Warrior193

I can recall inadvertent hand brake release being an issue quite some time ago - it was found that keeping the release button depressed while pulling up the lever was preventing the pawl from engaging fully at the bottom of the ratchet teeth.

I believe that keeping the release button depressed while pulling the lever up has been found to be the cause of inadvertent hand brake releases in the past - the correct method is to pull the lever up without touching the release button.

Battery adaptation (coding) requires VCDS or OBD11 device to input new battery details into the vehicles BCM. It is recommended to do it to ensure any existing battery defects that may be affecting alternator charging, are cleared - even if replacement battery is identical type and capacity to original. Battery adaptation is a particular requirement if the replacement battery differs in any way from the original. There is a register on this forum of members who may be near you and available to do this adaptation for you. Some retail battery outlets are able to do the adaptation.

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?