I have a 93 Land Cruiser, and I noticed that the engine light comes on the first start-up of day when I start to accelerate, but if I shut the engine off and turn it back on immediately then the engine light goes away even when while accelerating. Has anyone else experienced this?
Engine light goes away on the second start up? (2 Viewers)
- Thread starter LandCruiserGEO
- Start date
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You're going to need to pull codes.
My guess is some sensor is getting tired and not providing the correct feedback voltage when cold, but when warmed up its happy.
The only way to know which one is to pull the code.
My front CAT heater circuit pulls this stunt. Likes to be packed in mud, when clean it throws a code....tried half a dozen times to fix it, and gave up.
My guess is some sensor is getting tired and not providing the correct feedback voltage when cold, but when warmed up its happy.
The only way to know which one is to pull the code.
My front CAT heater circuit pulls this stunt. Likes to be packed in mud, when clean it throws a code....tried half a dozen times to fix it, and gave up.
- Thread starter
- #3
Come to find out - It was a bad knock sensor I bought at the auto store. I put the old oem knock sensor back and engine started running good again. No engine light.
My '93 does the exact same thing!
Initial startup then once you hit ~2k rpm light comes on, but after ~10 minutes of warming up and then a restart the light doesn't come back. I know it gives code 52 and I know my front knock sensor is one of the cheap eBay "OEM" models so I finally broke down and bought a real OEM one.
Your story has convince me to brave the Texas heat and get it swapped over to the legit one to see if it goes away.
Malleus
Far west of Siegen
The prices for the OEM parts are criminal
alia176
SILVER Star
Agreed. I bought two knock sensors for my daughter's 5VZ-FE from Amayama for a significant cost savings. I also ordered bunch of stuff or a head gasket job at the same time.
alia176
SILVER Star
I'm curious if you fixed the problem by replacing the knock sensor or my moving the wire around, which might've temporarily improved the connection! Let's hope it's the former, not the latter! In my case, both knock sensor wires were brittle so I ran two new parallel wires from the sensors to the ECU pins. That finally cured my issues.
Two years ago, I replaced the whole harness and now everything is MOBETTA!!!
I ordered mine from Partsouq and I'm hopeful now it'll fix the issue.
Ali, where is that ECU? IN case my legit knock sensor doesn't resolve the issue I may go the same route and run new lines.
