Check engine light on volvo s40 2004

This is a gearbox issue. Both codes relate to the transmission. Specifically P0717 is to do with an engine speed sensor that lets the gearbox know when it is supposed to change gear. Have you had any work done recently. They might have disturbed some wiring causing this problem. Replacing this sensor is not a simple task as i believe it is inside the box so requires the gearbox to be removed. There are some good Volvo forums on the internet that will be able to help you and point you to a local independent Volvo garage rather than a main dealer to keep costs down.

https://www.matthewsvolvosite.com/volvo-1999-and-newer-codes

When was the last time that you had the transmission serviced? Sounds like something is plugging the valve body.

I DOUBT THAT ANY CAR CAN BE TURNED 'ON' WHEN A GEAR IS ENGAGED.

i also have a 99v70.
As i was driving the car home 2 days ago in cruise control. Suddenly the speedo dropped to '0'. The cruise control quit and the abs, upshift arrow, and check engine light came on. The solutions is the 'abs control unit' From Volvo; 870.00
from Advance; 256.00 w/ core exchange. Its fixed all those dash issues.good luck

go to Advance auto parts to test the OBD II sensor codes first to see what codes are coming up. Advance auto parts has one there they can check your codes for free.

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.

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

Yes, it's the 'pnp' switch (also known as the inhibitor switch) which is on the side of the transmission.

I own 2 Volvo 960s (3 litre automatics) which are similar in many respects ... and have that flashing arrow. It's a well known fault and you don't have much to worry about.

Rather than write it all here, you can read what I wrote as an ebay guide about it at http://reviews.ebay.co.uk/Volvo-960-Automatic_W0QQugidZ10000000003233806

I did put similar info on my website at http://www.glennsmart.btinternet.co.uk/volvo960.html with photos

Though the ebay guide is better ...

If you haven't got time to read it ... forget the flashing arrow and put a bit of black tape over it ... My wife's car has (192,000 miles) had that arrow flashing for 3 years. My car (100,000 miles) has had that flashing arrow since I bought it 1 year ago.

I did change the pnp on both cars ... but you also need to have the computer error reset by Volvo to have the light extinguished. Don't worry ... keep driving.

You have a fault recorded in the transmission control module. Retrieve the code for more info.

Bret
RepairPal.com