20 Most Recent 2009 Jeep Wrangler - Page 2 Questions & Answers

its a speed sensor for the abs system

The core is behind the pass side dash,whole dashboard has to be removed then the heater module in order to replace the core.

Computer Control Module needs to be reflashed it sounds like. The dealer has the required components to fix it

if they have replaced it 3 times and still can't get the leak stopped A. It not the heater core something else is leaking B. there using a used heater core (which is my opinion is plain . . stupid)C. the mechanic has no idea what he doingFirst thing they should have done when car was brought in the 1st time was check for other leaks if it is the heater core still leaking the mechanic is installing it wrong or not geting hoses tight. the actual changing of the heater core takes only about 10 minutes and actually a easy process that anyone could do. What takes the most time is getting to the heater core because the majorly of the time the whole dash has to come out which takes hoursI would take your car somewhere else and have it fixed right and have them bill the dealership for the repairs

that is your Security, eng immobilizer, keyless entry control module, you may have a blown fuse or the control module is bad

i would expect this sort of thing on one of these american motors where the front steering will feel the front drive ,it happens on most 4x4 i have test driven except the honda thingy i look after think its a called a crv ,this is like driving a rolls its so smooth its untrue

the security light warns you that there is a safety problem and check your guages. Just check the tire pressure and add where it needs it. this should fix your problem. If it continues often then you probably have a slow leak and need tire repair

Your cooling system works by getting air flow over the radiator and good circulation of coolant in the radiator as well as other areas of the motor.
The fan for your radiaror is electric, but it is designed to run at different speeds depending on conditions. First, I would verify that the fan DOES run. Sitting in the driveway with the engine at operating temperature, turn the A/C on and see if the fan speed increases right away or increases after running for 10 minutes. It should have a higher pitched sound. Look at the temperature gauge again and see if it is still at operating temperature. If the temperature continues to climb, turn the heater on full blast and watch the temperature gauge, it should drop.
No increase in fan speed means you could have a module problem or other problem related to the fan speed. In your relay box, relay "K11" is the fan relay. The relay box is in the engine compartment. The underside of the cover will identify what relays go for what. Some Jeeps used 2 relays, 1 for low speeds and the other for high fan speeds.The fan and module are replaced as a unit. The PCM (power control module is the brain for the engine management system including the controling of the fan relays. Sometimes the relays are the same and you can swap them with each other to see if there is a change. Note: If the temperature is normal when you are driving down the road, than the cooling system is normal and it is the fan.
Good luck.