2014 PASSAT Service Bulletin/Repair Instructions

P202C
Reducing Agent Tank Heater

Circuit Open or Short to

Battery Voltage
Max. power at engagement >

0.85 S
P2031
Exhaust Gas Temperature

Sensor 3 Circuit Open or

Short to Battery Voltage
Sensor 2 voltage > 1.72 V
P2032
Exhaust Gas Temperature

Sensor 3 Circuit Short to

Ground
Sensor 2 voltage < 0.45 V
P203A
Reducing Agent Reservoir

Level Sensor Circuit Range

Check
• Level signal < 25% PWM or

> 85% PWM

• Interval between Monitoring

pulses < 80 Sec
P203B
Reducing Agent Reservoir

Level Sensor Circuit

Rationality Check
• PWM signal < 34%
Monitoring of Electrical Status
• PWM signal = 34 - 44%
P2047
Reducing Agent Injection

Valve Circuit Open
Signal Voltage > 2.99 V
P2048
Reducing Agent Injection

Valve Circuit Short to Ground
• Signal Voltage < 2.04 V

• Signal Current > 1600 mA
P2049
Reducing Agent Injection

Valve Circuit Short to Battery

Voltage
• Signal Voltage > 0.25 V

• Signal Current < 200 mA
P204A
Reducing Agent Metering

Pressure Sensor Circuit

Short to Ground
Signal voltage < 0.38 V
40
VW Passat Quick Reference Specification Book
•
February 2014
Error Message
Malfunction Criteria and

Threshold Value
P204B
Reducing Agent Metering

Pressure Sensor Circuit

Range/Performance
Sensor Pressure >500 hPa
P204D
Reducing Agent Metering

Pressure Sensor Circuit

Short to Battery voltage
Signal voltage > 4.72 V
P204F
Reducing Agent System

Performance
Adaptation value (ratio) over

threshold > 2 [-]
P205A
Reducing Agent Tank

Temperature Sensor Circuit

Open or Short to Battery

Voltage
Signal voltage > 3.12 V
P205B
Reducing Agent Tank

Temperature Sensor Circuit

Range / Performance
Absolute value of temperature

difference to ECT > 30 K and/or

< -52 Kelvin
P205C
Reducing Agent Tank

Temperature Sensor Circuit

Short to Ground
Signal voltage < 0.16 V
P2080
Exhaust Gas Temperature

Sensor 1 Circuit Plausibility

Check
• Sensor temperature < 85° C

• Temperature difference to

other temperature sensors

during cold start > 40 K
P2084
Exhaust Gas Temperature

Sensor 2 Circuit

Plausibility Check
• Sensor temperature < 85° C

• Temperature difference to

other temperature sensors

during cold start > 40 K
P208A
Reducing Agent Pump Control

Circuit Open
Signal voltage > 2.99 V
P208B
Reducing Agent Pump Control

Circuit Monitoring Engine

Speed
Engine speed > 300 RPM
P208C
Reducing Agent Pump Control

Circuit Short to Ground
Signal voltage < 2.04 V
P208D
Reducing Agent Pump Control

Circuit Short to Battery

Voltage
Signal Current > 6.0 A
VW Passat Quick Reference Specification Book
•
February 2014
41
DTC Chart
DTC
DTC
Error Message
Malfunction Criteria and

Threshold Value
P208E
Reductant Injection Valve

Stuck Closed
• Number of consecutive failed

attempts to open valve > 40 [-]

• Number of consecutive

successful attempts to open

valve < 10 [-] (during initial

test activation of the valve

before the urea pressure has

been built up)
P20A0
Reducing Agent Reversing

Valve Circuit Open
Diagnostic signal from power

stage > 2.99 V
P20A2
Reducing Agent Purge Control Diagnostic signal from power

Valve Circuit Short to Ground

stage < 2.04 V
P20A3
Reducing Agent Purge Control Diagnostic signal from power

Valve Circuit Short to Battery

stage > 2.2 A

Voltage
P20A5
Reducing Agent Purge Control Pressure drop after switching

Valve Stuck Closed

valve < 3000 hPa
P20B5
Reducing Agent Pump Heater

Control Circuit Open
Current during heating < 2 A
P20B7
Reducing Agent Metering Unit

Heater Control Circuit Low
Max. power at engagement

 0.89 Sec.
P20B9
Reducing Agent Tank Heater

Circuit Open
Signal Voltage > 4.5 V
P20BB
Reducing Agent Tank Heater

Circuit Short to Ground
Signal Voltage < 2.97 V
P20BC
Reducing Agent Tank Heater

Circuit Out of Range High
Signal Current > 2.2 A
P20BD
Reducing Agent Line Heater

Circuit Open
Signal Voltage > 4.5 V
P20BF
Reducing Agent Line Heater

Circuit Short to Ground
Signal Voltage < 2.97 V
P20C0
Reducing Agent Line Heater

Circuit Out of Range High
Signal current > 2.2 A
P20E8
Reducing Agent Metering

Pressure Sensor Too Low
Urea system pressure

< 3750 hPa
P20E9
Reducing Agent Metering

Pressure Sensor Too High
Urea system pressure > 6500

hPa
42
VW Passat Quick Reference Specification Book
•
February 2014
DTC
Error Message
Malfunction Criteria and

Threshold Value
CR NOx Catalyst Conversion

Efficiency
Difference between simulated

efficiency of a non defective

system under the current

operating conditions and the

measured actual efficiency

> 40%
P2100
Throttle Actuator Control

Motor Circuit Open
Signal Voltage < 4.7 V
P2101
Throttle Valve Actuator

Control Motor Circuit Internal

Electrical Error
Signal Current > 3.0 A
P2102
Throttle Valve Actuator Control Signal Voltage < 2.97 V

Motor Circuit Short to Ground
P2103
Throttle Valve Actuator Control Signal Current > 3.0 A

Motor Circuit Short to Battery

Voltage
P2111
Throttle Valve Actuator Control Valve stuck open > 12%

Motor Circuit Stuck Open
P2112
Throttle Valve Actuator Control Valve stuck open < 12 %

Motor Circuit Stuck Closed
P2122
Accelerator Pedal Position

Sensor Circuit Short to

Ground
Signal voltage < 0.61 V
P2123
Accelerator Pedal Position

Sensor Circuit Open or Short

to Battery Voltage
Sensor 1 voltage > 4.79 V
P2127
Accelerator Pedal Position

Sensor 2 Circuit Short to

Ground
Signal voltage > 0.27 V
P2128
Accelerator Pedal Position

Sensor 2 Circuit Open or

Short to Battery Voltage
Signal voltage > 2.43 V
P2138
Accelerator Position Sensor

1 and 2 Circuit Rationality

Check
Difference between app sensor

1 voltage and app sensor 2

voltage) V (tolerance 13% 20%)
P2146
Fuel Injector Group “A” Supply Diagnostic signal in power

Voltage Circuit Shorted

stage = Failed

Internally
P2149
Fuel Injector Group “B” Supply Diagnostic signal in power

Voltage Circuit Shorted

stage = Failed

Internally
VW Passat Quick Reference Specification Book
•
February 2014
DTC Chart
P20EE
43
DTC

P2183
Error Message
Malfunction Criteria and

Threshold Value
Engine Coolant Temperature

Sensor On Radiator Circuit

Range / Performance
• Temperature difference to

at least 3 other temperature

sensors at startup > 30° K
Cross Check of Temperature

Sensors (engine part) at Cold

Start Conditions
• Temperature difference to

at least 3 other temperature

sensors during cold start

> 20 K
P2184
Engine Coolant Temperature

Sensor On Radiator Outlet

Circuit Short to Ground
Signal Voltage < 0.15 V
P2185
Engine Coolant Temperature

Sensor On Radiator Outlet

Circuit Open or Short to

Battery Voltage
Signal Voltage > 3.25 V
P2195
HO2 Sensor Signal Plausibility Deviation to oxygen

Check Stuck Lean

concentration (while fuel cutoff)

> 4,6 % vol/vol
P2196
HO2 Sensor Signal Plausibility Deviation to oxygen

Check Stuck Rich

concentration (while fuel cutoff)

< -6,3 % vol/vol
P2200
NOx Sensor Circuit Internal

Continuity Checking /

Monitoring
NOx sensor signal ratio of

validity ≥ 0.50 [-]
P2201
NOx Sensor Circuit Range /

Performance
• Average NOx offset during fuel

cutoff < -30 ppm or > 50 ppm
Monitoring of NOx Sensor

Circuit Undershoot During

Fuel Cut Off
• NOx signal < -40 ppm
P2202
NOx Sensor Circuit Range

Check Low
NOx sensor reading < -105

ppm
P2203
NOx Sensor Bank 1 Sensor 1

Circuit High
NOx sensor reading > 1655

ppm
P2209
NOx Sensor Heater Circuit

Range / Performance
NOx control not active for

> 180 s
P220A
NOx Sensor Circuit Supply

Voltage Error
Difference between battery and

sensor supply voltage > 1.5 V

and/or < -16V
P2237
HO2 Sensor Control Circuit

Dynamic Check pump current

(IP)
Pump current (IP) < 0.005 [-]
44
VW Passat Quick Reference Specification Book
•
February 2014
DTC
Error Message
Malfunction Criteria and

Threshold Value
HO2 Sensor Control Circuit

Dynamic Check Nernst

Voltage (UN)

1...7 8910 11...18

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Last update on 2026-05-11 / Affiliate links / Images from Amazon Product Advertising API

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