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A fault code of P1618 indicating fault in lead between AW 50-52 and motronic 4.3 The car is not raving appropriately. Please what will I do?

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Posted on Jan 02, 2017

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SOURCE: DTC code-P1618 = fault in lead between aw 50-52

aw50-52 is the transmission. motronic is the fuel system. it means the two modules are not communicating with each other.you will need a pinout diagram for these modules and go from there.its difficult to remove computers on late volvos without the speciall tool.furthermore getting an acurate diagram other than a volvo service manuel [paper service manuels were discontinued in 2000].will be near impossible. in this case it makes sense to bring to the dealer.

Posted on Apr 25, 2010

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1 Answer

Thier shoud be a recall volvo with p1618


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.

Aug 15, 2011 | 2001 Volvo S80

3 Answers

I have a 2001 vovlo s80 with the codes p1618 p0705 po733 how can i fix


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.

Aug 13, 2011 | 2001 Volvo S80

1 Answer

PO 722 1238 137 1618 1132


1132-This Relates to Heated oxygen sensor (H02S) 1, bank 1/heated oxygen sensor (H02S) 2, bank 1 - signal incompatibility
1618-This Relates to Cable fault between AW 50-Q2 TCM and Motronic 4.4 ECM (lamp lights)
1238-This Relates to Turbocharger (TC) boost pressure sensor - boost control malfunction
0137-This Relates to Bank 1, Sensor 2 - Circuit Low Voltage for O2
0722-This Relates to No Signal in Output Shaft Speed Sensor Circuit

Mar 30, 2011 | 2000 Volvo V70

1 Answer

Codes 1238 1618 1132


I would assume that these are 'P' codes.Please advise if they have a different letter prefix or nothing at all.
P1238-This Relates to Turbocharger (TC) boost pressure sensor - boost control malfunction
P1618-This Relates to Cable fault between AW 50-Q2 TCM and Motronic 4.4 ECM (lamp lights)
P1132-This Relates to Heated oxygen sensor (H02S) 1, bank 1/heated oxygen sensor (H02S) 2, bank 1 - signal incompatibility
Try deleting them all first then just focus on the ones that wont reset,followed by those that come back on after driving or using that area.
Hope this helps you.

Mar 30, 2011 | 2000 Volvo V70

1 Answer

Codes 1132, 1238, and 1618


All are P codes
1132-This Relates to Heated oxygen sensor (H02S) 1, bank 1/heated oxygen sensor (H02S) 2, bank 1 - signal incompatibility
1238-This Relates to Turbocharger (TC) boost pressure sensor - boost control malfunction
1618-This Relates to Cable fault between AW 50-Q2 TCM and Motronic 4.4 ECM (lamp lights)

Mar 30, 2011 | 2000 Volvo V70

2 Answers

I put the computer on my volvo v70 n i have this code ..p0460,p1618,p0722,p1550 and i like to know what r they and how can i fick them cuz i need to pass the inspection to get it register . in the dasboard...


Per other sites I've seen these 2 codes p1618,p0722, are your ABS module. It can be taken out and re soldered and will work fine. Many Volvo mechanics know how to do this or you can find a repair service on Ebaymotors possibly. My guy charges me $150. Supposedly you can even drive the car without the module installed but you won't have abs so don't expect to stop as you usually would with a correctly working ABS. Your tires will now skid old school instead of the abs module taking over and pullsing your brake pedal, etc.

Oct 28, 2010 | 1999 Volvo V70

1 Answer

99 Volvo S70 code 1618. What needs to be done to


CODE P1618 CABLE FAULT BETWEEN AW 50 Q2 TRANSMISSION CONTROL MODULE.AND MOTRONIC 4.4 ENGINE CONTROL MODULE LAMP LIGHTS.

Jun 11, 2010 | 1999 Volvo C70

2 Answers

DTC code-P1618 = fault in lead between aw 50-52 and motronic 4.3. what does this mean and were is it on the car . its a vovlo s 40 year 2000, made 09/99 motor is 1.9 gas auto trans


aw50-52 is the transmission. motronic is the fuel system. it means the two modules are not communicating with each other.you will need a pinout diagram for these modules and go from there.its difficult to remove computers on late volvos without the speciall tool.furthermore getting an acurate diagram other than a volvo service manuel [paper service manuels were discontinued in 2000].will be near impossible. in this case it makes sense to bring to the dealer.

Apr 18, 2010 | 2000 Volvo S40

1 Answer

There are 4 codes I need to know about P0810, P1132, P1618, and P1633, 2001 Volvo V-70 24T


810 neutral check, incorrect connection
  • Check the transmission and control module connectors. Check for contact resistance and oxidation according to Checking wiring and terminals. Permanent faults
  • 1132 front o2 sensor signal too high
    1618 dtc is in another module
    Volvo does not provide information regarding DTC P1633 for many of their models.
    However, it has been reported that various Volvo engine control modules will produce this code. The code is associated with a missing or inaccurate vehicle speed signal from the ABS control module and may be accompanied by DTC P0722 or P1618.

    Possible causes:
    - Defective vehicle speed signal to the ABS control module
    - CAN connection problem
    - Defective ABS control module
    - Defective engine control module

    Manufacture codes associated with this P code may include ECM-510f, 530d.

    Mar 28, 2010 | 1998 Volvo V70

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