I have a 2005 Volvo S40 T5. Bosch diagnostic error codes 290C, 280B, 2900, 290B & 280C, fuel pressure sensor related. No loss of power or misfire, car goes nicely. Should a part be repalced? Thanks!

Possible water pump failure. Was temp guage showing "hot" ? , if not maybe coolant sensor issue. Had the car just been driven hard ? Any pressure in coolant expansion tank ?

Hello
The Engine and Automatic Transmission (not applicable to manual transmissions) in this vehicles drive train are fully electronically controlled by a computer called the PCM and TCM (Power Train Control Module, Transmission Control Module). When a problem like this or other drive-ability related problems occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump, engine coolant temperature sensor and MAF sensor for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPENDING YOUR HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM. Also always check fuel pressure for correct spec for your make and engine type.

Car not starting or turning over indicates towards multiple possibilities. It can be issue with battery or weak battery. But if battery checks out ok, then it can be starter issue or faulty alternator or problem with low fuel pressure or no spark at spark plugs due to dirty spark plugs or faulty ignition coil or injectors getting cracked or dirty and needs to be cleaned.

To confirm the problem, the basic troubleshooting is required.

Click this link below and follow the troubleshooting:------

http://technoanswers.blogspot.in/2012/02/car-starting-issues.html

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This will help.

Thanks.

code efi-232 is long term fuel trim, idling. intake/exhaust leak, fuel pressure, excessive fuel in engine oil, engine oil level to high. injectors. EVAP canister purge valve, wiring MAF sensor, ECT sensor HO2S. hope this helps and let me know if you need any more info

P0170 code is a malfuntion with basicly an oxgen sensor bank one this i know for sure . But P2187 is vary spiscifc to volvo . Its not a transmission code . So it must be a catyalic restertion code the two go to gether and would make sence . But eigher call the dealer or have the code read at a shop before you make the final dianostic and start spending money on it. It may but a bad 02 sensor bank 1 sensor 1 that will clog the oxgen sensor in time . So head it off now you may get out cheaply

This is not always the problem. Have you changed the fuel filter, checked the relay, and checked the gas cap(This keeps the fuel tank under pressure). try these first, and hopefully this is it. hope this helps

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.

had this problem as well.. check the oxygen sensor on it (sometimes critters like that wire) or like shel said dirty injectors or filters could be it.. bad gas is also another one... dont go to places with old tanks or that is really cheap, run at least 91

Get somebody who has a diagnostic scanner... OBD .. to connect it to your car and see if there are any error codes.

It's possible that a sensor has failed

ok, lets try to throw few suggestions

number 1 probably problem with air mass meter
number 2 fuel pressure regulator or electrical solenoid on the high pressure fuel for activating-deactivating third piston

can you please send more info when it looses power etc...