How to Replace CPS on Saab 9-5 - Hot Start Issue FIX, Crankshaft Position Sensor Replacement
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- čas přidán 26. 12. 2020
- Resolving the Hot Start Issue - Replacing the Crankshaft Position Sensor (CPS) 9177221.
Symptoms of a Hot Start Issue are when the car continuously cranks and refuses after a journey when the car gets to operating temperature, however, once cooled it is fine to crank and fire up.
When the ignition is switched on, the Trionic 7 EMS lights the CHECK ENGINE lamp and performs the function check. The fuel pump is activated for 1 second to build the fuel pressure, after which the EMS will await pulses from the Crankshaft Position Sensor, if this fails the EMS will disable the ignition and fuel injection. When the CPS Ohms resistance falls outside the operating perimeters, it activates the failsafe, according to WIS, the Sensor resistance should be 860±90 ohms.
My Saab 9-5 Aero 2.3 Turbo B235R had a hot start issue during the summer of 2020, where, if I switch off the engine when at optimum temperature and attempt to restart within a short timeframe, the car will crank and refuse to fire, however, if I let it rest for 45-60mins it was quite all right.
This was an intermittent issue and I experienced it no more than on three occasions, however, before it got worse I decided to replace the CPS in July with an aftermarket item as I was unable to source a Bosch part.
After replacing the sensor I never had any issues, I am very sure that the heat from the Turbo and CAT destroyed the CPS due to the close proximity to heat. The metal heatshield surrounding the CPS most probably has minimal impact on dispersing or deflecting the heat.
All you will need to replace the CPS is a T30 Torx for the CPS bolt a flat-head screwdriver to remove the wiring loom and a lot of patience.
Tightening torque, nut, and heat shield:
20 Nm (15 lbf ft) (up to and including engine no. 7011078)
21 Nm (16 lbf ft) (from and including engine no. 7011079) - Auta a dopravní prostředky
My brother’s good with the Saabs, too! Thanks for the vid.
I've done quite a few of these. As a matter of fact, I had to go get my son whose car died in the middle of the road. We swapped out the ignition cassette with a spare I had that didn't fix it so I immediately knew it was the crank position sensor.
I found it's a lot easier to go under the car to do this. You can barely see it from the top but you have full access underneath the car.
2nd time round I replaced it over the slam panel, it was really easy as I knew where and how to access the CPS.
After removal, slice the bottom of the heat shield where the screw goes through approx 4 o'clock. Place new sensor in cavity, screw in bolt but do not tighten to allow heat shield to slide from top angle onto the screw. Tighten. This will make installation much easier.
this is awesome. really shows where and how.
gonna go change mine now. thanks.
Thanx for the video man! Changed my CPS yesterday with success 👌
Awesomeness, we need to keep these great cars alive!
jizz...!
Thanks for your video, at least one know the exact position ( to abuse the hands on)
Thank you again!
well done lads, helped me finding and changing mine
Cheers Dave, great to hear my videos helped.
Car finally threw a code p0337 it was having hard starts and would die occasionally while idling when hot. Classic crank sensor symptoms so happy its a cheap and easy fix because I am about to sell this car.
It's a T30 Torx bolt.
Took me 3 hours, wife helped me as my fingers were too big.👍
Glad you got it sorted it out dude.
Sounds like you got a good women by your side, my missy would run a mile, if I asked her for support
😉 Yes she is. We have been married for over 20 years. Someone at SAAB should have been shot though.😓😓 what a nightmare to get this little torx out.
Thanks for the video.
I had a hell of a time replacing this part. I had to bend the heat shield back and forth until it snapped off, otherwise you are blind to where the screw (T-30) is on the CPS. Even then, I had to use a very small air ratchet to remove the screw and a finger ratchet to screw it back on. Thanks for the video. It helped.
Much obliged,
I am so sorry to learn about the heat shield, the first time I looked for the trox screw I too was unable to identify it, and truth be told that is very reason why I ran to my younger brother.
Well I am happy my video provided some assistance, thank you for your comment.
Thank you and warm regards.
@@the80sdude51 I'm wondering how your Saab is doing after replacing the CPS? Once I replaced mine, I test drove it right away--ran great--but then immediately stalled at a stop sign. I'm guessing I didn't allow it enough time for the computer to adjust to the new parts (I replaced the mass air flow, too). So, I pulled the negative post off the battery, placed it back on, then allowed it to run for 20 minutes or so; now it's running fine and maintaining RPM's when stopped. Eureka!!!!
@@scoop23jk My vehicle was fine straight away and run perfectly for a few months and then suddenly the cheap ebay CPS starting to show symptoms regardless of engine temperature. I did not waste any time and took it out at the earliest convenience, I instantly noticed the tip of the magnet was misaligned and had some impact markings, I thought it must have made contact with the trigger wheel.
I was rather confused as to how this was possible, I genuinely thought the crank end float has excessive play. Having both the CPS out side-by-side I scrutinised the build quality and measured both with a digital vernier caliper and noticed the eBay item was ever so slightly taller (1mm) than the Bosch item, and that explained why it made contact.
I purchased a Valeo item and benchmarked it with the Bosch unit and it was identical, once I replaced the CPS for a Valeo item the car has been great.
@@the80sdude51 thanks for the video I’m about to do this job tomorrow.I paid £35 for an unheard of make sensor for TMS hopefully it’s okay
@@Robbo2g You got this Luke, the force is strong
Thanks for the video.
I hope the video provided some support.
Good work! thanks
Thank you for watching and I happy it provided you with some support
Nice video my friend
Thank you 👍
Would have been nice to see how you got the wiring unhooked as I cannot get mine to release either... Other than that, quite appreciated!
Great video man , can you tell me where is the komputer located in that car ?
ECU is behind the bulkhead, underneath the wiper scuttle on the passenger side.
Thanks for the video. What exact CPS did You buy? has to be Bosch, or Valeo is ok too? Anyone tried other brands?
6 months after shooting the video the 3rd party CPS failed. The shock and horror of being stranded in a retail park pushed me to purchase both Bosch and Valeo brands.
After examining the brand's I went ahead with the Valeo, as it just felt better and seemed superior.
Well, couple years on it is still functioning without faults.
Well recommended!
@@the80sdude51 thanks.
to check for faulty CPS you can ohm it
Good idea, what are the resistance values for good one? THX
😅引擎在什麼情況之下 要更換這個零件？
當引擎很熱並且無法重新啟動但繼續旋轉而沒有點火時，這是曲柄位置感知器故障的常見跡象。
Are you two twins?? Damn!!! 🤣🤣
Never been called twins before, however, many have said we look very similar.
Is this the position/circuit a or b?
Hi Carson,
I do not understand the question, can you expand in a simple way please?
LoL i wish i had slim hands and not these sausage fingers would had made it a lot easier for me, btw i have done 100d's of these
The cup.of coffee
My good sir, I'm a tea man
My apologies lol thanks for the video. Hope your eyes are OK lol
It costs nothing to tell people what size the bolt is
Hi Allie, the bolt type and size is on the description right at the bottom, and also mentioned in the video.