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Search Auto Parts Search Temp gauge problem Sign up here!   Email This Post Auto Repair Home>> Automotive Repair>> Engine Troubleshooting Steve_qs New User Mar 7, 2015, 1:46 PM Post #1 of 3 (1499 views) Temp gauge problem Sign In Hello, I'm Steve and I have a 02 Montero LTD., 3.5L, 189,000 mi. During this past winter I've had a coolant and...I believe an electrical power problem. -The check engine light has been on since I got it inspected which I'm sure is a catalytic converter prob. but it went off recently fo about a week...then came back on. Now the engine light is off again. -During this time, the dome light that comes on inside the truck when you open the door stopped coming on for about two to three weeks. Now I get in my truck a few days ago to warm it up in the morning and click the unlock button to make sure it's unlocked and the dome light just turns on. -The biggest worry I have though is that yesterday when I'm leaving work...I turned on the ignition and the temp gauge just SPIKED immediately, right when I turned on the ignition. This has never happened before. I drove the truck a bit on the way home and at first, the needle went down to normal for a sec but went up then down about a quarter and then up and it's been up to the top ever since. I stopped a few times in some parking lots to see if it was over heating and it isn't. No antifreeze smell or steam or anything. It does have a coolant leak but it's not bad and I keep it full and check it. The gauge just stays at the top. I'm thinking electrical or computer. I just replaced the alternator about two years ago. Can anyone help with info on this problem? Thanks in advance :) Discretesignals Ultimate Carjunky / Moderator Mar 7, 2015, 3:11 PM Post #2 of 3 (1481 views) Re: Temp gauge problem Sign In Moved your thread to an appropriate section. You really need to make separate threads when you have more than one problem. For the check engine light have the engine computer scanned to see what trouble codes are stored. Write them down. For the temp gauge. Make sure your coolant level in your radiator is good. You really need to have the coolant leak fixed. Have the system pressure tested. Normally your engine doesn't overheat that quickly, so it is probably a gauge issue. If it is stuck on H, unplug the temperature gauge sender with the ignition on and see if the gauge goes to C. The gauge sensor is located next to the engine coolant temperature sensor on top of the engine near the thermostat housing. It has one black/red wire. As for the dome light issue...create another thread. Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved. (This post was edited by Discretesignals on Mar 7, 2015, 3:14 PM) Steve_qs New User Mar 7, 2015, 3:39 PM Post #3 of 3 (1472 views) Re: Temp gauge problem Sign In This helps. Sorry Thanks for your response and advice.   Email This Post   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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