My keep grand Cherokee year2012 the temperature gage goes...

My keep grand Cherokee year2012 the temperature gage goes up when we turn on the A/C Mechanic's Assistant: How many miles are on the Jeep? Have you checked the coolant level? Yes it has 220 Mechanic's Assistant: A...

My keep grand Cherokee year2012 the temperature gage goes up when we turn on the A/C Mechanic's Assistant: How many miles are on the Jeep? Have you checked the coolant level? Yes it has 220 Mechanic's Assistant: Are you fixing your Grand Cherokee yourself? What have you tried so far? Just checked the levels and used the code reader p1128 Mechanic's Assistant: Anything else you want the Mechanic to know before I connect you? Also 02 sensor bank 1

Automotive Expert
Welcome to JustAnswer. Thank you for contacting us for assistance with your vehicle. I'm Pete. I will be happy to assist you with your question. May I ask to whom I have the pleasure of speaking with today?

Lawrence Dennis
Automotive Expert
Hello Lawrence. Nice to hear from you today! I'm sorry to hear you are having this problem. I know this can be frustrating. Can you tell me what liter your engine is in your vehicle? Was anything done to your vehicle that may have caused this issue to occur?

I think 4.6 and no but the hose to radiator came off so I put it back on and I have no leaked or anything
Automotive Expert
Thank you for that information! Did you top off the radiator fluid at all once the hose was reinstalled?

with radiator fluid
Automotive Expert
Did this issue occur immediately after the hose issue?

No my wife says before and I had check the fluid levels when she told me it happen
Automotive Expert
Thank you for your reply and that information as this does help me better understand the situation. Please give me one moment to type out some info for you. I’ll be right back!

Automotive Expert
Thank you for holding Lawrence! If the vehicle is only heating up or overheating when the AC is being used this indicates that the AC condenser or the radiator fins are bent over or damaged. The AC condenser sits in front of the radiator. If there are any bent fins they would need to be straightened out using a tool like the one in the link below. If there is any debris in front of the AC condenser or between the radiator and condenser then the debris has to be removed. If the fins are o.k. and there is no debris, then this indicates that the engine cooling fan(s) is not operating properly. The cooling fan system will need to be tested to identify the issue causing the fan fault and from there it can then be repaired to resolve this issue. This will involve electrical testing as well as having the fault codes checked with a fully compatible high-end scan tool to identify which fan component has to be replaced.

Automotive Expert
Your welcome! Glad I could be of some help! I hope everything works out well for you! If there are any additional questions on this issue that should arise, please feel free to reply and ask! Thank you for choosing Just Answer for your questions. Have a great day!

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