Hi guys My volvo s60 2002 once a day the engine shut off during runing when i used the car for 40 minutesm and sounds like if the car has a fail, the muffler sounds like bru bru bru bru, and the car shake it, i scan the car and says code P1238, what do i have to do it to fix it .some guys tell me that i just have to clean the throttlr with carburator cleanner where is the location for the throttle

Hi. Here are directions to reset your immobilizer. The ignition switch has for positions. You will be using two (Accessory and Run). NOTE: Do not start the engine during the reset procedure.

NOTE: Look at your gauge cluster and identify the trip display and reset button.

(1) Turn the ignition switch to the accessory position.
(2) Set the trip reading to TRIP 1 (T1) and push and hold the trip reset button.
(3) While holding the reset button, rotate the key to the RUN position.
(4)Hold the reset button until you see the triangle in the dash flash yellow. Once this starts flashing remove your finger from the reset button. Shut the car off, verify light is out. repeat once if necessary.

Get it towed to a shop. Sounds like an idler or tensioner going bad. If it failed you will bend valves and damage the engine badly.

The fuel pump relay is a good bet. Many old Volvo owners carry a spare fuel pump relay in the glove box because it is not uncommon for them to fail.
I and another guy disagreed the other day on the easiest way to access the relay. He says it is easier to remove the glove box. I thought it was easier to drop the felt liner below the dash and lay on my back on the floor and reach up. Either way works.

This sounds like a crossed sparkplug wire, start by making sure the firing order is correct, if theres a sparkplug wire in the wrong spot this would cause hard starting and the backfiring, so check the firing order first, i would of given you a firing order diagram but you forgot to list the year, make , model and the engine size. good luck and have a good day.

YOU REPLACED BATTERY.BUT CHECK TO MAKE SURE YOU HAVE RIGHT COLD CRANKING AMPS.AND CHECK BATTERY CABLES.MAKE SURE THEY ARE CLEAN AND TIGHT.IF BATTERY CABLES OVER 10 YEARS OLD REPLACE THEM.MAKE SURE YOU ARE USING RIGHT VISCOSITY MOTOR OIL.YOU SHOULD BE USING 5W - 30 ENGINE OIL IN COLDER CLIMATES.IF YOUR OIL TOO THICK IT WILL CAUSE ENGINE DRAG WHEN CRANKING IN COLD WEATHER.

Have the throttle positioning sensor checked for that sounds like the problem you are having with yours

try replacing the fan relay switch

sounds like your lifters or valves are rattling!

put parking brake on if you want them off while driving the brake doesent need to be fully pressed just a little not even aplied at the wheels and lights will shut off

Hi there I have the same problem I start the car and the moment I move my hand away after turning the ignition the engine shuts off lights still go on in and out of the car though, then I pull the key out then start again and it goes sometimes while travelling the engine will just shut down. Called AA (Break down help service) and a guy came and he said to me that its the ignition switch he showed me where and told me to try and put something next to the ignition so it wouldnt shut down and also said to me that its common with HONDA CRV'S. He also said that if while driving home and it does the same thing to turn the engine on and rev the engine and leave your hand where you have put the key in the ignition. I know weird right well I was tested tonight and remembered what he said and drove like that home with my right hand on the key in the ignition and the other on the steering wheel to control I know stupid me but i wasnt going to leave my car parked on the side of some road and come back the next day and its gone. Anyway a solution for this problem would be to go to your nearest mechanics garage and just ask to get your ignition switch checked and fixed if need be the guy from AA said to that the other cause would be my alarm in my car. Im going to get this sorted tomorrow.
I hope this helps or not....