[QUIKDZL]

I have the JBD CAN tool to read and clear codes, and I am getting some codes that I cannot find the meaning for, along with the occasional SERVICE ENGINE SOON light.

What do these codes mean?
496C
4D16
46A4
4600

[GreekboyD]

Originally Posted by QUIKDZL

I have the JBD CAN tool to read and clear codes, and I am getting some codes that I cannot find the meaning for, along with the occasional SERVICE ENGINE SOON light.

What do these codes mean?
496C
4D16
46A4
4600

Those look very close to DPF related codes. How many clicks on your car?

[QUIKDZL]

46,000. I bought her last June with 30,000 on her. My one-way commute, which I do weekly, is 140 miles, so I'm clocking about 500 miles per week. I absolutely love this car--she's a real beast and I get 42 mpg on my commute!

[Brad335d]

496C - P229F

Information saved in
DDE

Fault code
496C - P229F

Fault text
NOx sensor after DeNOx catalytic converter, plausibility
NOx :

Fault description
Monitoring of NOx offset learning function at NOx sensor 2
(behind SCR). The error is recognized when the learned
NOx offset value ppm rises above the limit value 20 ppm.

Condition for fault identification
Test condition:
Continuous according to defined time grid when the offset
test is enabled:
- Enabled in application 0== 0.
- The test is executed on a falling flank of .
and when the following conditions are satisfied:
- The absolute difference between the maximum ppm and
minimum ppm NOx offset value is less than 2 ppm.
- ppm is greater than 0 ppm.
- The averaged offset value ppm lies within the monitoring
window -30 ppm and 30 ppm.
Voltage condition:
Continuous according to defined time grid when the offset
test is enabled:
- Enabled in application 0== 0.
- The test is executed on a falling flank of .
and when the following conditions are satisfied:
- The absolute difference between the maximum ppm and
minimum ppm NOx offset value is less than 2 ppm.
- ppm is greater than 0 ppm.
- The averaged offset value ppm lies within the monitoring
window -30 ppm and 30 ppm.

Condition for fault memory entry
Event debounced (1)

Action in service
Delete the DTC if the error frequency is 1.
Respond to multiple occurences of this error by replacing the pre-SCR-cat NOx sensor.
Fault effect and breakdown warning
-

Driver information
Warning light:
MIL

Service instruction
-

© 2014 ALLDATA LLC. All rights reserved. Terms and Conditions






4D16 - P20EE

Information saved in
DDE

Fault code
4D16 - P20EE

Fault text
SCR system, efficiency: Efficiency too low

Fault description
Monitoring of NOx efficiency level (entire efficiency
range). The monitoring function links SCR efficiency level
monitoring in efficiency range 1 and efficiency range 2.
The diagnostic trouble code is logged when an error is
detected during monitoring of one of the two ranges.

Condition for fault identification
Test condition:
The monitoring function is active when the conditions for
SCR efficiency monitoring in efficiency range 1 and
efficiency range 2 (according to temperature range) are
satisfied.
Voltage condition:
The monitoring function is active when the conditions for
SCR efficiency monitoring in efficiency range 1 and
efficiency range 2 (according to temperature range) are
satisfied.

Condition for fault memory entry
Event debounced (4)

Action in service
Refill SCR system tank with new fluid (urea quality)
Use diagnostic system to test SCR converter.
Check metering valve.
Check NOx sensors.
Inspect metering module for correct installation position and contamination.
If results of all tests are OK:
Replace SCR converter.

Fault effect and breakdown warning
-

Driver information
Warning light:
MIL

Service instruction
- Urea quality (quality determination): Extract contents from
tank and then refill.
- NOx sensor before or behind SCR converter (indentified
by corresponding diagnostic trouble code entry in ECU error
memory) furnishing implausible data
- Defective SCR converter, check with SCR converter
system test
- Coating on diesel particulate filter (indicated by DTC
4B91)
- Check operation of metering valve.

© 2014 ALLDATA LLC. All rights reserved. Terms and Conditions





46A4 - P229F

Information saved in
DDE

Fault code
46A4 - P229F

Fault text
DDE: NOx sensor after DeNOx cat., plausibility NOx: NOx
signal offset too high at trailing throttle

Fault description
Monitoring of NOx signal offset value (NOx sensor 2
behind SCR). The diagnostic trouble code is logged when
the average offset value exceeds the limit of 30 ppm. The
offset is calculated by averaging the pressure-compensated
signal with the constant 1.

Condition for fault identification
Test condition:
The test routine is executed when the signal flank rises for a
duration of Exh_tiNOxOfsTstVldNoCat2Ds. Within this
time frame the absolute difference between the maximum
and minimum NOx value must be less than 2 ppm. Once the
diagnostic function is enabled the test routine is executed
continuously in accordance with the defined process grid.
Voltage condition:
The test routine is executed when the signal flank rises for a
duration of Exh_tiNOxOfsTstVldNoCat2Ds. Within this
time frame the absolute difference between the maximum
and minimum NOx value must be less than 2 ppm. Once the
diagnostic function is enabled the test routine is executed
continuously in accordance with the defined process grid.

Condition for fault memory entry
Event debounced (1)

Action in service
Use SCR converter system check to analyse NOx sensor 2
(behind SCR converter).
ID0004
ID0005
Replace NOx sensor 2 (behind SCR converter).
Fault effect and breakdown warning
Proceed to the nearest BMW Service facility.

Driver information
Warning light:
MIL

Service instruction
Perform metering diagnosis if indicated.

© 2014 ALLDATA LLC. All rights reserved. Terms and Conditions







4600 - P0087

Information saved in
DDE

Fault code
4600 - P0087

Fault text
DDE: Rail-pressure plausibility pressure-controlled: Positive
control deviation/rail pressure too low

Fault description
Monitoring for positive control deviation (rail pressure too
low) while rail pressure is being regulated by rail-pressure
control valve. The diagnostic trouble code is logged when
the positive control deviation is greater than the limit
defined by the operating point.
The limit is calculated based on engine rpm and lies between
170 bar and 250 bar.

Condition for fault identification
Test condition:
The test routine runs only when the following conditions are
satisfied:
- Rail pressure control with rail-pressure control valve, or
rail pressure control with rail-pressure control valve and
fuel-quantity control valve.
- Monitoring is enabled.
Voltage condition:
The test routine runs only when the following conditions are
satisfied:
- Rail pressure control with rail-pressure control valve, or
rail pressure control with rail-pressure control valve and
fuel-quantity control valve.
- Monitoring is enabled.

Condition for fault memory entry
Debounce (800 ms)

Action in service
Check the following potential problem sources:
- Fuel presupply pressure (low-pressure delivery circuit) is
too low (filter obstructed, leak in low-pressure circuit).
- Rail-pressure sensor indicates incorrect value.
- Leakage in high-pressure circuit.
- Injector is sticking open.
- Worn high-pressure pump.
- Worn injector.
- Leak in rail-pressure control valve.
- Internal leakage in common rail system.
- External leakage in common rail system.
- Air in common rail system.
Investigate potential problem sources, conduct rail-pressure
control system test.

Fault effect and breakdown warning
Output governed.
Proceed to the nearest BMW Service facility.

Driver information
Warning light:
MIL_SVS

Service instruction
none

© 2014 ALLDATA LLC. All rights reserved. Terms and Conditions

[Brad335d]

Hope all that helps you.

[QUIKDZL]

Wow--UDAMAN. How can I get my hands on a complete listing of codes like that? Although my car seems to be running perfectly and gets great fuel economy, these codes are beginning to sound serious. I'd better schedule a dealer visit for this weekend. Thanks a million for the information.

[Brad335d]

Well I have an AllData Pro account so I can look up all sorts of stuff.

I'm looking to make a Sticky where people can post their DTCs and I'll post the info like I did above.

[QUIKDZL]

Even better! Thanks for offering this. I just ordered a BMWhat wifi dongle to use with the iPhone app. I think I'll like it.

[greeksta]

Is this fuel rail pressure low (P0087) a side effect of running JBD at 100%?

Also, having difficulty clearing the code with the BT software and cable. Clear all codes doesn't seem to eliminate the check engine light.

Any advice on either would be greatly appreciated.

[QUIKDZL]

I believe it is. The only time I get this code is when I accelerate a little too aggressively before my engine has reached normal operating temperature. I clear the limp-mode and reduced power warning while driving, and use my handy dandy BMWhat and iPhone to clear the codes when I get to my destination.

I really like the BMWhat (now Carly) app. I have not used the JBD cable since I got it.

[boom]

Sorry to revive an old thread but this came up in my search for the meaning of a 436D code in my 2010 X5D. It comes back immediately upon startup. I can't figure out what it means anywhere. If anyone can help, I'd appreciate it.
Thanks.