Nov 182019


My vehicle is a Volvo V50 2.4L petrol, 2004-2010 model. I have read the diagnostic and report shows fault:
400A, Canister purge valve, circuit fault, permanent
I am having a hard time locating the canister purge valve in the bonnet/ under the hood. Should I replace with new part or could it be a hose which is bent or damaged. First issue is locating, i have looked online and cant seem to find a video or layout. Thank you for the service, best regards. James

Volvo Code 400A

Canister Purge Valve. Faulty Signal

Code 400A Description

The engine control module(ECM) detects a fault in the function of the EVAP valve by analyzing the signal from the manifold absolute pressure (MAP) sensor.

The diagnostic trouble code 400A is stored if the ECM registers that the EVAP valve is stuck.

Code 400A Possible Causes

  • The hose between the intake manifold and evaporative emission system (EVAP) valve is defective, blocked or trapped
  • The hose between the evaporative emission system (EVAP) valve and canister is defective, blocked or trapped
  • The EVAP valve has stuck in the open position
  • The EVAP valve has stuck in the closed position
EVAP Canister Purge Valve Location

Component #6


Brakes will not release 2007 Volvo s60

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Nov 122019


My front brakes will not release immediately after I go from park to drive. It sometimes takes up to 30 seconds to release. What could be the cause of this?

One possible cause may be a restriction in the caliper hoses. Pressing the brake pedal is required to move the shifter from park to drive. So the brake fluid may be having a hard time moving back. However I would think you would notice this each time you stop and not just when you move the shifter from park to drive.

Most often the car has been setting in the same spot for a while before you need to move the shifter from park to drive. This has me thining the brake calipers or pads are sticking and not being allowed to slide freely. A caliper slide or brake pad slide may be the issue.

No matter the case, removal of the front wheels and an inspection of the front brakes are in order.

Front Brake Caliper Service

  1. Raise and support front of vehicle, then remove front tires.
  2. Disconnect brake lines, then remove two caliper attaching bolts and caliper.
  3. Remove piston dust cover, then place a piece of wood or suitable material between both pistons. Force pistons out of bore using low pressure compressed air.
  4. Remove sealing rings, then bleeder screw.
  5. Clean caliper assembly thoroughly using brake fluid or denatured alcohol.
  6. Remove any surface rust on cylinder using fine sandpaper.
  7. Before assembly, coat all components with clean brake fluid, then install new seal rings and pistons.
  8. Install new dust cover and bleeder screw.

PCV Valve hose coming apart 2004 Volvo S40 T5 2.5

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Sep 092019


See attached picture. This hose keeps coming detached and causes the car to shake and the brakes to be very hard to press. What is this hose for and how is it supposed to stay connected?

Looks like a PCV hose, Positive Crankcase Ventilation Valve hose.

It looks to me like the plastic molded piece has separated. You can purchase a new one and replace it or try to repair it. I would go for trying to repair it first myself. A thin bead of Super Glue around the edge should do the trick.

But if you have time you may want to call the dealership and have your VIN# handy. There is a TSB – Technical Service Bulletin out for this part.

Positive Crankcase Ventilation (PCV) Oil Trap and Ventilation Hose Extended Warranty 205

Reference number: SMB 22-205, Date of Issue: January 16, 2009

Effected Vehicles

Volvo: 2004 – 2008 S40; 2005 – 2008 V50; 2006 – 2008 C70; 2007 – 2008 C30

Extended Warranty 205 – PCV OIL TRAP AND VENTILATION

Volvo Cars of North America, LLC and Volvo Cars of Canada Corp. have voluntarily decided to extend warranty coverage for the PCV Oil Trap and Ventilation Hose on model year 2004 – 2008 S40, V50, C70 and C30 vehicles. For eligible vehicles that are beyond the manufacturer warranty period, Volvo will extend the warranty coverage on the PCV Oil Trap and Ventilation Hose for 10 years or 120,000 miles, whichever occurs first, from the date the vehicle was originally placed into service.

Reimbursement for customers who previously paid for repair

Send repair order with a copy of the customer letter to:

Volvo PCV Oil Trap and Ventilation Hose Extended Warranty c/o The Advertising Checking Bureau, Inc

P.O. Box 1919

Memphis, TN 38101

Failed Part # 30788494

Labor Time: 1.6 Hours


It has been identified that in certain LEV2 (Low Emissions Vehicle) vehicles listed above, the material in the PCV (Positive Crankcase Ventilation)oil trap pressure control diaphragm and the crankcase ventilation hose may become cracked due to long term exposure to the crankcase environment. If this occurs it is possible that the MIL (malfunction indicator light) will illuminate and post an ECM (Engine Control Module) 250A code. In addition, there may be a whistle type noise emitted from the crankcase.

Replace Drive Belt 1995 Volvo 960 L2.9

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Dec 212018

Is the replacement of the drive belt idler pulley on 1994 Volvo 960 L2.9 a do-or-yourself job? I have a belt detentioner and basic mechanical skills. The pulley seems accessible on front of block. Single bolt. Any pitfalls?

Serpentine Drive Belt, Replace

1. Rotate or lift the belt tensioner arm, using a suitable tool to relieve tension from drive belt.
2. Remove the drive belt.
3. Clean pulleys and inspect for any bent or damaged pulleys.
4. Reverse procedure to install.

REM Module 2004 Volvo XC90

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Apr 082018

2004 Volvo XC90

How do you access the brake light relay (REM module) in the rear (left) driver side compartment? Seems you must remove the entire panel for unrestricted access. How is that done?

Rear Electronic Module (REM) Replacement Procedure


The REM Module is a separate unit in the relay box located in the cargo compartment.

  • Switch ignition off.
  • Remove the left side panel in the cargo compartment. HINT: The rear panel in the side panel of the cargo compartment can be removed to change fuses.
  • Release the relay and fuse box.
  • Remove the screw holding the connector so that it is free of its threads. Check that the screw is free with your fingers.
  • Disconnect the connector. Use an open spanner and a support.
  • Remove all relays and shunts bridged to the control module. Note the locations.
  • Release the catch on the rear. Use a screwdriver.
  • Lift and pull out the control module.

REM Module – 2004 Volvo XC90


Hydrocarbon refrigerant 86 Volvo 740

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Jun 162017

Volvo 740

Hydrocarbon refrigerant

I have a long standing discharged R12 ac system. I want to charge it with hydrocarbon refrigerant to check it. If I decide to have it recovered after recharging it is the shop liable in reporting it to the EPA?

More importantly, hydrocarbon refrigerant can be used in place of R134a without components or oils having to be changed. Since your system is using the old R12 permanent damage will occur. The entire air conditioning system needs to be flushed. The accumulator and orifice tube replaced before changing over from R12 to Hydrocarbon or R134a Refrigerant.

With your system being as old as it is you are most likely looking at needing to replace the compressor, accumulator and orifice along with flushing the system and replacing the o-rings. This is at a minimum.



’96 Volvo 960 Sedan ignition module

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May 242017

Volvo 960Where do the wires that lead to the spark plug lead back to, i know they go from the plug back to the coil then where do they lead to after that?

Volvo Ignition Module

The power stage on the REX-1 and EZ129K systems is combined with the ignition coil into a single unit (Power Stage/Ignition Coil). The ignition coil and power stage are an assembly.

Volvo refers to the ignition control module as the power stage.

On the EZ 115 K and EZ 116 K Systems the the ignition module and coil are separate.

Volvo ignitin module

  1. Disconnect the negative battery cable.
  2. Unplug the power stage connector.
  3. Unfasten the mounting bolt(s) from the retaining bracket, then remove the ignition coil and power stage.
    To install:
  4. Install the coil and power stage and tighten the retaining bolts.
  5. Plug in the power stage connector.
  6. Connect the negative battery cable.

1985 volvo 244 dl

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Mar 102017

1985 Volvo 244how much should it cost to replace the distributor on car, i have the parts, labor and timing should be all needed


Distributor Cap And/or Rotor, Replace

Distributor Cap And/or Rotor, Replace (b)

Labor Times
Comments Factory Regular Severe
0.0 0.3 0.3


NOTE: This procedure pertains to gasoline engines only.

The distributor performs two functions within the ignition system. Its breaker points or impulse sender (electronic ignition) time the collapse of the magnetic field of the ignition coil in relation to engine speed and convert primary voltage (12 volt) to secondary (high) voltage. The rotor and cap then distribute the high voltage spark to the correct spark plug.

The distributor incorporates both centrifugal and vacuum ignition timing mechanisms. Centrifugal advance is controlled by two weights located beneath the breaker plate. As engine speed increases, centrifugal force moves the weights out from the distributor shaft and advances the ignition by changing the position of the cam in relation to the shaft. This advanced positioning of the cam will then open the breaker points sooner and ignite the air/fuel mixture quickly enough in relation to piston speed. Centrifugal advance is necessary because as engine speed increases, the time period available to ignite the mixture decreases. (For example, at idle speed the ignition setting is, perhaps 10°BTDC. This is adequate for the spark plug to ignite the mixture at idle, but not at 2,500 rpm. The weights, governed by springs, move out at a predetermined rate to advance the timing to match engine speed.)

Centrifugal advance is not sufficient to provide the proper advance under all conditions, and so we also have vacuum advance. Under light load conditions, such as very gradual acceleration and low speed cruising, the throttle opening is not sufficient to draw enough air/fuel mixture into the cylinder. Vacuum advance is used to provide the extra spark advance needed to ignite the smaller mixture. The round can on the side of the distributor is the vacuum advance unit. The rubber hose supplies vacuum from the intake manifold to draw on the diaphragm in the unit which is connected by a link to the breaker plate in the distributor. Under part-throttle operation, the vacuum advance moves the breaker plate or impulse sender as necessary to provide the correct advance for efficient operation.

1994 Volvo 940 na

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Nov 212016

1994 Volvo 940no spark at coil have replaced ckp coil ecu and power state out of ideas


According to the wiring diagram the coil receives its power through the Radio Interference Suppression relay. I recommend checking this relay if you are not receiving voltage at the coil. Use the wiring diagram below as reference to help understand the circuit.

Engine wiring diagram 1994 Volvo 940


Timing Marks 1972 Volvo 145

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Jul 212016

timing marks diagram 1972 Volvo 145While turning over the engine by hand, if my rotor is pointing at the #1 spark plug wire position will the engine always be at or near TDC? The rotor will point at a different plug wire (4 in this case) when cylinder 1 is at exhaust stroke, correct? Does it have timing marks?


You are at top dead center(TDC) when the #1 Piston is all the way up and both exhaust and intake valves are closed. When continuing to rotate the engine past TDC, the next valve that will open should be the exhaust valve.


  • Remove the timing belt cover as outlined previously.
  • To remove the tension from the belt, loosen the nut for the tensioner and press the idler roller back. The tension spring can be locked in this position by inserting the shank end of a  3 32 (3mm) drill bit through the pusher rod.
  • Remove the six retaining bolts and the crankshaft pulley.
  • Remove the belt, taking care not to bend it at any sharp angles. The belt should be replaced routinely at 45,000 mile intervals, or anytime it becomes oil soaked or frayed.
  • Align the crankshaft and camshaft marks prior to removing the timing belt — B230F engines
  • If the crankshaft, idler shaft, or camshaft were disturbed while the belt was off, align each shaft with its corresponding index mark (to assure proper valve timing and ignition timing) as follows:
    1. Rotate the crankshaft so that the notch in the crankshaft gear belt guide aligns with the embossed mark on the front cover (12 o’clock position).
    2. Rotate the idler shaft so that the dot on the idler shaft drive sprocket aligns with the notch on the timing belt rear cover (four o’clock position).
    3. Rotate the camshaft so that the notch in the camshaft sprocket inner belt guide aligns with the notch in the forward edge of the valve cover (12 o’clock position).
  • Install the timing belt (don’t use any sharp tools) over the sprockets, and then over the tensioner roller. Loosen the tensioner nut and let the spring tension automatically take up the slack. Tighten the tensioner nut to 37 ft. lbs. (50 Nm).
  • Rotate the crankshaft one full revolution clockwise, and make sure the timing marks still align.
  • Reverse Steps 1–3 to install.