2002 s60. Won't start

[Jimmyd48]

Hello. Having trouble starting my daughters S60. It turns over but does not fire. Only have OBDII reader and it has a P2121 and P2120 codes. I saw a list of Volvo codes cross referenced and the P2121 is faulty accelerator pedal.

If this true would that keep it from starting or just trouble with acceleration?

The list Did not have P2120 on it.

The car just stopped running at a light one night and here is where we are. Car ran great until then, in fact she had just driven 900 miles from North Carolina to Wisconsin that day without trouble.

thanks

[harryhendo]

When you turn the key to start the car, do you hear the fuel pump running? It is under the rear seat. You can pull up the rear seat cushion and see an access panel. Listen carefully to hear the pump run. If you don't hear it running, it may be a bad pump or blown fuse.

Another common failure is the crankshaft position sensor. This is a very common failure on these cars, and is evidenced by cranking with no start.

[Jimmyd48]

Thank you for the response.

Yes, I can hear the fuel pump. I have had someone turn the key to on and stuck my ear in the filler pipe. I have inspected all fuses on the entire fuse block and all are good.

IS there a way to test that sensor or just replace and hope?

Thanks

[harryhendo]

The crankshaft position sensor is a very common failure point. I don't know any way to test it. It is a fairly common and inexpensive part (around $70), and easy to replace (one bolt, pull it out). That's what I would do next.

[Jimmyd48]

What do you make of the P2121 code of Accelerator pedal failure? Is the system of ignition tied to that pedal as well, due to it being fly by wire?

I am willing to get the CPS as Rock Auto has them for less than $40, but I am still confused by the OBDII reference.

Thanks

[harryhendo]

I don't know anything about the P code issue you mention. I've never heard of that error in relation to a no start condition. Sorry I can't shed any light on that issue.

[abscate]

P2120 and P2121 codes are throttle position sensor circuit D codes - there could be trouble with either the accelerator pedal or the Electronic throttle body (ETB). Usually, this would go into limp mode and get you home. Im not sure if your 2002 S60 uses the Magnetti Marelli ETB or the later Bosch unit, which lasts longer. How many miles are on the S60?

[draser]

The pedal sensor, actually a single or double potentiometer, tells the throttle where to be at. Check first sensor condition and connector contacts. If you remove the sensor you could try to test its resistance with ohm meter. Not sure what the pin out is, a wiring diag. will tell, but placing one lead of tester on cursor and other on either end you should see a liniar variation as you rotate cursor of sensor. Or you could test in car, set meter to volts, one lead on cursor and other on chassis. Pushing pedal should show a liniar volt change. Tap connector wires from back with needle prongs since sensor needs to be plugged in and ign sw on 2.

[Jimmyd48]

P2120 and P2121 codes are throttle position sensor circuit D codes - there could be trouble with either the accelerator pedal or the Electronic throttle body (ETB). Usually, this would go into limp mode and get you home. Im not sure if your 2002 S60 uses the Magnetti Marelli ETB or the later Bosch unit, which lasts longer. How many miles are on the S60?

180,000, there was a valve job about 5,000 ago.

[Jimmyd48]

Would either the pedal or body keep it from starting? I would think it would run like garbage, but shouldn't it at least show some signs of life?

I am going to remove connectors on both to inspect wires and ends.

THanks