Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[steve6367]

Emmision Control Light is on and the below is stored - any thoughts?

Fault code  Code status  Code type  Definition
P0140          Stored          Generic  O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 2)
P1650          Pending         Multiple definitions available:
  Mfr-spec  Fuel injection pump control module - CAN data bus malfunction
  Mfr-spec  Malfunction Indicator lamp (MIL) - circuit malfunction
  Mfr-spec  Service indicator - circuit malfunction
       
 

--------------------------------------------------------------------------------
 
Freeze Frame data
Fault code  Sensor  Value
P0140  Sensor values:   
 Calculated Load  21.57 %
 Coolant Temperature  82. C
 Short Term Fuel Trim Bank 1  0. %
 Long Term Fuel Trim Bank 1  -11.72 %
 Short Term Fuel Trim Bank 2  -100. %
 Engine Speed  1700 rpm
 Vehicle Speed  79 km/h
 Ignition Timing Advance  63.50 º
 Intake Air Temperature  36.00 ºC
 Air Flow Rate (MAF)  0.00 g/s
 Absolute Throttle Position  7.06 %
 Oxygen Sensor 1 - Bank 1 voltage  0.42 V
 Oxygen Sensor 2 - Bank 1 voltage  0.42 V
 Fuel System 1 Status  Open Loop (accelerating)

Some live data screen shots to follow shortly. (now below)

Transmission Control Module - the car is also reluctant to change 2nd > 3rd once warm - always works fine when cold. If you blip throttle it will change up.










 

[steve6367]

The last photo is at idle in N with aircon off so 'calculated load' seems a little high?

[steve6367]

Any thoughts anyone? 

[steve6367]

So should I take PO140 literally and change that sensor? Even though it seems to be working in the live data. I note in the freeze frame the MAF is 0.0 g/s which seems wrong.

What MAF g/s would I be expecting at different RPM on a 2.2?

Steve

[Kevin Wood]

Hmm. P0140 isn't listed for the 2.2.

As you say, O2 sensor activity looks normal, although fuel trim is a little high.

P1650 relates to the engine management light circuit. Might be worth checking if the bulb is OK.

Regarding the transmission error, I would check the connectors on the gearbox ECU, the large multiway connectors behind the battery and those that attach to the auto gearbox are OK in the first instance. Give them a squirt of switch cleaner and a good waggle. Failing that I'll see if there's a procedure for checking the solenoid function.

[steve6367]

Thanks - will check the dash light and connections tomorrow and report back.

Does the MAF reading look sensible to you?

Steve

[steve6367]

Can anyone tell me if the MAF readings below look sensible with RPM?

Also what is calculated load? It seems very high given its just idling / reving out of gear.





Have reseated the connectors above for gearbox, cleared codes from TCU and they come back imediatly - off to get some switch cleaner and try again.

Since clearing the ECU codes - I have 1650 and nothing else.

Steve

[Andy H]

Does the engine management light actually work? (not that I can imagine it causing any symptoms if it doesn't).

A little while ago people started posting their live data to help in this type of situation (I think JimBob was one). I don't remember whether anyone posted any data for a 4 pot though

Data for a 4 pot 2.2 & a v6 2.5 can't be that different can it ?...........

[steve6367]

No its not working - will pop clocks out tomorrow and see if just bulb :-)

[steve6367]

Reading through previouse owners history tonight it seems the MAF was changed in 03-2011 for a "airflow meter vauxhall 1.6/1.8 £24.99" from "Fiesta-centre (Auto-Sensors).

So I imagine not GM.....

[steve6367]

Engine management light was just bulb, so that was an easy fix :-)

Still trying to find out if my MAF readings and calculated load are good - anyone have any data from another 2.2?

I have a spreadsheet of all the live data from a reasonable drive if anyone is really keen!

Steve

[steve6367]

After a couple of hundred miles, light back on and code back. Light came on at lift off when aproaching round about on dual carrageway. Again the recorded MAF reading is 0.0 g/s which seems strange. I am still not sure the MAF readings at idle look right either.

Does anyone have an 2.2 data to compare? Any tests I should be running?

Thanks

Steve


      Fault codes
            Fault code Code status Code type Definition
            P0140 Stored Generic O2 Sensor Circuit No Activity Detected (Bank 1
            Sensor 2)
           
      Freeze Frame data
            Fault code Sensor Value
            P0140 Sensor values:
            Calculated Load 18.43 %
            Coolant Temperature 86. C
            Short Term Fuel Trim Bank 1 0. %
            Long Term Fuel Trim Bank 1 -12.5 %
            Short Term Fuel Trim Bank 2 -100. %
            Engine Speed 1850 rpm
            Vehicle Speed 51 mph
            Ignition Timing Advance 63.50 º
            Intake Air Temperature 2.00 ºC
            Air Flow Rate (MAF) 0.00 g/s
            Absolute Throttle Position 7.45 %
            Oxygen Sensor 1 - Bank 1 voltage 0.41 V
            Oxygen Sensor 2 - Bank 1 voltage 0.42 V
            Fuel System 1 Status Open Loop (accelerating)

[Andy H]

Were you travelling at 51mph when you took that freeze frame?

Short term trim of 100% says (to me) that the ECU is running closed loop and is desperately trying to correct for an over-lean mixture by applying 100% correction.

Why that should be the case is the key 

0.0 g/s at idle cannot be correct. Whether the pattern? MAF is faulty or whether there is an intermittent wiring fault that caused the previous MAF to be condemned is for you to find out...........

[Andy H]

Not had much luck finding what your idle mass flow should be but a very rough guide seems to be about 1g/s for each litre of engine capacity (ie 3.0 litre engine - 3.0 g/s or 10.8 kg/hr,  2.2 litre engine 2.2g/s or 7.9 kg/hr).

Don't shoot me if this is wrong. Usually someone who actually knows the answer would have posted by now

[steve6367]

The car took the freeze frame when the fault was logged - I read it when I got home. Yes the light came on and the fault and data was logged at 51mpg as I lifted off the slow for a roundabout.

I think "Short term trim bank 2" is not applicable to this engine - being a 4 pot it only has one bank so I think it is the bank 1 values I need to look at.

I can't see how the MAF can be 0.0 g/s when the engine is doing 1850rpm however.

Thanks for your rough numbers - seems my idle reading is high if they are correct, which could also expelling 36% calculated engine load at idle?

Steve