Question about 2002 Volvo S40

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Check engine light went on on my s40 Volvo

While driving engine light turned on and forward arrow light also went on

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6 Suggested Answers

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Posted on Jan 02, 2017

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  • 31 Answers

SOURCE: Volvo S40 OBD II P0171 & P0237

for p0171 it could be a few things like intake/exhaust leak,air system,map/vaf sensor,fuel presure/pump,injector(s),ho2s(heated oxygen sensor.

Posted on Sep 19, 2008

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  • 1 Answer

SOURCE: Check Engine light P1670

I have a 2000 Volvo S70 as well with the same code. Do you ever have trouble starting your car? I did and that's why I took it to the dealer. Appartently it's the code for the ignition immobilizer system in your car (part of the security system). Specifically, a part call the antenna ring. The antenna ring is the outer portion of your ignition switch on the steering column - the part that lights up and has the following printed on it: 0 - I - II - III. This part is actually a sensor that transmits the code stored in the microchip inside of your key. When this part goes bad it fails to transmit the correct key code to the computer, and cuts the fuel to the engine.

The dealer wanted to charge me $550 for a new antenna ring, two new keys, and software to program the car's computer with the new key codes. I purchased the antenna ring online for $50 and did it myself in 15 minutes - so easy. They claim that you can't replace the antenna ring without new software - lie! You only need the software if you are replacing the keys.

Car is running great.

Posted on Mar 30, 2009

  • 580 Answers

SOURCE: 2001 volvo s440 1.9t

Volvo Radiator, Thermostat and Sensors Your cooling system's temperature controls include all coolant temperature sensors, Volvo thermostat, Volvo radiator or expansion tank cap, cooling fan(s) and fan clutch (if equipped). These cooling system parts function primarily independent of the engine but control the engine either through cooling or by sending control signals to your Volvo's electronic systems.
The Volvo thermostat is a spring-loaded valve that opens and closes based on the temperature of the coolant flowing through it. A high temperature reading followed by a drop to normal temperature (or a continuously low temperature) is a common first sign of a sticking Volvo thermostat. However, many other conditions may cause these symptoms, so you need to know how to eliminate each possibility.
The Volvo radiator or expansion tank cap is also a spring-loaded valve reacting to system pressure. It serves to maintain proper system coolant level at predetermined pressures. It must always be replaced with an exact replacement cap with the same pressure setting. Never use other caps except for short-term emergencies!
A belt-driven fan blade for pulling air through the Volvo radiator is usually on the Volvo water pump pulley and should have a fan clutch to control it. The fan clutch allows the fan to turn with the belt at low engine speed and "free-wheel" at higher speeds. A bad fan clutch either doesn't allow the fan to spin at low speed (overheating in traffic) or doesn't allow it to free-wheel at high speed (potential overheating on highway or reduced gas mileage).
An electric fan can be either by itself (usually front-wheel drive) or auxiliary (used with a mechanical fan). Both types are controlled via a temperature sensor - in the Volvo radiator or upper Volvo radiator hose or on the Volvo thermostat or Volvo water pump housing. This sensor is usually an on/off type switch with a fixed temperature setting. (Some vehicles may have 2-3 settings for multi-speed fans.) This sensor is commonly called an "auxilliary fan switch".
Other common temperature sensors are: 1) gauge sender (variable output); 2) warning light sender (on/off type); 3) lambda and/or fuel injection sensor(s) (variable to control fuel injection settings); 4) thermo-time switch (cold start valve control). Your Volvo may have other sensors as well.
Temperature control is critical to both performance and emission control. Unfortunately, this system is the most difficult to troubleshoot without proper equipment and diagrams. It's even more difficult with computers that adjust timing, idle speed, vacuum and fuel delivery automatically to make up for potentially faulty temperature sensor signals.
Maintenance of your cooling system sensors is virtually impossible since there's nothing really to "maintain". Keeping them clean both internally (coolant replacement) and externally (engine cleaning) is the best way to ensure trouble-free driving. Checking and replacing all parts at the factory-recommended time or mileage limits helps as well

Posted on Jul 23, 2009

  • 1 Answer

SOURCE: Flashing upside down arrow/ slow acceleration

This is a common problem of Volvo S40. You can try this trick to turn off the flashing arrow light.

1) Turn off Engine
2) Turn key to "On" position (Not start the engine), you will see the panel light will on
3) Step on the break paddle
4) Shift the gear from "P" to "L" 10 times
5) Turn key to " Off" position
6) Now you can start the engine.
7) If doesn't work, you can repeat the procedure.

Hope this tick help
Good luck

Posted on Aug 14, 2009

  • 1 Answer

SOURCE: pcv valve location

volvo s80 y reg 2.4 runs ok little bit lumpy tickoover when warm but very loud whistling noise take dipstick it stops but very big suction from tube not pressure it is not breather box under manifold

Posted on Mar 12, 2010

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it sounds like your tranny went out and will need to be replaced

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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.

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The large arrow warning light is blinking ( in drive position) Came on while I was driving


Lots of people experience this problem and google provides several links to answers to it, but here is my take on it. The contacts in the gear selector mechanism can trigger this fault code. Put the key in the ignition, foot on the brake pedal, without starting the car, move the gear selector from P to L 10 or so times. This will clean the contacts. Turn key off. Start the car. On my S40, I have to drive it about 10 miles before the arrow light goes out. If it doesn't, do the procedure again to clean the contacts. It sounds crazy, but the process actually works.

Dec 02, 2010 | 2000 Volvo S40

2 Answers

The shift up button is flashing. Unsure how to make it stop


This has happened twice in our 2000 V40. There is a transmission sensor that goes wonky, or possibly gets a bad connection. You'll probably get engine codes P1618 (Transmission code waiting) and P0705 the actual transmission code saying there's trouble.

Both times I was able to reset the sensor by shifting repeatedly with the engine off and the key in various positions. Sorry I can't be more specific. There were directions on the net and I followed them the first time. The second time I wasn't able to find them and just shifted and keyed for 5 minutes and it was fixed.

Ours goes bad when it rains, so I'm thinking it's a bad connection.

Feb 07, 2010 | 2001 Volvo S40

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2007 Volvo S40 - starting problem


My volvo s40 2007 mode display check engine.I have send to the mechanic .but it diplay again.Please tell me what to do.

Jan 28, 2010 | Volvo S40 Cars & Trucks

1 Answer

Flashing upside down arrow/ slow acceleration


This is a common problem of Volvo S40. You can try this trick to turn off the flashing arrow light.

1) Turn off Engine
2) Turn key to "On" position (Not start the engine), you will see the panel light will on
3) Step on the break paddle
4) Shift the gear from "P" to "L" 10 times
5) Turn key to " Off" position
6) Now you can start the engine.
7) If doesn't work, you can repeat the procedure.

Hope this tick help
Good luck

Jun 02, 2009 | 2000 Volvo S40

1 Answer

2003 Volvo S40 starting problems


Volvo 2000 S40. Fantom starting problem. Went to the starter and has no power to soliniod. Will start for weeks then nothing.
Is this a module

Mar 13, 2009 | 2003 Volvo S40

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