P0660, P1043, P0420, P0430 on 2006 C2S (X51)

[Michael Spross]

Good morning, I'm looking for any assistance I can get into this matter.

Recently picked up a 2006 C2S, with the Carrera Power Kit (X51), and it has about 22,000 miles.

Car has been running fantastic, until the other day threw the check engine light. I ran a scan, using the Durametric, and below are the results that I'm most concerned about (There were a few others, which I'll try to address later).

I've done quite a bit of research, but basically I'm back to square one. I do have the service manuals, but am having trouble locating what exactly the issue is. Car is still running fine (to me), but would like to get these addressed before a bigger problem occurs. Any help or assistance would be greatly appreciated.

Note, I believe P0420 and P0430 are being thrown due to the Fabtech aftermarket exhaust that is installed. I'm thinking that I can install some spacers for the O2 sensors to help alleviate this issue. Please advise if I'm correct.

The log of the codes is as follows: (P0660, P1043, P0420, P0430).

Bosch Digital Motor Electronics Motronic 7.8.1

Module Identification






Part Number 997.618.624.06
Supplier Part Number 00419100A822

Current Fault Codes


P0660
Intake pipe switchover final stage
Freeze Frame Information
Fault symptom open circuit
Self test not complete
Fault status fault not present
Warning light off
Fault path num 50176
FLC/HLC state 10
Fault check state 0A
FCM line status 00
FCM output data (mil, svs) 44
Error Path Status 1537
Counter Continuous Error 0
Counter Accumulated Error 65280
MIL on counter 255
MIL off counter 12
Clear counter 40
Frequency counter 1
Calculated LOAD value 91 %
Engine coolant temperature 72 °C
Short Term Fuel Trim - Bank 1 0 %
Long Term Fuel Trim - Bank 1 0 %
Short Term Fuel Trim - Bank 2 0 %
Long Term Fuel Trim - Bank 2 0 %
Vehicle speed sensor 0 km/h
Ignition Timing Advance for #1 Cylinder 0 °
Intake Air Temperature 37 °C
Absolute Throttle Position 13 %
Commanded Secondary Air Status 04
Commanded Evaporative Purge 0 %
Barometric Pressure 1000 kPa
Relative Throttle Position 1 %
Ambient air temperature 3 °C
Absolute Throttle Position B 12 %
Commanded Throttle Actuator Control 2 %
Long term secondary oxygen sensor fuel trim - Bank 1 0 %
Long term secondary oxygen sensor fuel trim - Bank 2 0 %
Fuel system 1 status 067F
Engine RPM 128 rpm
Air Flow Rate from Mass Air Flow Sensor 2 g/s
Absolute Load Value 46 %
Total operating time (first occurrence) 760.3 h
Total mileage (first occurrence) 36186 km


P1043
Exhaust flap control final stage
Freeze Frame Information
Fault symptom open circuit
Self test not complete
Fault status fault not present
Warning light off
Fault path num 50432
FLC/HLC state 10
Fault check state 0A
FCM line status 00
FCM output data (mil, svs) 44
Error Path Status 1537
Counter Continuous Error 0
Counter Accumulated Error 65280
MIL on counter 255
MIL off counter 12
Clear counter 40
Frequency counter 1
Calculated LOAD value 91 %
Engine coolant temperature 72 °C
Short Term Fuel Trim - Bank 1 0 %
Long Term Fuel Trim - Bank 1 0 %
Short Term Fuel Trim - Bank 2 0 %
Long Term Fuel Trim - Bank 2 0 %
Vehicle speed sensor 0 km/h
Ignition Timing Advance for #1 Cylinder 0 °
Intake Air Temperature 37 °C
Absolute Throttle Position 13 %
Commanded Secondary Air Status 04
Commanded Evaporative Purge 0 %
Barometric Pressure 1000 kPa
Relative Throttle Position 1 %
Ambient air temperature 3 °C
Absolute Throttle Position B 12 %
Commanded Throttle Actuator Control 2 %
Long term secondary oxygen sensor fuel trim - Bank 1 0 %
Long term secondary oxygen sensor fuel trim - Bank 2 0 %
Fuel system 1 status 067F
Engine RPM 128 rpm
Air Flow Rate from Mass Air Flow Sensor 2 g/s
Absolute Load Value 46 %
Total operating time (first occurrence) 760.3 h
Total mileage (first occurrence) 36186 km


P0430
Bank 2 catalytic converter system insufficient effect
Freeze Frame Information
Fault symptom below limit
Self test not complete
Fault status fault not present
Warning light off
Fault path num 29696
FLC/HLC state 10
Fault check state 0B
FCM line status 10
FCM output data (mil, svs) 22
Error Path Status 769
Counter Continuous Error 0
Counter Accumulated Error 512
MIL on counter 2
MIL off counter 3
Clear counter 40
Frequency counter 5
Calculated LOAD value 28 %
Engine coolant temperature 63 °C
Short Term Fuel Trim - Bank 1 0 %
Long Term Fuel Trim - Bank 1 4 %
Short Term Fuel Trim - Bank 2 -1 %
Long Term Fuel Trim - Bank 2 5 %
Vehicle speed sensor 67 km/h
Ignition Timing Advance for #1 Cylinder 42 °
Intake Air Temperature 18 °C
Absolute Throttle Position 18 %
Commanded Secondary Air Status 04
Commanded Evaporative Purge 0 %
Barometric Pressure 980 kPa
Relative Throttle Position 5 %
Ambient air temperature 4 °C
Absolute Throttle Position B 17 %
Commanded Throttle Actuator Control 7 %
Long term secondary oxygen sensor fuel trim - Bank 1 0 %
Long term secondary oxygen sensor fuel trim - Bank 2 0 %
Fuel system 1 status 147F
Engine RPM 2432 rpm
Air Flow Rate from Mass Air Flow Sensor 20 g/s
Absolute Load Value 51 %
Total operating time (first occurrence) 748.7 h
Total mileage (first occurrence) 36192 km


P0420
Bank 1 catalytic converter system insufficient effect
Freeze Frame Information
Fault symptom below limit
Self test not complete
Fault status fault not present
Warning light off
Fault path num 29440
FLC/HLC state 00
Fault check state 0D
FCM line status 10
FCM output data (mil, svs) 22
Error Path Status 768
Counter Continuous Error 0
Counter Accumulated Error 512
MIL on counter 2
MIL off counter 2
Clear counter 40
Frequency counter 3
Calculated LOAD value 35 %
Engine coolant temperature 87 °C
Short Term Fuel Trim - Bank 1 4 %
Long Term Fuel Trim - Bank 1 2 %
Short Term Fuel Trim - Bank 2 2 %
Long Term Fuel Trim - Bank 2 3 %
Vehicle speed sensor 93 km/h
Ignition Timing Advance for #1 Cylinder 41 °
Intake Air Temperature 31 °C
Absolute Throttle Position 19 %
Commanded Secondary Air Status 04
Commanded Evaporative Purge 0 %
Barometric Pressure 980 kPa
Relative Throttle Position 7 %
Ambient air temperature 21 °C
Absolute Throttle Position B 18 %
Commanded Throttle Actuator Control 9 %
Long term secondary oxygen sensor fuel trim - Bank 1 0 %
Long term secondary oxygen sensor fuel trim - Bank 2 0 %
Fuel system 1 status 197F
Engine RPM 2304 rpm
Air Flow Rate from Mass Air Flow Sensor 26 g/s
Absolute Load Value 55 %
Total operating time (first occurrence) 750.2 h
Total mileage (first occurrence) 36192 km

[Loren]

:welcome:

P0660 Electric tuning flap

Possible fault causes

- Short circuit to B+/ground or open circuit in the control line

- Open circuit of power supply to tuning flap solenoid valve

- Tuning flap solenoid valve faulty

- DME control module faulty

P1043 Electric air cleaner flap

Possible fault causes

- Short circuit to B+/ground or open circuit in the control line

- Open circuit of power supply to air cleaner flap solenoid valve

- Air cleaner flap solenoid valve faulty

- DME control module faulty

These look like a problem with the air cleaner/intake flap.

For the O2 sensor faults - try clearing the faults, re-install the stock mufflers (or least the stock carts) and see if the problem persists.

If not you will need to find an exhaust setup that does not cause O2 sensor faults.

[Ahsai]

Welcome to Renntech!

Does the aftermarket exhaust also include aftermarket catalytic converters? Any photos of the setup?

[Michael Spross]

Thanks for the welcome gentlemen!

Ahsai, I'll get some photos of the setup shortly. I believe it is utilizing the factory cats, I'll take a more in depth look here shortly.

Porsche Nut, is this referring to the actual Throttle Body that goes from the air box directly into the intake? Or, do you believe it's somewhere else? Any help or advice would be appreciated.

[Ahsai]

If the system is using the factory cats, the postcat O2 sensors should mount in the middle of the cat canisters. Most likely not affected by the aftermarket after cat components. You can plot the postcat O2 sensor voltage. It should stay at about 0.7v at steady crusing and idling. If it swings quickly between 0.2v to 0.7v, most likely your cats are gone, barring any exhaust leak.

[Loren]

The flap is in the air cleaner and controlled by vacuum and a solenoid for switching.

(click to enlarge)

(click to enlarge)

[Michael Spross]

Yep, definitely not stock. Here's a picture. Looks to be stock mufflers, from what I saw.

[Michael Spross]

Loren, thanks for that information. I have the X51 package, so the air box and intake is different. Is there any information regarding that? I'm assuming it's similar, but, thought i would ask.

[Ahsai]

Yep, definitely not stock. Here's a picture. Looks to be stock mufflers, from what I saw.

Looks very sweet :) Those are NOT the stock cats though. More like 200 cell sport cats. I think the extender on the postcat sensors should work though I've never tried it personally. The principle is creating a gas chamber around the sensor to smooth out the O2 content flutaution in the exhaust gas that it sees. You can use Durametric to verify the effect of the extender by taking before and after readings of the O2 sensor voltage. The DME wants to see a very steady postcat sensor reading around 0.7v.

[Michael Spross]

Thanks Ahsai. Got a conversation in with Fabspeed, here's what they said "Fabspeed crossover sport cats and headers with stock mufflers"

That's great information. I'm very new to using the Durametric tool. Still trying to figure out what the heck I'm looking at :)