NHTSA ID Number: 10203510
Manufacturer Communication Number: QRSB AUDI
A6 S6
TSB/Document Date: 2021-11-15
Summary
Quick reference specification book.
P2017
Intake Manifold Runner
Position Sensor Circuit High
Position sensor signal
≥ 4750 mV
P202A
Reducing Agent Tank Heater
Control Circuit/Open
Conductance @ start of heating
≤ 0.10 1/Ohm
Audi A6/S6 Quick Reference Specification Book
•
September 2013
331
DTC Chart
DTC
DTC
Error Message
Malfunction Criteria and
Threshold Value
P202B
Reducing Agent Tank Heater
Control Circuit Low
Conductance @ start of heating
< 0.20 Ohm
P202C
Reducing Agent Tank Heater
Control Circuit High
Conductance @ start of heating
> 1 Ohm
P2020
Intake Manifold Runner
Position Sensor Circuit (Bank
2) Range/Performance
• Position sensor signal
< 3550 mV
• Position sensor signal
> 1450 mV
or
• Position sensor signal
> 550 mV and < 250 mV
or
• Position sensor signal
> 4450 mV and < 4750 mV
P2021
Intake Manifold Runner
Position Sensor Circuit (Bank
2) Low
Position sensor signal ≤ 250 mV
P2022
Intake Manifold Runner
Position Sensor Circuit (Bank
2) High
Position sensor signal
≥ 4750 mV
P203B
Reducing Agent Level Sensor
Circuit Range / Performance
• Signal voltage not equal full
level < 1.76 V or > 2.02 V
or
• Signal voltage not equal half
full level, 2.03 V or > 2.31 V
or
• Signal voltage not equal empty
level < 1.32 V or > 1.53 V
or
• Signal voltage not equal SCR
values < 0.25 V > 2.35 V
P203C
Reducing Agent Level Sensor
Circuit Open or Grounded
Signal Voltage < 0.1 V
P203D
Reducing Agent Level Sensor
Circuit Short to Battery
Voltage
Signal Voltage > 4.8 V
P2031
Exhaust Gas Temperature
Sensor 2 Circuit
Signal voltage > 2.61 V
P2032
Exhaust Gas Temperature
Sensor 2 Circuit Low
Signal voltage < 0.68 V
P204A
Reducing Agent Pressure
Sensor Circuit Open / Short
Ground
Signal voltage < 0.1 V
332
Audi A6/S6 Quick Reference Specification Book
•
September 2013
Error Message
Malfunction Criteria and
Threshold Value
P204B
Reducing Agent Pressure
Sensor Circuit Range /
Performance
Actual pressure reduction agent
delivery system > 50.00 kPa or
< 50.00 kPa
P204D
Reducing Agent Pressure
Sensor Circuit High
Signal voltage > 4.90 V
P2047
Reducing Agent Injection
Valve Circuit Open
Signal Voltage < 4.7 V
P2048
Reducing Agent Injection
Valve Circuit Grounded
• Signal Voltage < 2.97 V
or
• Signal Current > 1.6 A
P2049
Reducing Agent Injection
Valve Circuit Short to Battery
Voltage
• Signal Current > 1.8 A
or
• Analog measure < 200 mA
P205A
Reducing Agent Tank
Temperature Sensor Circuit
Short to Battery Voltage or
Open
Signal voltage > 4.63 V
P205B
Reducing Agent Tank
Temperature Sensor Circuit
Range/Performance
Case 1:
• AAT > 25 °C
• Difference between reducing
agent (AdBlue®) to ECT
< -30 °K
Case 2:
• AAT < 25 °C
• Difference between reducing
agent (AdBlue®) to ECT
< -30 °K
• Reducing agent temperature
increase while heating tank
< 1.5 K
• For time < 1500.0 s
P205C
Reducing Agent Tank
Temperature Sensor Circuit
Grounded
Signal voltage < 0.18 V
P207F
Reducing Agent Quality
Performance
Average efficiency > 2.50 [-]
P208A
Reducing Agent Pump Control
Circuit Open
Signal Voltage > 4.7 V
P208B
Reducing Agent Pump Does
Not Rotate At Expected
Speeds
• Rotation < 400 RPM
• > 5 Seconds
P208C
Reducing Agent Pump Control
Circuit Grounded
Signal Voltage < 2.74 V
Audi A6/S6 Quick Reference Specification Book
•
September 2013
333
DTC Chart
DTC
DTC
Error Message
P208D
Reducing Agent Pump Control
Circuit High
Signal Current > 4.0 A
P208E
Reducing Agent Injection
Valve Stuck Closed (Bank 1
Unit 1)
Missing number of signal peaks
> 200
P2080
Exhaust Gas Temperature
Sensor Circuit Range/
Performance
• Temperature difference to
temp EGR T3, T4, T5, T6
> 40 °K
or
• Mean value of modeled to
measured T4 > 100 °K
P2084
Exhaust Gas Temperature
Sensor 2 Circuit Range/
Performance
• Temperature difference to
temp EGR T3, T4, T5, T6 >
40 °K
or
• Mean value of modeled to
measured T3 > 100 °K
P20BB
Reducing Agent Tank Heater
Control Circuit Shorted to
Ground
Diagnostic signal from power
stage > 14A
P20BC
Reducing Agent Tank Heater
Control Circuit Shorted to
Battery Voltage
Diagnostic signal from power
stage > 1 A
P20BD
Reducing Agent Heater 2
Control Circuit/Open
Diagnostic signal from power
stage < 1 A
P20BF
Reducing Agent Heater 2
Control Circuit/Low
Diagnostic signal from power
stage < 14 A
P20B5
Reducing Agent Metering Unit
Heater Control Circuit/Open
Conductance during heating
≤ 0.10 1/Ohm
P20B7
Reducing Agent Metering Unit
Heater Control Circuit Low
Conductance @ start heating
< 0.30 1/Ohm
P20B8
Reducing Agent Metering Unit
Heater Control Circuit High
Conductance @ start heating
> 1.00 1/Ohm
P20B9
Reducing Agent Tank Heater
Control Circuit Open
Diagnostic signal from power
stage < 1A
P20C0
Reducing Agent Heater 2
Control Circuit High
Diagnostic signal from power
stage < 1 A
P20EE
SCR NOx Catalyst Efficiency
Below Threshold
Difference between calculated
and measured efficiency < 0.4[-]
334
Malfunction Criteria and
Threshold Value
Audi A6/S6 Quick Reference Specification Book
•
September 2013
Error Message
Malfunction Criteria and
Threshold Value
P20E8
Reducing Agent Pressure Too
Low / Functional check
• Actual pressure < 300.00 kPa
for 55 s
or
• Actual pressure < 350.00 kPa
for 60 s
or
• Pressure built up for 21.00[-]
Attempts > 450 kPa
P20FE
Reducing Agent Quality
Performance
Average Efficiency > 2.50 [-]
P20E9
Reducing Agent Pressure Too
High
• Actual pressure > 790.00 kPa
for 0.0 s
or
• Actual pressure > 650.00 kPa
for 10 s
or
• Pressure @ Dosing end
> 50 kPa
P20FF
Reducing Agent Metering
Internal fault
System Control Module -J880Detects Internal Hardware
Defects
P20F4
Reducing Agent Consumption
Too High
SCR adaptive value ≥ 2.50
P20F5
Reducing Agent Consumption
Too Low
SCR adaptive value ≤ 0.51
P21CA
Reducing Agent Metering
Sensor supply voltage < 1 V
System Control Module -J880Detects Short Circuit of Heater
Supply Voltage to B+
P21CC
Reducing Agent Metering
System Control Module
-J880- Detects Short Circuit
Of Heater Supply Voltage to
Ground
Sensor supply voltage > 7 V
P21C7
Reducing Agent Metering
System Control Module
-J880- Detects Short Circuit to
Ground on Main Relay
Supply voltage during activation
>7V
P21C9
Reducing Agent Metering
Supply voltage during activation
System Control Module -J880- < 1 V
Detects Short Circuit to B+ on
Main Relay
Audi A6/S6 Quick Reference Specification Book
•
September 2013
DTC Chart
DTC
335
DTC
Error Message
Malfunction Criteria and
Threshold Value
P2100
Throttle Actuator Control
Motor Circuit/Open
Signal from power stage
> 3.26 V and < 5.40 V
P2101
Throttle Actuator Control
Motor Circuit Range/
Performance
Signal = no change
P2102
Throttle Actuator Control
Motor Circuit Low
Signal from power stage
≤ 3.26 V
P2103
Throttle Actuator Control
Motor Circuit High
Signal from power stage
> 1.50 V and > 50 mA
P2122
Pedal Position Sensor D
Circuit Low Input
Signal voltage < 0.646 V
P2123
Pedal Position Sensor D
Circuit High Input
Signal voltage > 4.889 V
P2127
Pedal Position Sensor E
Circuit Low Input
Signal voltage < 0.276 V
P2128
Pedal Position Sensor E
Circuit High Input
Signal voltage > 2.644 V
- 💯【Conta.ct us for Support Directly】If you met any...
- 🔥🔥🔥【2026 AUTEL FLAGSHIP MK900BT MK900-BT, NEW...
- 🚗【3000+ ACTIVE TESTS (50➡3000+), SAME AS MS...
- 🚗【40+ HOT SERVICES FOR 150 MAKES (28+➡40+)】Full...
- 🚗【OE ALL SYSTEM DIAGNOSE, AUTO SCAN 2.0: SCAN LICENSE...
- 【TURN OFF CEL】 This AL319 car scanner diagnostic tool...
- 【EXTENSIVE APPLICATION】 Autel AL319 Compatible with...
- 【FOR END USER & DIYERS】 This error code reader AL319 is...
- 【USER-FRIENDLY DESIGN】 This OBD2 scanner and check...
- 【HIGH-QUALITY SERVICES】 12 months war.ranty from the...
If the PDF is very large, it may not load in the preview below.
Some older TSBs had multiple PDFs — visit the NHTSA Website to view all PDFs.
If the TSB PDF does not show, download or view it on the NHTSA Website.
Click on the (+) Plus Sign
Then Click on Associated Document(s)
Search NHTSA Database for Recalls
Search NHTSA Database for Vehicle Investigations
View Latest Vehicle Investigations
Search NHTSA Database for Vehicle Complaints
View Latest Vehicle Complaints
TSB/Document ID: QRSB AUDI A6 S6
Replacement Service Bulletin Number:
MFR Communication Date: 2013-09-01
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
- [Notice] When you receive a used device, it may be a customer return resold by Amazon without inspection. You can exchange it for a new one through Amazon. As this situation is unavoidable, we sincerely apologize. For any issues, contacting us via Amazon's "Messages" is the best way. THINKSCAN 689BT Bidirectional Scan Tool Can Be Used Immediately After It is Turned On, Without Complicated Registration Process, Which is More Convenient & Quick.
- Full Bi-Directional Control & 3000+ Active Tests: Take control and test components like actuators, fuel injectors, relays, and cooling fans in real time. You’ll quickly see if the problem is in the part itself or the control module — saving you hours of guesswork and frustrating trial-and-error.
- Advanced ECU Coding Capabilities: Handle module matching and hidden feature activation with confidence. When you replace an ECU or want to customize settings, this obd2 scanner diagnostic bi directional tool gives you the professional-level capabilities you need without the dealership price tag.
- 34+ Useful Reset and Maintenance Functions: Complete everyday service tasks smoothly with a wide range of helpful reset and maintenance functions. Whether you’re keeping up with regular upkeep or tackling a specific job, this scanner makes maintenance simpler and less stressful for both DIYers and pros.
- Comprehensive Full System Diagnostics: Diagnose every major system — Engine, Transmission, ABS, SRS, TPMS, and more — all in one place. Finally stop wondering if you’re missing something important; get the full picture and clear codes with ease.
- Top Reasons to Choose the D7S OBD2 Scanner: XTOOL D7S car scan tool, an upgrade of XTOOL D7, offers comprehensive features for automotive technicians, workshops, and DIY enthusiasts 1. Upgraded Hardware: 2+64GB memory, rear camera, intuitive interface, foldable bracket 2. Complete Diagnostics: FCA
Autoauth, OE-level all system scan, 39+ maintenance services, 4K+ bidirectional, CANFD/DoIP protocol 3. Advanced Capabilities: ECU c0ding, PMI functions 4. Wide Compatibility: Support 10,000+ models, covering 99% vehicle brands 5. Multi-language: Available in 22+ languages, No IP Restrictions 6. 3-Year Updates: Save 300 bucks on software updates for the latest features and optimizations - 2026 Upgraded D7S Car Scanner Features: The newly 2026 D7S V2.0 scanner for car brings exciting features for advanced vehicle diagnostics and enhanced user experience 1. FCA AutoAuth: Now supports FCA SGW module for Chrysler, for Jeep, for Dodge (2018+), for Fiat (2017+), enabling faster vehicle communication without gateway restrictions 2. PMI (Offline ECU Pr0gramming): Allows for Ford, for Lincoln, and for Mazda ECU pr0gramming for new modules 3. Optimized Diagnostic Report 2.0: Personalized reports with logos and customer info for auto shops. Note: Compatibility varies by cars, please check before order
- 39+ Services/Resets/Adaptations/Relearns/Calibrations: XTOOL D7S full system car scanner diagnostic tool tackles 99% of common car issues through its 36+ special functions, including Oil Reset, EPB, SAS, BMS, Throttle Reset, Injector C0ding, ABS Bleed, TPMS Reset, Power Balance, etc and also covers specific-vehicle functions like Crank Sensor Relearn, ABS Initialization, Cylinder Power Balance, Fuel Trim Reset, Idle Relearn etc. This car diagnostic scanner enhances efficiency, making repairs and maintenance hassle-free. Tip: DO NOT for All vehicles, please check compatibility first
- Cost-effective ECU C0ding Scan Tool for Specific Brands: Enhance your vehicle's performance with XTOOL D7S! This obd2 scanner all systems bidirectional offers advanced capabilities at an affordable price, supports online for BMW, for Benz and offline for BENZ, for MIT, along with PMI functions for Ford, for Mazda, and for Lincoln. Ideal for technicians and DIY enthusiasts, this automotive scanner diagnostic tool optimizes vehicle performance and enhances the driving experience. Note: Not for all cars and modules, please send car VIN to check the compatibility before purchase
- OE All System Diagnostic & 8 Pids Graphing: XTOOL D7S is a comprehensive all system bi directional obd2 scanner that delivers dealer-level diagnostics, completely controlling over your vehicle’s performance and health. This automotive scan tool can read and clear DTCs, view live data and ECU information, retrieve freeze frames, and perform active tests and full obd2 functions. This bi-directional scan tool can can identify your vehicle's make, model, and year information with just one click and show up to 8 PIDs live data with options for CSV viewing, playback, and recording for in-depth analysis. It is easy-to-use for both professionals and beginners, helping pinpoint issues efficiently
- 【✅Compared to BOSSCOMM IF742, IF745 Offers Full-System Diagnostics】The BOSSCOMM IF745 car diagnostic scanner is an upgraded model of IF742. In addition to supporting all OBD2 Code Reader functions and 6 reset options (ABS/EPB/SAS/BMS/Oil/Throttle), it expands diagnostics from 4 systems (Check Engine/ABS/SRS/Transmission) to vehicle All systems, including Steering, Suspension, and Body Electronics. This provides deeper, more comprehensive diagnostic capabilities.
- 【✨10 OBD2 Functions】The BOSSCOMM IF745 scan tool’s DTC Lookup instantly translates fault codes into user-friendly explanations, its I/M Readiness feature streamlines emissions testing with a single tap, and Freeze Frame lets you pinpoint the exact moment of a fault for in-depth root-cause diagnosis. Combined with a live data dashboard and advanced diagnostics (O2S, OBMon, EVAP), it delivers comprehensive insights for confident troubleshooting.
- 【✨Deep Diagnostics for All Vehicle System Modules】Beyond code reading/clearing and ECU information retrieval, our all-in-one data stream feature lets you inspect all current fault codes and their locations across the vehicle’s systems. This vehicle code reader helps you turn off dashboard warning lights and perform a comprehensive self-check of your car at home—no more back-and-forth trips to the repair shop or hefty inspection fees.
- 【✨6 Essential Resets: ABS Bleeding, Oil, EPB, SAS, Throttle, BMS】The BOSSCOMM IF745 obd2 scanner diagnostic tool swiftly purges air from brake lines to restore braking sensitivity, fine-tunes maintenance cycles to eliminate false alerts, resolves parking brake issues with one-click control, recalibrates steering sensors for stability, optimizes engine idling/acceleration for smoother performance, and deeply resets battery systems to extend lifespan and range via precise parameter adjustments.❗NOTE: Does NOT support bidirectional control, coding, or programming.
- 【✨10,000+ Car Models, AutoVIN, 13 Languages】The BOSSCOMM IF745 vehicle scanner diagnostic tool covers 73+ global car brands and offers support in 13 languages, making it perfect for DIYers, auto mechanics, or as a thoughtful gift. With a single-click AutoVIN feature, it instantly retrieves vehicle serial numbers, streamlining diagnostics for users globally. This adaptable tool balances user-friendliness with precision, catering to both personal and professional requirements.✅Unsure about compatibility? Compatibility will vary on vehicles' model and year, pls reach us via 📧 [email protected] 📧 before purchase.
This product presentation was made with AAWP plugin.