Engine Management Light on and Error Codes

asalhan

Member
VCDS Map User
Hi guys,

The Engine Management Light came on while I was getting on the motorway. The glow plug light was flashing too.

I stopped the car and restarted it, the flashing glow plug light went away but the Engine Management Light stayed on. I didn't have my Ross-Tech cable with me so I had to wait to get home and the following day, these errors came up:

Address 01: Engine (J623-CNHA) Labels:. 04L-907-309-V1.clb
Part No SW: 04L 906 021 FE HW: 04L 907 309
Component: R4 2,0L EDC H23 7709
Revision: 85H23---
Coding: 12194012242401080000
Shop #: WSC 02391 785 00200
ASAM Dataset: EV_ECM20TDI01104L906021FE 001006
ROD: EV_ECM20TDI01104L906021FE_001.rod
VCID: 6D8734E61D1AAC4FAA1-8038

5 Faults Found:
21378 - Reductant Metering Module
P20FE 00 [096] - Malfunction
Intermittent - Not Confirmed - Tested Since Memory Clear

18111 - Oxygen (Lambda) Sensor B1 S1
P2237 00 [237] - Pump Current Open Circuit
MIL ON - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 49
Mileage: 180180 km
Date: 2018.07.13
Time: 08:26:37

Engine speed: 831.50 /min
Normed load value: 32.5 %
Vehicle speed: 0 km/h
Coolant temperature: 91 °C
Intake air temperature: 66 °C
Ambient air pressure: 1010 mbar
Voltage terminal 30: 13.040 V
Unlearning counter according OBD: 40
Oxyg.sens.bank 1 before oxi cat: sign. qual. pump curr.regul.: 14
Oxyg.sensor bank 1 before oxi cat: signal quality temp regulat.: 6
O2 sen. bank 1 upstrm oxi cat: elec. correct. pump current: 0.0000000 A
Oxygen sensor bank 1 before oxi cat: heater activation: 4.205 %
O2 sen. bank 1 upstrm oxi cat: elec. corrected Urie sen. value: 1.1354 V
Oxygen sensor bank 1 before oxi cat: adjustable resistor: 87.9 Ohm
Oxyg.sensor bank 1 before oxi cat: curr.pump curr.adaptation: 1.0391

19226 - Particulate Trap Bank 1
P2002 00 [096] - Efficiency Below Threshold
Intermittent - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Mileage: 187637 km
Date: 2018.09.14
Time: 16:57:48

Engine speed: 2146.50 /min
Normed load value: 31.8 %
Vehicle speed: 79 km/h
Coolant temperature: 91 °C
Intake air temperature: 82 °C
Ambient air pressure: 1010 mbar
Voltage terminal 30: 13.480 V
Unlearning counter according OBD: 27
Exhaust mass flow of low-pressure EGR: calculated: 3.021
Differential pressure ratio: low-pressure EGR: 24.7 kg/h
Exh.recircul. 2: differential pres.sensor 1 bank 1: adap. value: 32.7 hPa
Exhaust recirculat.2: different.press.sens.1 bank 1: raw value: 34.8 hPa
Exh.recircul.valve 1 bank 1: pos.feedback - Act.value: 71.50 %
Exhaust recirc.valve 2 bank 1: posit.feedback - Act.value: 43.76 %
Exh. gas recirc. 2: diff. press. sensor 1 bank 1: dyn. value: 29.0 hPa

16925 - Reductant Level Sensor
P203B 00 [032] - Implausible Signal
Intermittent - Not Confirmed - Tested Since Memory Clear

25221 - EGR System
P0402 00 [096] - Excessive Flow
Intermittent - Not Confirmed - Tested Since Memory Clear

Readiness: 1 1 0 0 0

It looks worrying to me as the car is no longer in warranty or anything like that (it's a 2014). I've did a bit of reading on it but nothing is conclusive. Can anyone help with what I can/should try to do to help with these error codes?

The car still runs fine, probably down on power a little bit, never gone into limp mode or anything.

Thanks in advance.
 

Santoku

Registered User
I am not a mechanic, so take my observation with a grain of salt. However, multiple sensor faults can often be the result of a cascading effect of one malfunctioning sensor or part. One possibility I see is that the Exhust Gas Recirculation (EGR) valve may be stuck partially open, maybe due to buildup of residual particulate being recirculated over time. This would throw off the post-combustion fuel-air mixture the oxygen sensors are monitoring for. Poor fuel-air mixture resulting from too much exhaust gas being introduced could then lead to reduced power. Just a thought .
 

asalhan

Member
VCDS Map User
Yea I know what you mean and thanks for sharing your opinion.
I just wish I could find a guide on how to remove the EGR myself and try to give it a good clean. I am kind of surprised at this as I do a hell of a lot of motorway miles.
 

EddieAudi

Registered User
Hi asalhan, hope you're well. Did you manage to get to the bottom of the fault codes and understand what was causing the issue? I'm having the same problem and would be very grateful for any help. Thanks
 

asalhan

Member
VCDS Map User
Hi Eddie

Yea the MIL was on because of the oxygen sensor. Once that was replaced, the MIL disappeared. Have you done a scan of your car to see exactly what the errors are?

The EGR error hasn’t shown its head in a while but I think both errors are related. The EGR being clogged might be affecting the oxygen sensor. It’s just an assumption, so don’t take that as gospel.
 

EddieAudi

Registered User
Thanks asalhan,

Really appreciate your response. I fear it may be a blocked EGR.

I've posted the error codes below. I take it you don't know how difficult it is to remove the EGR valve to clean? Or even if you have any thoughts on whether this looks to be the issue?

Thanks

3 Faults Found:

18111 - Oxygen (Lambda) Sensor B1 S1

P2237 00 [096] - Pump Current Open Circuit

Intermittent - Not Confirmed - Tested Since Memory Clear

Freeze Frame:

Fault Status: 00000001

Fault Priority: 2

Fault Frequency: 6

Mileage: 207389 km

Date: 2019.07.19

Time: 09:10:42


Engine speed: 1483.00 /min

Normed load value: 78.4 %

Vehicle speed: 41 km/h

Coolant temperature: 44 °C

Intake air temperature: 46 °C

Ambient air pressure: 1010 mbar

Voltage terminal 30: 14.540 V

Unlearning counter according OBD: 21

Oxyg.sens.bank 1 before oxi cat: sign. qual. pump curr.regul.: 14

Oxyg.sensor bank 1 before oxi cat: signal quality temp regulat.: 6

O2 sen. bank 1 upstrm oxi cat: elec. correct. pump current: 0.0000000 A

Oxygen sensor bank 1 before oxi cat: heater activation: 0.073 %

O2 sen. bank 1 upstrm oxi cat: elec. corrected Urie sen. value: 1.9776 V

Oxygen sensor bank 1 before oxi cat: adjustable resistor: 80.1 Ohm

Oxyg.sensor bank 1 before oxi cat: curr.pump curr.adaptation: 1.1421


19226 - Particulate Trap Bank 1

P2002 00 [104] - Efficiency Below Threshold

Intermittent - Confirmed - Tested Since Memory Clear

Freeze Frame:

Fault Status: 00000001

Fault Priority: 2

Fault Frequency: 26

Mileage: 207382 km

Date: 2019.07.18

Time: 10:09:19


Engine speed: 1709.00 /min

Normed load value: 49.0 %

Vehicle speed: 22 km/h

Coolant temperature: 90 °C

Intake air temperature: 61 °C

Ambient air pressure: 970 mbar

Voltage terminal 30: 14.540 V

Unlearning counter according OBD: 40

Exhaust mass flow of low-pressure EGR: calculated: 3.021

Differential pressure ratio: low-pressure EGR: 24.3 kg/h

Exh.recircul. 2: differential pres.sensor 1 bank 1: adap. value: 30.9 hPa

Exhaust recirculat.2: different.press.sens.1 bank 1: raw value: 30.3 hPa

Exh.recircul.valve 1 bank 1: pos.feedback - Act.value: 65.15 %

Exhaust recirc.valve 2 bank 1: posit.feedback - Act.value: 41.21 %

Exh. gas recirc. 2: diff. press. sensor 1 bank 1: dyn. value: 29.5 hPa


9645 - Reductant

P20E8 00 [104] - Pressure too Low

Intermittent - Confirmed - Tested Since Memory Clear

Freeze Frame:

Fault Status: 00000001

Fault Priority: 2

Fault Frequency: 1

Mileage: 207540 km

Date: 2019.07.22

Time: 10:05:06


Engine speed: 1045.50 /min

Normed load value: 34.5 %

Vehicle speed: 11 km/h

Coolant temperature: 26 °C

Intake air temperature: 16 °C

Ambient air pressure: 980 mbar

Voltage terminal 30: 13.960 V

Unlearning counter according OBD: 4

Extern.temp.sens.1 bank 1: raw value: 2.0 °C

Pressure sensor for reducing agent: measured pressure: 22 hPa

Sensor for reducing agent tank temperature: temperature: 2.3 °C

Reducing agent pump: activation: 50.00 %

Sensor for reducing agent fill level: voltage: 1435.0 mV


Readiness: 0 2 0 0 0
 

asalhan

Member
VCDS Map User
It may well be. I’d replace the cheapest item first which is the oxygen sensor. It’s right in front of you when you open the bonnet. It’s easy to get to and even easier to replace. That will at least get rid of that error. I found one on eBay for about £20.
If you need help locating yours then give me a shout.

Your EGR does look like it’s had better days. If you need to replace it then they’re not that bad to get hold of. It’s the actual job that’s more daunting than anything. I’m thinking of doing mine. I just need to figure out how long it will take me and if it’s something I can even do.

Don’t forget to order some new gaskets as you can’t reuse old ones.
 
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