Misfiring on all cylinders and multiple sensor issues

[zeah555]

Hi everyone. I drive a Z4 2003 3.0i with a manual transmission. I flew to Hong Kong to go for a vacation for about a month, and when I got back, the battery died so I had to charge it to the nearest shop. When I got it running, it was misfiring especially during cold start and the airbag light was on so I decided to check for codes using carly, then I wasn't expecting all of these.

Misfire and Mixture Adaptation Issues:
- Code 002742: Misfire detection cylinder in 1.zuendreihenfolge / Lambda probe diagnosis heater resistor Vcat bank 1 / Lambda probe diagnosis heater resistance before kat bank 1 / Misfiring cylinder 1 / LIN BUS -globaler coil sensor failure or water pump / DFES DTCM.DFC FMasmin C - mixture adaptation, cumulative error / CDKMD00 - misfire detection Cyl.1 / CDKMD00 - misfire detection Cyl.1 in firing order / LIN bus: communication error

- Code 002743: CDKMD01 - misfire detection cylinder in 2.zuendreihenfolge / Lambda probe diagnosis heater resistor Vcat bank 2 / Intelligent battery sensor LIN communication: timeout / CDKMD01 - misfire detection cylinder 7 / DFES DTCM.DFC FMASnpl C - mixture adaptation, cumulative error / CDKMD01 - misfire detection Cyl.2 / CDKMD01 - misfire detection cylinder 5 / CDKMD01 - misfire detection Cyl.2 in firing order / CDKMD01 - misfire detection Cyl.3 / Lambda probe diagnosis heater resistance before kat bank 2 / Disturbed LIN BUS -communication the battery sensor / Misfiring cylinder 5

- Code 002744: CDKMD02 - misfire detection Cyl.3 in firing order / CDKMD02 - misfire detection Cyl.4 / CDKMD02 - misfire detection cylinder in 3.zuendreihenfolge / Lambda probe heater diagnosis after start Vcat bank 1 / Index 52 inj / Misfiring cylinder 3 / CDKMD02 - misfire detection cylinder 5 / LIN BUS -communication disturbed the water pump / DFES DTCM.DFC FMASsig C - mixture adaptation, cumulative error

- Code 002745: CDKMD03 - misfire detection Cyl.4 in firing order / CDKMD03 - misfire detection Cyl.2 / CDKMD03 - misfire detection cylinder in 4.zuendreihenfolge / Lambda probe heater diagnosis after start Vcat bank 2 / Index 53 inj / CDKMD03 - misfire detection cylinder 11 / Misfiring cylinder 6 / LIN BUS -communication to the water pump implausible / CDKMD03 - misfire detection cylinder 8 / DFES DTCM.DFC framax C - multiplicative mixture adaptation

- Code 002746: DFES DTCM.DFC framin C - multiplicative mixture adaptation / CDKMD04 - misfire detection cylinder 5 in firing order / Misfiring cylinder 2 / CDKMD04 - misfire recognition Cyl. / Lambda probe reference current diagnostic Vcat bank 1 / Lambda probe referenzwiderstandsdiag. Vcat bank 1 / Lambda probe reference resistance diagnosis before kat bank 1 / CDKMD04 - misfire detection Cyl.3 / CDKMD04 - misfire detection cylinder 6

- Code 002747: CDKMD05 - misfire detection cylinder 6 in firing order / CDKMD05 - misfire recognition Cyl. / Misfiring cylinder 4 / Lambda probe reference current diagnostic Vcat bank 2 / Lambda probe referenzwiderstandsdiag. Vcat bank 2 / Lambda probe reference resistance diagnosis before kat bank 2 / CDKMD05 - misfire detection cylinder 9 / CDKMD05 - misfire detection Cyl.3

- Code 00274E: Misfire at a plurality of cylinders / Intelligent battery sensor compatibility: version not plausible / DFES DTCM.DFC FRAUmin C - mixture adaptation, lower speed range / CDKMD - misfire detection, error sum / Lambda probe error nernstleitung Vcat bank 1 / CDKMD - misfire detection sum error / Lambda probe error nernstleitung before kat bank 1 / Intelligent battery sensor firmware implausible

Dynamic Stability Control (DSC) Problems:
- Code 005E18: Coil outlet valve (dump) shorted front left / DSC ECU: ECU internally: data set for peripheral SP interface via proceeds buffer length --- (DSC: control unit internal) / DSC ECU: ECU internally: data amount of the periphery, SP interface via proceeds buffer length. / CAN DME / DDE message implausible / DSC ECU: ECU internally: data set for peripheral SP interface via proceeds buffer length.

- Code 005E19: Coil outlet valve (dump) shorted front right / DSC-ECU: ECU-internal: serial peripheral interface (SPI): ID request not accepted --- (DSC: ECU internal) / DSC-ECU: ECU-internal: serial peripheral interface (SPI): ID request not accepted. / CAN DME / DDE, engine torque not adjustable / DSC-ECU: ECU-internal: serial peripheral interface (SPI): ID request not accepted.

Airbag System Issues:
- Code 0093C9: UPFRONT passenger side / Disconnection of module 3 (STVL)
- Code 009631: Timeout ID 05H (SBSL)

Instrument Cluster and Central Electronics Problems:
- Code 000020: Ignition (KL.15) on but ignition (KL.R) off
- Code 00003D: GM: Boot-lid unlocking: mechanism

Parking Distance Control (PDC) and Central Chassis Electronics:
- Code 009642: PDC 3: too little telegrams
- Code 009639: Timeout ID 0DH (SIM)


It was misfiring in all cylinders and there were a lot of electronic issues. I tried clearing the codes and drove it for 10 minutes, but everything on the engine and mixture issues section came back. The rest hasn't come back yet. I just replaced the spark plugs and cleaned the MAF sensor 4 months ago. I'm pretty sure there's an electrical issue somewhere, I'm not pretty good at troubleshooting electrical issues, but I'm good at following instructions.

Any help would be greatly appreciated.

 

[brillomaster]

how old is the battery? normal advice for electrical issues is start by making sure the battery is good.

if it was fully discharged it was potentially goosed then, so i'd start with a fresh battery and see how it runs then.

was there any bad running before it was parked up? if not, only thing thats really changed is the health of the battery - unless a mouse chewed through a wire while you were on holiday...

 

[zeah555]

The battery's 2 years old. Had it checked at autozone, they charged it and said it was healthy. I also checked the voltages after I got home, everything was good. I tried replacing the plugs again, installed a new set of BKR6EIX. I cleared the codes and drove the car around for 20mins, I checked for codes and no more misfires. I'm only getting a code 0005 SZM Undervoltage, Seat Heating and a 003D Boot lid unlocking mechanism.

I thought everything was resolved but after driving around, went to grab something from a store, shut the car off, and when I came back and started the car, the entire car would shake really badly and would shudder. The weird thing is the RPMs dont fluctuate at all. I remember this happening a couple months ago too. It only happens when the engine's hot. I immediately checked the codes and all the cylinders misfired again. Basically when the engine's warmed up, and I restart the car, the car would shake really bad (all cylinders would misfire). Pressing and releasing the clutch pedal, or revving the engine to 4000rpms would make it go away for the rest of the trip, will never happen again unless I restart the car from a standstill.

 

[deltasierra]

Although the battery is only 2 yrs old they do fail early sometimes, also has the battery ever been allowed to go flat and then been recharged, that reduces capacity a lot, Replacing the battery is easily your cheapest first step, other possibility is loose earth terminial

 

[deltasierra]

Although the battery is only 2 yrs old they do fail early sometimes, also has the battery ever been allowed to go flat and then been recharged, that reduces capacity a lot, Replacing the battery is easily your cheapest first step, other possibility is loose earth terminial.

Reving the engine to 4000 the alternator topped up the battery and it ran fine.

 

[zeah555]

Although the battery is only 2 yrs old they do fail early sometimes, also has the battery ever been allowed to go flat and then been recharged, that reduces capacity a lot, Replacing the battery is easily your cheapest first step, other possibility is loose earth terminial.

Reving the engine to 4000 the alternator topped up the battery and it ran fine.

I just tested the battery using a multimeter. I was getting 12.5v with the car turned off and about 13.9v with the car turned off. I also asked my buddy to start the car while looking at the multimeter. It only jumped down to 11v during crank and shoots up to 13.9v once started.

Your point about the alternator makes sense, but it can also get resolved by stepping on the clutch pedal for about 3 seconds then releasing it. The car would immediately stop shaking as soon as I press on the pedal. Sometimes after depressing it, it shakes immediately as soon as I let go of the clutch and I need to do it a couple more times to go away.

 

[deltasierra]

Put a known good battery on and try it again!