Hi everyone,
1999 Toyota Landcruiser 4.7L V8
I'm posting this in the hopes that it will help someone out there. I am currently having codes P1125 and P1128 and I think it's my Throttle Control Motor. I referenced this page.
https://forum.ih8mud.com/threads/p1128-throttle-control-motor-malfunction.166808/#post-5382539
Please, provide any other ideas. I have not changed TCM yet, but is next on my list.
It all started 3 weeks ago when I broke down about a mile away from my house. I had been having problems with my starter contacts and the starter teeth grinding. Somehow, I broke my alarm off my key and stuck it in my pocket. Guess what? Car wouldn't start. Had it towed home. Later found out about the magnetic transponder that needs to be up to the ignition. It's in the first 5 or so pages in the manual that I never read. I got a new key and had the master. No problems. $185 for key at Tacoma, WA dealer 105 to program. This was with the alarm.
I changed my starter. That back bolt was a bitch like everyone said. I broke the knock sensor = $100 bucks. Starter was Bosch and costs $200.
While I had the manifold off, I cleaned it, but did not bother with the throttle body as this looked clean. I just wiped it down = mistake that I found out later.
I put it all back together and I ended up breaking the water temperature sensor near the passenger side/front part of manifold = $20 or $30 bucks. Broke the sensor right next to that. It's a little smaller = $22 bucks. Okay! Everything worked.
Next day, was too tired to do oil change. Therefore brought it to the dealer = $55 bucks. Drove out of there and went about 3-4 miles and car went into limp mode = frick! Pulled over to the side of the road and had code reader. Reader read = P0120. Turned off car and then code came back on. This is very scary on the freeway. Decided to floor it and Landcruiser went one speed = Fast. Made it home which was about 15 miles. My headlight also went out when I left the dealer. I think this was coincidence.
I started reading the forum. Decided to change the Aps sensor ($225). That code went away. Now I was getting some other codes. Something about dirty throttle body and TPS. I changed the TPS sensor ($90 because I wanted it right away) and then those codes went away. Then I took the throttle body off and cleaned the heck out of it. I should have cleaned it when I took the manifold off. I also should have changed the Apps Sensor and TPS sensor while the throttle body was off. I suggest you do this step and clean and test it. I put back together unhooked the efi fuse and battery...Everything started right up and sounds good. But, I still have to floor it to get any fuel to the engine. Also, the idle went from like 1000 rpm to 1400 rpm. I'm still messing with the TPS sensor positioning.
So....now I am getting P1125 and P1128.
Am I on the right track in changing the Throttle Control Motor next?
Also if you don't know where the TPS is....it is on the driver's side front part of the manifold underneath some hoses. Thanks!
1999 Toyota Landcruiser 4.7L V8
I'm posting this in the hopes that it will help someone out there. I am currently having codes P1125 and P1128 and I think it's my Throttle Control Motor. I referenced this page.
https://forum.ih8mud.com/threads/p1128-throttle-control-motor-malfunction.166808/#post-5382539
Please, provide any other ideas. I have not changed TCM yet, but is next on my list.
It all started 3 weeks ago when I broke down about a mile away from my house. I had been having problems with my starter contacts and the starter teeth grinding. Somehow, I broke my alarm off my key and stuck it in my pocket. Guess what? Car wouldn't start. Had it towed home. Later found out about the magnetic transponder that needs to be up to the ignition. It's in the first 5 or so pages in the manual that I never read. I got a new key and had the master. No problems. $185 for key at Tacoma, WA dealer 105 to program. This was with the alarm.
I changed my starter. That back bolt was a bitch like everyone said. I broke the knock sensor = $100 bucks. Starter was Bosch and costs $200.
While I had the manifold off, I cleaned it, but did not bother with the throttle body as this looked clean. I just wiped it down = mistake that I found out later.
I put it all back together and I ended up breaking the water temperature sensor near the passenger side/front part of manifold = $20 or $30 bucks. Broke the sensor right next to that. It's a little smaller = $22 bucks. Okay! Everything worked.
Next day, was too tired to do oil change. Therefore brought it to the dealer = $55 bucks. Drove out of there and went about 3-4 miles and car went into limp mode = frick! Pulled over to the side of the road and had code reader. Reader read = P0120. Turned off car and then code came back on. This is very scary on the freeway. Decided to floor it and Landcruiser went one speed = Fast. Made it home which was about 15 miles. My headlight also went out when I left the dealer. I think this was coincidence.
I started reading the forum. Decided to change the Aps sensor ($225). That code went away. Now I was getting some other codes. Something about dirty throttle body and TPS. I changed the TPS sensor ($90 because I wanted it right away) and then those codes went away. Then I took the throttle body off and cleaned the heck out of it. I should have cleaned it when I took the manifold off. I also should have changed the Apps Sensor and TPS sensor while the throttle body was off. I suggest you do this step and clean and test it. I put back together unhooked the efi fuse and battery...Everything started right up and sounds good. But, I still have to floor it to get any fuel to the engine. Also, the idle went from like 1000 rpm to 1400 rpm. I'm still messing with the TPS sensor positioning.
So....now I am getting P1125 and P1128.
Am I on the right track in changing the Throttle Control Motor next?
Also if you don't know where the TPS is....it is on the driver's side front part of the manifold underneath some hoses. Thanks!
