20 Most Recent 2005 Volvo S40 - Page 7 Questions & Answers

Follow the cable from the battery to where it bolts onto the engine and body, I think it's a two sectioned cable, See if you can see any other wires attached to it and check for shabby loose little bits of broken wires that fit into the actual connector at the cable ends.Electrical connections are normally joined to the positive cable on most cars.If nothing ,Then go to an independent parts retailer and get a cheaper version matched up as they're all made from the same materials. Phew $400 is a bit crazy. greed is spreading rampagely on our planet, Especially within the motor industry.Good luck.

you need a scanner having your car's program and to do the alarm reset to reset the alarm.

P0172 - System Too Rich (Bank 1)
Basically this means that an oxygen sensor in bank 1 detected a rich condition (too little oxygen in the exhaust). On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1.

Note: This DTC is very similar to P0175, and in fact your vehicle may show both codes at the same time.

Symptoms: You will more than likely not notice any drivability problems, although there may be symptoms such as a misfire.


Causes: A code P0172 may mean that one or more of the following has happened:
* The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters can cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
* There could be a vacuum leak.
* There could be a fuel pressure or delivery problem


Possible solutions include:
* Inspect all vacuum and PCV hoses, replace if necessary
* Cleanthe MAF sensor. Consult your service manual for it's location if you need help. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling
* Inspect fuel lines for cracks, leaks, or pinches
* Check the fuel pressure at the fuel rail
* Check the fuel injectors, they may be dirty. Use fuel injector cleaner or get them professionally cleaned/replaced.
* Check for an exhaust leak before the first oxygen sensor (this is unlikely to cause the problem, but it is possible)


Hope helps (remember to rate this answer).

switch is worn out

I had a similar experience. Finally the car started overheating. Turned out the thermostat went bad and the radiator blew a leak. Had those replaced. Runs great.

if computers arent picking anything up its not an electrical fault, sounds like your surging because of bad fuel or blocked injectors, run some fuel cleaner through the car and see if that makes a difference. fuel filters may need to be changed but try the cleaner first.

there will be no easy fix here other than to replace the compressor. have this done by an air con expert. expect to pay for gas, compressor , air receiver/ drier and possible tx valve

check ur fuses

Check vaccuum leaks and fuel injection system.

If it is not the bulbs (which is possible) you will have to trace the wiring to see where you are loosing power. We have replaced 3 Central Electric Modules (CEM) in the last 6 months. If you need a wiring diagram, let me know.