P0300 Misfire Freeze Frame Data

sjwoodwalker

I bought a 2010 370z a couple of months ago. The 2nd day i drove it the CEL came on. I had AutoZone read the codes and it was a P0300. I read up on it and bought new coil packs and spark plugs. I replaced them and the code came back on. I have looked for vacuum leaks and check all the hoses. I bought an Innova 5410 scanner and plugged it in. It read the same code as before and i downloaded the freeze frame data. I have tried to google as much as i could about what everything means but i just can't find anything with the same format as what the scanner put out. If anyone could look over this data and let me know if something doesn't look right or if anyone has the time to kind of explain what everything means, I would really appreciate it. Thank you in advance.

Freeze Frame 10:12 AM 9/6/2020
DTC P0300
Fuel Sys 1 CL
Fuel Sys 2 CL
Calc Load 34.50%
ECT 115°F
STFT B1 0.00%
LTFT B1 0.00%
STFT B2 1.60%
LTFT B2 3.10%
MAP 11 inHg
Eng RPM 1038
Veh Speed 1 mph
Spark Adv 9.0°
IAT 93°F
TPS 4.30%
02S B1 S2 0.28 V
STFT B1 S2 99.20%
02S B2 S2 0.28 V
STFT B2 S2 99.20%
Run Time 48 sec
MIL Dis 0 miles
LAMBDA B1 S1 1
02S B1 S1 2.21 V
LAMBDA B2 S1 0.99
02S B2 S1 2.19 V
Command EVAP 0.00%
Fuel Level 63.50%
Warm-up DTC CIr 2
CIr Dist 9 miles
EVAP_VP 0.0 InH2O
BARO 30 inHg
CAT Te 11 111°F
CAT Te 21 111°F
ECU Volts 14.24 V
LOAD Value 29.00%
EQ Ratio 0.99
Rel TPS 0.00%
TPS B 4.30%
ACC Pedal D 0.00%
ACC Pedal E 0.00%
Command TAC 3.90%
MIL Time 0 hrs, 0 min hours, minutes
CIr Time 0 hrs, 52 min hours, minutes
FUEL_TYP GAS
MAFA 0.81 (lb/min) hours, minutes
MAFB 0.84 (lb/min) hours, minutes

SouthArk370Z

Freeze Frame 10:12 AM 9/6/2020
DTC P0300
Fuel Sys 1 CL = in Closed Loop mode
Fuel Sys 2 CL = in Closed Loop mode
Calc Load 34.50% = load on engine
ECT 115°F = Engine Coolant Temperature
STFT B1 0.00% = Short-Term Fuel Trim for Bank 1 (right side)
LTFT B1 0.00% = Long-Term Fuel Trim for Bank 1 (right side)
STFT B2 1.60% = Bank 2 (left side)
LTFT B2 3.10%
MAP 11 inHg = Manifold Absolute Pressure
Eng RPM 1038
Veh Speed 1 mph
Spark Adv 9.0°
IAT 93°F = Intake Air Temperature
TPS 4.30% = Throttle Position Sensor
02S B1 S2 0.28 V = ?
STFT B1 S2 99.20% = ?
02S B2 S2 0.28 V = ?
STFT B2 S2 99.20% = ?
Run Time 48 sec = how long since you started the engine
MIL Dis 0 miles = how far you've traveled with Malfunction Indicator Light (AKA Check Engine Light) on.
LAMBDA B1 S1 1 = ?
02S B1 S1 2.21 V = ?
LAMBDA B2 S1 0.99 = ?
02S B2 S1 2.19 V = ?
Command EVAP 0.00% = something to do with emissions
Fuel Level 63.50% = how much gas you have
Warm-up DTC CIr 2 = ?
CIr Dist 9 miles = ?
EVAP_VP 0.0 InH2O = more emissions stuff
BARO 30 inHg = atmospheric (AKA BAROmetric) pressure
CAT Te 11 111°F = ? CATalytic converter temp
CAT Te 21 111°F = ?
ECU Volts 14.24 V = supply voltage to ECM
LOAD Value 29.00% = ?
EQ Ratio 0.99 = ?
Rel TPS 0.00% = ?
TPS B 4.30% = ?
ACC Pedal D 0.00% = position of accelerator pedal in cabin ("D" signal)
ACC Pedal E 0.00% = position of accelerator pedal in cabin ("E" signal)
Command TAC 3.90% = ?
MIL Time 0 hrs, 0 min hours, minutes = how long MIL has been on
CIr Time 0 hrs, 52 min hours, minutes = ?
FUEL_TYP GAS
MAFA 0.81 (lb/min) hours, minutes = flow through right side MAF
MAFB 0.84 (lb/min) hours, minutes = flow through left side MAF

items with no desc should be obvious

Edit: Grab a copy of the FSM. Link in my sig. It will explain the parts I didn't know.

__________________
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Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

sjwoodwalker

I appreciate the reply. I guess I should have put these question in the original post, but:

STFT B1 0.00% = Short-Term Fuel Trim for Bank 1 (right side)
LTFT B1 0.00% = Long-Term Fuel Trim for Bank 1 (right side)
STFT B2 1.60% = Bank 2 (left side)
LTFT B2 3.10%

Why is my STFT and LTFT B1 both at 0.00%? Should it be reading something like the bank 2s?

Also on the O2 sensors and A/F Sensors, what is the correct voltage for those? I had read they were supposed to be below .8v

Thanks again!

SouthArk370Z

I don't know. That info will probably be in the FSM. Or wait for someone who is more knowledgeable than myself to pipe up.

__________________
Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub
Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

Jhill

You got it backwards, your B2 ideally should be more like your B1. Your B1 is doing zero corrective action so it’s mapping based off the MAF and then feedback from the AFR sensor is perfect. Your B2 is either under reporting air from MAF, slight vacuum leak, exhaust leak before AFR etc making it have to correct and add fuel. Although 3% isn’t a huge variation.

As to it being related to your misfire, I doubt it.

sportsman2003

Most often the P0300 is un-metered air flow be sure all of your air intake clamps are tight and hoses are seated properly. Do you have an aftermarket cold air intake on the car?

sjwoodwalker

Yes but I installed it after the first time it can on thinking it might fix it if there was a problem with the stock intake.

sjwoodwalker

Thank you for you're help!