I have a 98 S70 non-turbo. 9 days ago I went out to the parking lot to go home and the car wouldn't start. An hour later I came back and the car started without hesitation but the check engine light was on. The diagnostics test came back with reading P0340 - Camshaft Position Sensor Circuit Malfunction . The check engine light was cleared the same day and i haven't had any issues with the car since. How likely is it that it was a one time issue, some fluke that tripped the check engine light? If not, what do I do to correct this issue?

 

Moved to S70 section.

 

The cam sensor is possibly going bad.

 

I replaced my sensor when I got this code and it never came back. It's not a very expensive sensor if I remember correctly.

 

cheapest i've found is 143 for the cam position sensor. is the sensor the same as the relay? just trying to save myself some money for now, times are tough

 

Hi Everyone, yip its sounds like my volvo, after replacing the camshaft sensor, air flow regulator, spark plugs and fuel filter... lots more , the code p 0340 is still active and have idlling problems on occasion, the car is very heavy on fuel and not that responsive as it use to be, my local garage is also confused, can anyone please give some adcvice as i love my car and its loving my wallet more!

bokkie

 

My car was never sluggish, just at one point wouldn't start. It did finally die on me in Denver over the Holidays but as soon as i replaced it (and it took 10 minutes) it worked fine. No problems since then

 

Daughter left here this morning, went back to college, made a few stops, then at the dorm the car would not start. I took the 150 trip and no spark. Pulled a P0340 code. Tried to unplug and plug back in the camshaft position sensor and the darn thing fell apart in my hand. I just had the thing out a year ago when I did the cam seals. Now the top bolt is stripped.

 

Replaced the cps and we're up and running again. Got one from a local junk yard.

 

Hello All,
Long story long.....the wife drove the 98 S70 to work no problem, in the evening...crank but no start. I made the mistake of disconnecting battery cables and cleaning etc and cleared the CEL code (the light had come on previous). After some internet research , I replaced to the Camshaft sensor, and the car started and initially ran fine. I drove to the part store five minutes away, when I tried to restart, it was misfiring/backfiring, stalling, running terrible. This problem persists. Did I shut the car off too soon and mess the ECM reconfigure up? The Crankshaft Sensor looks far more difficult to replace. It seemed like the whole timing system went haywire. It starts every time now, just is undrivable. I thought I had it when the car started when it previously wouldn't. Any help for a hack, cash strapped non-mechanic?

 

What codes do you have now?

 

I didn't recheck with scanner, will a code be present w/o a CEL on? When I get home from work I'll try to plug the scanner in and check for codes, thanks for responding!!

 

Yes, a code could be present.

 

No code present.....and now the car is doing what it did originally. Crank, no start. I should probably bring the cam sensor back. I didn't get it at Volvo..it could be junk. I'm not adept at a volt meter, I guess there could be resistence or corrosion some where (ECM?) that could cause sensor failure. Thoughts?

 

I recently brought an 05 xc70 but it was running rough. These two codes came up but upon further inspection i saw this cord was detached. Can anyone tell me what this is and if will cause the car to run rough or not turn over.

 

Hi I have a Volvo S60 T5 single vvt hard start with code p0340 checked t timming replaced cam and crank sensors can any one help

 

It is probably not the sensor itself. The sensor is nothing more than a magnet that senses the gap in the steel sleeve ring on the cam. Not much to go bad.

The wiring harness would be my first thing to inspect on a car of that vintage. All of the black loom has likely disintegrated by now so you may need to pull the harness, remove the rest of that loom, then inspect for broken or shorted wires.

The other part of this system is the VVT which can cause a hard start if stuck. Check the simple things first.

 

Did you ever find a solution to your problem? I am getting P0340 code error as well

 

Please were able to fix your problem? I have a similar one

 

Is it the Mass air flow sensor you had replaced? That is what my problem was, and it fixed it immediately. Same symptoms
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