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Hi all,
maybe someone will be able to determine from the graphs?
This is the schedule of a 5-minute trip. During the trip, Check Engine + PCM error was triggered 3 times
I am confused by the jumps on the Throttle position chart.. aren't they too high? it feels like errors fly out at the moments of these jumps on the chart. this is a 5-minute ride without sharp accelerations, just a warm-up ride (although on a hilly road).
There are the remaining 60 graphs that obd2 reads, I can supplement
Last edited by VVayfarer; Sep 24, 2021 at 02:36 PM.
That looks very odd. What do the codes from the CELs say. Anything aftermarket installed like a Sprint Booster or similar?
the car is completely in the factory configuration
absolutely no tuning
Car Scanner ELM OBD2 DTC report Selected brand: Porsche
============1============== P0172 Raw code: 0172 ECU: Engine control unit Status: Pending OBDII: System too rich, bank 1
============2============== P0301 Raw code: 0301 ECU: Engine control unit Status: Pending OBDII: Cylinder 1 - misfire detected
============3============== P0302 Raw code: 0302 ECU: Engine control unit Status: Pending OBDII: Cylinder 2 - misfire detected
============4============== P0303 Raw code: 0303 ECU: Engine control unit Status: Pending OBDII: Cylinder 3 - misfire detected
============5============== P0300 Raw code: 0300 ECU: Engine control unit Status: Pending OBDII: Random/multiple cylinder(s) - misfire detected
============6============== P1638 Raw code: 1638 ECU: Engine control unit Status: Pending OBDII: Can Link ECM/INSTM Circuit / Network Malfunction
============7============== P0172 Raw code: 0172 ECU: 01. Engine control unit Status: Pending fault present during this driving cycle, Test has not been completed, Validated and stored in non volatile memory, Validated fault present at time of request OBDII: System too rich, bank 1
============8============== P0301 Raw code: 0301 ECU: 01. Engine control unit Status: Pending fault present, Validated and stored in non volatile memory, Validated fault present at time of request OBDII: Cylinder 1 - misfire detected
============9============== P0302 Raw code: 0302 ECU: 01. Engine control unit Status: Pending fault present, Validated and stored in non volatile memory, Validated fault present at time of request OBDII: Cylinder 2 - misfire detected
============10============== P0303 Raw code: 0303 ECU: 01. Engine control unit Status: Pending fault present, Validated and stored in non volatile memory, Validated fault present at time of request OBDII: Cylinder 3 - misfire detected
============11============== P0300 Raw code: 0300 ECU: 01. Engine control unit Status: Pending fault present, Validated and stored in non volatile memory, Validated fault present at time of request OBDII: Random/multiple cylinder(s) - misfire detected
============12============== P1638 Raw code: 1638 ECU: 01. Engine control unit Status: Pending fault present during this driving cycle, Validated and stored in non volatile memory OBDII: Can Link ECM/INSTM Circuit / Network Malfunction
============13============== P2800 Raw code: 2800 ECU: 01. Engine control unit Status: Test is inhibited by other DTC, Test has not been completed, Validated and stored in non volatile memory OBDII: Transmission range (TR) sensor B - PRNDL input
============14============== B2C12 Raw code: AC12 ECU: 01. Engine control unit Status: Pending fault present, Test is inhibited by other DTC, Test has not been completed, Validated and stored in non volatile memory, Validated fault present at time of request
============15============== P1C0B Raw code: 1C0B ECU: 01. Engine control unit Status: Pending fault present
============16============== C3202 Raw code: 7202 ECU: 01. Engine control unit Status: Test is inhibited by other DTC, Validated and stored in non volatile memory
============17============== P0038 Raw code: 0038 ECU: 01. Engine control unit Status: Pending fault present, Pending fault present during this driving cycle, Test conditions are met, Test is inhibited by other DTC, Validated and stored in non volatile memory, Validated fault has been present during this drive cycle OBDII: Heated oxygen sensor (HO2S) 2, bank 1, heater control - circuit high
============18============== C177C Raw code: 577C ECU: 01. Engine control unit Status: Pending fault present during this driving cycle, Test is inhibited by other DTC
============19============== P0103 Raw code: 0103 ECU: 01. Engine control unit Status: Pending fault present OBDII: Mass air flow (MAF) sensor/volume air flow (VAF) sensor - high input
============20============== P0128 Raw code: 0128 ECU: 01. Engine control unit OBDII: Coolant thermostat - coolant temperature below thermostat regulating temperature
============21============== P38C1 Raw code: 38C1 ECU: 01. Engine control unit Status: Pending fault present during this driving cycle, Test has not been completed
============22============== P0301 Raw code: 0301 ECU: Engine control unit Status: Pending OBDII: Cylinder 1 - misfire detected
============23============== P0302 Raw code: 0302 ECU: Engine control unit Status: Pending OBDII: Cylinder 2 - misfire detected
============24============== P0303 Raw code: 0303 ECU: Engine control unit Status: Pending OBDII: Cylinder 3 - misfire detected
============25============== P0300 Raw code: 0300 ECU: Engine control unit Status: Pending OBDII: Random/multiple cylinder(s) - misfire detected
============26============== P0301 Raw code: 0301 ECU: 01. Engine control unit Status: Pending fault present, Validated and stored in non volatile memory, Validated fault present at time of request OBDII: Cylinder 1 - misfire detected
============27============== P0302 Raw code: 0302 ECU: 01. Engine control unit Status: Pending fault present, Validated and stored in non volatile memory, Validated fault present at time of request OBDII: Cylinder 2 - misfire detected
============28============== P0303 Raw code: 0303 ECU: 01. Engine control unit Status: Pending fault present, Validated and stored in non volatile memory, Validated fault present at time of request OBDII: Cylinder 3 - misfire detected
============29============== P0300 Raw code: 0300 ECU: 01. Engine control unit Status: Pending fault present, Validated and stored in non volatile memory, Validated fault present at time of request OBDII: Random/multiple cylinder(s) - misfire detected
============30============== P2800 Raw code: 2800 ECU: 01. Engine control unit Status: Test is inhibited by other DTC, Test has not been completed, Validated and stored in non volatile memory OBDII: Transmission range (TR) sensor B - PRNDL input
============31============== U0823 Raw code: C823 ECU: 01. Engine control unit Status: Pending fault present, Test is inhibited by other DTC, Test has not been completed, Validated and stored in non volatile memory, Validated fault present at time of request
============32============== P3201 Raw code: 3201 ECU: 01. Engine control unit Status: Pending fault present, Pending fault present during this driving cycle
============33============== P0001 Raw code: 0001 ECU: 01. Engine control unit Status: Test is inhibited by other DTC, Validated and stored in non volatile memory OBDII: Fuel volume regulator control - open circuit
============34============== P0038 Raw code: 0038 ECU: 01. Engine control unit Status: Test is inhibited by other DTC, Validated fault present at time of request, Validated fault has been present during this drive cycle OBDII: Heated oxygen sensor (HO2S) 2, bank 1, heater control - circuit high
============35============== P2379 Raw code: 2379 ECU: 01. Engine control unit Status: Pending fault present during this driving cycle, Test has not been completed, Validated and stored in non volatile memory
============36============== P0103 Raw code: 0103 ECU: 01. Engine control unit Status: Pending fault present, Pending fault present during this driving cycle OBDII: Mass air flow (MAF) sensor/volume air flow (VAF) sensor - high input
============37============== P0128 Raw code: 0128 ECU: 01. Engine control unit OBDII: Coolant thermostat - coolant temperature below thermostat regulating temperature
============38============== P38C8 Raw code: 38C8 ECU: 01. Engine control unit Status: Pending fault present, Test conditions are met, Test is inhibited by other DTC
Year and model? Has the car sat for a period of time where the battery might be low? If you hold the throttle mostly steady do you see the same Throttle Position Sensor spikes. Do the MAF readings jump around on their own? I'm thinking it's a low battery, MAF failing, or Throttle Position Sensor failing.
Year and model? Has the car sat for a period of time where the battery might be low? If you hold the throttle mostly steady do you see the same Throttle Position Sensor spikes. Do the MAF readings jump around on their own? I'm thinking it's a low battery, MAF failing, or Throttle Position Sensor failing.
997.2 turbo , year 2011
the battery was replaced with a new one, after that all the errors were reset many times. But the errors come back after a short ride.
Usually it is a misfire of 4-5-6 cylinders, sometimes on the contrary 1-2-3 cylinders. Once there was a misfire 1-2-3-4-5-6.
+ a set of random errors that changes from time to time.
First of all, I changed the MAF. Without results. In addition, if MAF is disabled completely, then this does not help either.
Now I have changed the throttle to a new one. And this also did not change the situation in any way.
Another of the symptoms. When the engine is cold, the engine speed floats when warming up. After warming up, they are stabilized.
Hello, was reading your thread I’ve come across what seems to be the exact same problem as you. I’ve replaced all the same parts as you to the same result no change did you ever figure out what was wrong. Kind regards maxwell
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PSM error + Check Engine
