Warrior193

OP stated the vehicle has stop/start.

There is no need to maintain power during battery replacement. Infotainment settings will be retained. It is important that the new battery is properly adapted (coded) into the vehicles BCM. Any random faults generated on restoration of power will automatically clear after a short drive.

^^^^...unless you have rain closing enabled, in which case windows will close fully if it starts raining.

There is a pretty steep learning curve with these mobile computers nowadays. I wonder how a modern cars computing power compares with The Apollo Space Programme capsules.

Hello, I'm not sure for the MkIV - but check the convenience options menu in the infotainment. There is probably an option (check/tick box) 'Unlock Drivers door' - or 'unlock all doors' in it.

Cue all DSG owners demanding the 'missing' clutch pedal be retrofitted. 🤣

All warning lights should light up during switch on, start up test - does the DPF warning light up then? Have you ever seen this warning indicator in the time you've owned the vehicle? It is possible that the DPF has been 'gutted' or otherwise tampered with before you purchased it.

I don't drive a diesel, but there should be a yellow symbol lit up in the instrument cluster (apparently looks like an exhaust silencer) when a regen is called for - this warning light might be accompanied by the MIL light if there are issues, there will also be a warning text message if the regen is interrupted before it is completed.

Are you saying that DPF regens are not occurring at all?

How often is it calling (and completing) a DPF regen?

Hello Danny, does this stop/start reactivation occur after you stop and shut-off the ignition? That is normal. Was the new battery adapted (coded) into the vehicles BCM?

Even some Tesla users have been caught out in spectacular fashion while in autonomous mode.

I agree that the pressure drop is substantial - the point I was attempting to make was that the pressure loss is not obvious with a visual check, and solely relying on the indirect TPMS to confirm tyre pressures is ill-advised.

I gather that there are two engine power options - 60PS & 70PS. Figures on Parkers for fuel use are 47 to 55 MPG. The manufactures quoted figures are often very difficult to attain - so I'd think your 46.8 is not too bad for 'normal' driving.

Hello Ollie, welcome to the forum. Not familiar with the CityGo - what engine and fuel?

With experience of more than 6 slow punctures, my TPMS consistently flags at approx. 0.5 bar drop. At that pressure (on 16s) the excess sidewall bulge is not that obvious, so better to check pressures with a reliable gauge.

@Occy245 Please don't let one member with a very poor attitude deter you from partaking in the forum.

The 'Ignore' button works ok though.

Reciprocating and rotary parts will start failing almost immediately once lubrication system fails.

I should edit my post to say 'Crank Engine' instead of 'Start ICE' - but too late for edit.

That's not the way the BCM works, maintaining the power only prevents transient faults being generated when the battery is reconnected, which will all clear themselves after a short drive anyway - any battery faults that may be restricting charge from the alternator to the old battery will NOT be cleared by maintaining power while the battery is replaced - nor will any material changes to battery type or capacity be registered to the BCM.

@PetrolDave Can you confirm my belief that stop/start unavailable is not an MOT fail?

Hello, welcome to the forum. I recall the stop/start warning being worded as -'Stop-Start unavailable' ,or something similar - is that the warning you get? AFAIK - (and I stand to be corrected) that is not an MOT failure point. A few questions - - Was the new battery adapted (coded) to the vehicle when it was replaced? - Was the alternator tested at the time for correct output? - Was the correct type of battery fitted?

OP explained originally that he didn't want to further deplete any remaining charge by starting engine while he was unable to drive vehicle to recharge.

Plus, if you don't have memory seats, the mirror dipped position can be a little random.