No info on alldata for code

Jason Technician Hawthorne, New Jersey Posted   Latest  
Question
Driveability
P00B7 - Engine Coolant Flow Low/Performance

Hey what's going on guys. If someone can point me in the right direction with this code P00B7. Engine coolant low flow/performance. Checked in alldata but it skips this code. It only has the p00b6. No real description or operation on code setting criteria. This has on the water outlet jacket coolant sensor 1 and by the radiator it has a sensor and that is coolant sensor 2. It has the electronic thermostat with the heating element controlled by the computer. Customer doesn't have any complaints of overheating but when I looked at freeze frame on this code the coolant temperature Pid was at 253 degrees Fahrenheit. Thats strange to me. On my snap on i only have one coolant temperature sensor pid and no other sensors to compare temperature difference. I unplug the sensor at the water outlet jacket and Pid drops to -40 degrees. Now i have an idea on some direction. Car running and the max it would go is 179 to 181 and drop down to like 161 to 159 and then slowly climb. Hose coming out the thermostat is HOTTTT so im not thinking is stuck open all the time and not properly building up heat. Just looking for a direction. Can it be that this sensor on the water outlet jacket be skewed. Customer was in a rush and really couldnt get into more depth with it or take pics. Just looking for some direction for when the customer does come back and ill hook up the Autel to see if more pids are available. Has someone seen this code? Thank u 

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Bob Owner/Technician
East Longmeadow, Massachusetts
Bob
 

Can you post up the vehicle info or vin number?

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Randy Diagnostician
Glendora, California
Randy
 

Are you reading scan data in obd mooed or enhanced

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Geoff Diagnostician
Lahaina, Hawaii
Geoff
 

I realize that P0--- DTC have generic SAE definitions, but often times knowing the kind of car may help.

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Jason Technician
Hawthorne, New Jersey
Jason
 

I'm sorry guys its my first time posting and i thought i put the year make and model. Such a rookie lol. Its a 2012 chevy cruze 1.4 liter turbo. Looking at pids on enhanced side. Sorry. I really hate bothering people but i have no info to go by with Alldata.

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Bob Owner/Technician
East Longmeadow, Massachusetts
Bob
 

DTC P00B7 00 Engine Coolant Flow Insufficient Circuit/System Description The engine control module (ECM) monitors the temperature of the radiator coolant temperature (RCT) sensor. The engine coolant thermostat heater is controlled by the ECM. The ECM controls the engine coolant thermostat heater with a pulse width modulated (PWM) signal. The ECM compares the radiator coolant temperature (RCT)…

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Jason Technician
Hawthorne, New Jersey
Jason
 

Thank u Bob.

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Randy Diagnostician
Glendora, California
Randy
 

Go to obd side and rear freeze frame data and post what temp was

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Jason Technician
Hawthorne, New Jersey
Jason
 

In my post I put that when I went to freeze frame on generic the coolant temperature pid was at 253 degree Fahrenheit. It seemed strange to me because customer doesn't have a complaint of overheating. I should have asked if at any time did he notice the fans kicking on and stayed running. Guy was in a rush so he said he would be back. Thank u guys

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Randy Diagnostician
Glendora, California
Randy
 

What was the engine rpm and miles per hour on freeze frame

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Jason Technician
Hawthorne, New Jersey
Jason
 

Honestly Randy I blew pass that because customer was in a rush and I was looking for some direction. Curiosity? What's is ur thought process on knowing the speed? Are u thinking if it was at idle and the pid read that temperature u would go after a skewed sensor? Customer should be back and I'll have more time to play with it and not be rushed. U got me thinking Randy about ur question

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Randy Diagnostician
Glendora, California
Randy
 

Need to check inlet and outlet temp with therm o gun at radiator and read freeze frame pids to see when this happened . Did you check radiator for being full is over flow bottle over filed

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Mark Manager
Boston, Massachusetts
Mark
   

Good morning Jason , I recently had a 2014 Cruze 1.8 no turbo this car would set all sorts of coolant system codes this is what I found with the coolant sensors​.​When checking data on my scanner generic and enhanced I would only get 1 coolant temp pid even though there are 2 sensors. I replaced the coolant thermostat housing wich had the coolant sensor and the thermostat heater . And replaced…

+2 Ð Bounty Awarded
Jason Technician
Hawthorne, New Jersey
Jason
 

Thank u Amigo 😀. So ur fix was to change the whole thermostat housing with sensor and lower hose sensor? I guess u played it safe and replaced them as a pair. Do u check if the thermostat was opening up to determine to replace the whole housing with sensor? No disrespect I just dont see how u really pinpointed the root cause of the codes. If I'm not mistaken that model doesnt have a sensor on…

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Mark Manager
Boston, Massachusetts
Mark
 

this one beat me up for a few days , bought just the thermostat first time around , car seemed fine for a few days warmed up good heat , no issues. Car come back reached out for some help finding my way out of the forest I was wandering in​.​This time back dash warning message was saying car was running hot wich it was not. New approach was to repair was to replace the whole housing…

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Jason Technician
Hawthorne, New Jersey
Jason
 

Nice write up my friend. Thank u for sharing.

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Robert Engineer
Durham, North Carolina
Robert
 

Hello Jason, Many years ago we had a similar issue with Mercedes 112/113 engines. I believe it was mostly in the ML320s and 500s. We never understood the reason or could really figure out why but it had to do with the type of coolant. Mercedes made a change in the coolant type but if you went back and filled with the traditional glycol coolant you got a code for something to do with the warm…

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