Code p72o & p1618 &p1633 on my s80

2000 Volvo s80 won't start - YouTube

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www.youtube.com/watch?v=SNvrQYmBIVw
Jul 29, 2013 - Uploaded by Christopher Johnson
Change the wires and I am sure the car will start up fine. ... VolvoS60 S80 V70 Corroded Starter Wire Engine Will Not Crank or Turn Over ...

bad ABS module

CODE P1618 - CABLE FAULT BETWEEN AW 50 Q2 TRANSMISSION CONTROL MODULE AND MOTRONIC 4.4 ENGINE CONTROL MODULE. YOU CAN CHECK FOR RECALLS BUT I DONT THINK THERE IS RECALL FOR YOUR PROBLEM. YOUR PROBLEM IN TRANSMISSION CABLE COULD BE LOOSE OUT OF PLACE DAMAGED OR YOU HAVE TCM ECM FAULT.

PO705 is Transmission Range Sensor Circuit Malfunction. PO733 is Incorrect 3rd Gear Ration Information. P1618 means that the ECU and the TCM are not communicating properly. PO705 & PO733 can be related to P1618. Check the wiring going to the transmission. Look for a pinched wire from the car being put on a rack or possibly an accident you may have had recently. If you can find no problems with the wiring or connections then it is time to see a professional transmission expert. It may just be that the transmission has an internal problem.

Check for vacuum leaks. Also make sure any air intake boots are on tightly. If not, this could give faulty readings to the MAF.

Is an engine light on? If so, get the codes pulled free at an auto parts store.

I have a similar problem, I am going to assume that most of the lights have gone out and you are left with the check engine and a transmission service message. Check the OBD for the error codes and see what they say. If they are P0722, P1618, P1633 it is likely your ABS module. This module appears to have a life span of 5 years to 80,000 miles average before it needs to be replaced. Other symptoms of a bad module would be that the ABS light comes on while driving down the road. Than goes out on the next engine restart or two. Victor Rocha is reconditioning ABS modules for $125.00 and upgrading them to better than factory. There are instructions on the web of where and how to remove the ABS module. This is better than the dealer's new module for $995.00 plus installation.

Since I do not understand your "won't drive", I will suggest this. If before this problem your ABS light would come on and than it would go out after you restart your engine. The problem might be the ABS module. If you can read the OBD error codes you likely will have P0722, P1618 and P1633. A message that says the transmission needs service. From what I have found on the web is replacing the ABS module will correct the problem. It appears that the ABS module has a life of 5 years to 80,000 miles on average. Volvo networks a lot of its computer information thru the ABS, thus a bad ABS can indicate a bad transmission. I am told that Auto Zone auto parts can read the error codes for you. But they may require you to being your car to their stop. You can also purchase your own ODB II reader from and auto parts store or Sears. Hope that helps.

i got an volvo s80 and today i got the message on dashbord like this TRANSMISION REQUAIRED SERVICE what its that ?any one can help ?

the p0720 code is a common code in every car...it has to do with an issue in the transmission. what exactly i dont know how to answer that.

the other two codes are vehicle specific codes which means the manufactur made these codes specifically for this vehicle and it has something to do with the PCM-auziliary devices..

Hope that gets you started