charliefunkuk
Member
- Joined
- 19 Feb 2017
- Messages
- 6
Hello, any advice on below would be greatly appreciated. Here is the story of what happened to my car a 997 C4S cab manual. 2007
Car went in to local garage (non-OPC) due to an engine management light, and running lumpy at low revs. After investigating and putting it on a diagnostic, it was decided that the O2 sensors were the issue.
Due to them all being massively corroded and while the car was in and up on the lift, I had both the pre-cat and post-cat sensors changed for original Bosch ones on both sides of the car. That's four in total! This corrected my original fault completely. All happy there.
There was also an annoying buzzing sound in the cab when driving that I asked them to investigate. It was found some of the bearings in the alternator rollers were making the noise, so I also had changed the Alternator Overrunning Pulley, Alternator Drive Belt, Alternator Tensioning Idler Roller and both the Alternator Deflection Rollers. Again all fixed fine and seem to cure the buzzing sound. All Happy again!
The fault codes while in the garage also showed a fault with the Air Con (this fault was not present when they received the car and faults were first scanned, it only appeared at the end after they had done the O2 sensors. Coincidence??). They advised me that they think the air con system probably needed re-gassing, even though the air-con was working fine the day before in my car. I also noticed the air con radiator fans at the front of the car now come on full pelt from start-up, again they never did before!! Jeez they are nosiy!
I had the aircon re-gassed today at a different place, and the fault is still there and it appears the aircon pump is not coming on, so I have no aircon either, despite it working fine before I put it in the garage for the O2 sensor problem!
10 mins after driving it away from the garage 'PASM INDICATOR FAULTY" appeared on the display. The car was also stuck in sports mode, so it is now a really hard, bumpy ride as I cannot switch it off and there is no response to the switch on the dash. The light on the switch does not even illuminate. I did read up on that online and it said when there is a PASM problem, the car defaults to Sports Mode, which it seemingly has. Awful ride!!
Below is a list of fault codes that were present when they first received the car from me.
P0050 - HO2S Heater Control Circuit, Bank 2 Sensor 1 No Signal
P0154 - O2 Sensor Ciruit No Activity Detected, Bank 2 Sensor 1 No Signal
P0300 - Random/Multiple Misfire Detected Exceeds Limit Value
P0303 - Misfire Cylinder 3 Exceeds Limit Value
P0304 - Misfire Cylinder 4 Exceeds Limit Value
When I left the garage then came back, there were a total of 17 faults left in the system! (TOO MANY TO LIST), including the PASM fault, aircon faults etc etc. You could clear them, but they re-appeared upon restarting the engine. Some took a short drive to appear.
It seems to me the garage may have done something to properly screw up the electrics somewhere!
Anyone got any ideas where I can start to look, especially to get this PASM working so I can get it out of sports mode
Thanks in advance.
Neil
Car went in to local garage (non-OPC) due to an engine management light, and running lumpy at low revs. After investigating and putting it on a diagnostic, it was decided that the O2 sensors were the issue.
Due to them all being massively corroded and while the car was in and up on the lift, I had both the pre-cat and post-cat sensors changed for original Bosch ones on both sides of the car. That's four in total! This corrected my original fault completely. All happy there.
There was also an annoying buzzing sound in the cab when driving that I asked them to investigate. It was found some of the bearings in the alternator rollers were making the noise, so I also had changed the Alternator Overrunning Pulley, Alternator Drive Belt, Alternator Tensioning Idler Roller and both the Alternator Deflection Rollers. Again all fixed fine and seem to cure the buzzing sound. All Happy again!
The fault codes while in the garage also showed a fault with the Air Con (this fault was not present when they received the car and faults were first scanned, it only appeared at the end after they had done the O2 sensors. Coincidence??). They advised me that they think the air con system probably needed re-gassing, even though the air-con was working fine the day before in my car. I also noticed the air con radiator fans at the front of the car now come on full pelt from start-up, again they never did before!! Jeez they are nosiy!
I had the aircon re-gassed today at a different place, and the fault is still there and it appears the aircon pump is not coming on, so I have no aircon either, despite it working fine before I put it in the garage for the O2 sensor problem!
10 mins after driving it away from the garage 'PASM INDICATOR FAULTY" appeared on the display. The car was also stuck in sports mode, so it is now a really hard, bumpy ride as I cannot switch it off and there is no response to the switch on the dash. The light on the switch does not even illuminate. I did read up on that online and it said when there is a PASM problem, the car defaults to Sports Mode, which it seemingly has. Awful ride!!
Below is a list of fault codes that were present when they first received the car from me.
P0050 - HO2S Heater Control Circuit, Bank 2 Sensor 1 No Signal
P0154 - O2 Sensor Ciruit No Activity Detected, Bank 2 Sensor 1 No Signal
P0300 - Random/Multiple Misfire Detected Exceeds Limit Value
P0303 - Misfire Cylinder 3 Exceeds Limit Value
P0304 - Misfire Cylinder 4 Exceeds Limit Value
When I left the garage then came back, there were a total of 17 faults left in the system! (TOO MANY TO LIST), including the PASM fault, aircon faults etc etc. You could clear them, but they re-appeared upon restarting the engine. Some took a short drive to appear.
It seems to me the garage may have done something to properly screw up the electrics somewhere!
Anyone got any ideas where I can start to look, especially to get this PASM working so I can get it out of sports mode
Thanks in advance.
Neil