9 Nominated 0 Times in 0 Posts TOTM Awards: 0 Friends: 28	Re: Check Engine Light DTC P1121 "Coolant Flow Control Valve Position Sensor Circuit Stuck". The possible trouble areas include the coolant valve that controls the flow of engine coolant to the coolant heat recovery tank; a clog in the engine cooling system, or the engine ECU.

07-08-2008, 08:38 PM	#10
jetsfan_00 Junior Member Join Date: Jul 2008 Location: Virginia Posts: 9 My Car: 2005 Prius Package: #2 Nominated 0 Times in 0 Posts TOTM Awards: 0 Friends: 0	Re: Check Engine Light To all, Another site states this DTC Error Code P1121 for an 05 Prius is Accelerator Pedal Position Sensor Range/Performance Problem. In the past it cleared when I removed and replaced the gas cap. Now it is constant. Do you have other info to support DTC P1121 is "Coolant Flow Control Valve Position Sensor Circuit Stuck". Vehicle has had its coolant and CVT coolant replaced around 60K. Is the code Coolant or Accelerator?

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