Howdy. Has anyone experienced this? I've provided codes also. And some test results when warmed up. Thanks!

1,000 miles ago my 2003 3.8L Montero Limited, auto trans, 220,000 miles, had been driven for 10 minutes in town and it started slowing down, eventually to 20mph. Playing with throttle did nothing, except keep it limping. No jerking or RPM slippage or revving. All gauges, RPM/transmission normal. Check engine light came on (but is always on for oxygen sensors). It was turned off and sat for 30 minutes. Started up fine and drove home 10 miles fine as if never happened. I was busy and forgot to check codes. Next day it was fine too. We forgot about it. 😆

I drove it for 1,000 miles, once through 4 mountain passes for 500 miles, no issues over that 2 day hard road trip. Then today, same thing occurs except on the Interstate. I could keep it to 40mph on level ground. It started slowing down from 80mph to 40 mph over a 3 mile distance. Manually moving gear selection did nothing. I limped it home 20 miles. I let it rest 45 minutes and started it up. Seems good again. As if nothing happened.

I pulled these codes and took these screen captures when it was fully warmed up again, but I hadn't touched the throttle at all. I just started it and let it idle to warm.

***The oxygen sensor codes have been there for 40,000 miles. Cleaning and replacing them did not solve issue, so I just chunked it to "old truck with dumb gadgets", as I don’t care about CEL (no emission testing) and everything else was good with it.

So there's 3 new codes which seem to be related to this random limp issue.
P0335
P2135
P0340

Anyone else have this happen and figure it out? Thanks!

 

I think No1 suspect is the throttle position correlation error code. Can't really help you with solutions, since it is newer vehicle than I have experience on.

 

Thanks Hunter. I am going to pursue checking out the TPS with a multimeter, the wiring, tapping on it, and using a hair dryer to heat it up to see if it fluctuates at all.

 

However, even without the specific codes, I can offer some general suggestions based on the symptoms you've described:
Transmission Issues: Given that you're experiencing a loss of power and control over your vehicle's speed, the issue might be related to the transmission. It could be a sensor problem, a solenoid issue, or even a failing transmission control module.
Intermittent Sensor Problem: Sometimes, sensors can fail intermittently, causing the vehicle to go into a limp mode. If one of the sensors that feeds critical data to the engine control unit (ECU) is failing temporarily, it could trigger this kind of behavior. It's also really cool to play online casions sometimes, especially if you have the information https://casinosanalyzer.com/online-c...egascasino.com not to be afraid of anything. Electrical Gremlins: Wiring issues or loose connections can cause all sorts of strange problems in modern vehicles. An intermittent electrical problem could potentially lead to the symptoms you've described.
Temperature-Related Issue: The fact that the problem seems to go away after the vehicle has cooled down might indicate a temperature-related issue. This could be related to a sensor that behaves differently when hot.
Engine Control Module (ECM) or ECU Issues: The ECM/ECU is responsible for controlling various aspects of your vehicle's performance. If it's malfunctioning, it could lead to the symptoms you've described.