Volkswagen New Beetle. Manual - part 1932

SAE P2xxx-DTCs 

Fuel and air ratios 

DIAGNOSTIC TROUBLE CODE P2101 TO P2138 

P1634

"Accelera. Pedal Pos. Sensor 2 

Signal too High"

P1639

"Accelera. Pedal Pos. Sensor 

1+2 Range/Performance"

P1640

"Internal Contr. Module 

(EEPROM) Error"

z

Replace Motronic Engine Control Module (ECM) -J220-, 

see REPLACING ENGINE CONTROL MODULE 

(ECM)

P1648

"Data Bus Powertrain defect"

z

Check terminal resistance for CAN-Bus, see 

TERMINAL RESISTANCE FOR CAN-BUS, 

CHECKING

P1649

"Data Bus Powertrain missing 

message from break ECU"

z

Check DTC memory of ABS control module: 

See ON BOARD DIAGNOSTIC (OBD )

P1673

Speed Signal error message 

from ABS ECU

SAE 
DTC

DTC text

Corrective action

P2101

Throttle Actuator Control Motor 

Circuit Range/Performance

z

Check Throttle Valve Control Module -J338-, see 

THROTTLE VALVE CONTROL MODULE, 

CHECKING

P2106 Throttle Actuator Control System 

- Forced Limited Power

P2122

Throttle/Pedal Position 

Sensor/Switch "D" Circuit Low 

Input

z

Check Throttle Position (TP) Sensor -G79- and Sender 

-2- for accelerator pedal position -G185-, see 

THROTTLE POSITION (TP) SENSOR, 

CHECKING

P2123

Throttle/Pedal Position 

Sensor/Switch "D" Circuit High 

Input

P2127

Throttle/Pedal Position 

Sensor/Switch "E" Circuit Low 

Input

P2128

Throttle/Pedal Position 

Sensor/Switch "E" Circuit High 

Input

P2133

Throttle/Pedal Position 

Sensor/Switch "F" Circuit High 

Input

P2138

Throttle/Pedal Position 

Sensor/Switch "D" / "E" Voltage 

Correlation

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE PERFORMANCE On-Board Diagnostic (OBD), 1.8L Generic Scan Tool - New Beetle

  

DIAGNOSTIC TROUBLE CODE P2181 & P2279

Additional exhaust regulation 

DIAGNOSTIC TROUBLE CODE P2400 TO P2404 

SAE P3xxx-DTCs 

Fuel and air mixture and additional emission regulations 

DIAGNOSTIC TROUBLE CODE P3081 

Fuel and air ratios 

DIAGNOSTIC TROUBLE CODE P3211 

SAE 
DTC

DTC text

Corrective action

P2181

Cooling System 

Performance

z

Check Engine Coolant Temperature (ECT) Sensor -G62-, see 

ENGINE COOLANT TEMPERATURE (ECT) SENSOR, 

CHECKING

z

Check coolant regulator: 

See COOLING SYSTEM COMPONENTS (ENGINE SIDE)

P2279

Intake Air System 

Leak

z

Check intake air system for leaks (false air), see INTAKE SYSTEM 

FOR LEAKS (FALSE AIR), CHECKING

SAE 
DTC

DTC text

Corrective action

P2400

Evaporative Emission System Leak 

Detection Pump Control Circuit/Open

z

Check Leak detection pump (LDP) -V144-, see 

CHECK LEAK DETECTION PUMP (LDP)

z

EVAP canister system, check for proper seal, 

see EVAP CANISTER SYSTEM, 

CHECKING FOR PROPER SEAL

P2401

Evaporative Emission System Leak 

Detection Pump Control Circuit Low

P2402

Evaporative Emission System Leak 

Detection Pump Control Circuit High

P2403

Evaporative Emission System Leak 

Detection Pump Sense Circuit/Open

P2404

Evaporative Emission System Leak 

Detection Pump Sense Circuit 

Range/Performance

SAE 
DTC

DTC text

Corrective action

P3081

Engine 

temperature to low

z

Let engine warm up 

z

Coolant temperature must be at least 50 C Diagnostic mode 1: 

Check measuring values; PID 5, Coolant temperature 

SAE 

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE PERFORMANCE On-Board Diagnostic (OBD), 1.8L Generic Scan Tool - New Beetle

  

DTC

DTC text

Corrective action

P3211

Exhaust-bank1-

sensor1, Heater 

return connection

z

Check oxygen sensor heater for oxygen sensors before Three Way 

Catalytic Converter (TWC), see OXYGEN SENSOR HEATER 

FOR OXYGEN SENSOR BEFORE THREE WAY 

CATALYTIC CONVERTER (TWC), CHECKING

z

Check Oxygen Sensor (O2S) and oxygen sensor control before Three 

Way Catalytic Converter (TWC), see CHECK OXYGEN SENSOR 

AND OXYGEN SENSOR REGULATION BEFORE 

CATALYTIC CONVERTER

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE PERFORMANCE On-Board Diagnostic (OBD), 1.8L Generic Scan Tool - New Beetle

  

1998-2004 ENGINE PERFORMANCE

Generic Scan Tool, 1.9L ALH & BEW- New Beetle 

GENERIC SCAN TOOL 

GENERAL INFORMATION FOR ON BOARD DIAGNOSTIC (OBD) 

Characteristics of On Board Diagnostic (OBD) 

The control module for Diesel-Direct fuel injection system is equipped with a DTC memory. 

If malfunctions occur at the emission relevant systems or components, they are stored in DTC memory with a 
description of the malfunction type. 

The control module for Diesel-Direct fuel injection system differentiates between different DTCs after 
evaluating the information. See DIAGNOSTIC TROUBLE CODE (DTC) TABLES: . 

The stored malfunctions can be checked with a standard diagnostic tester. See DIAGNOSTIC MODE 3: 
CHECK DTC MEMORY . 

When harness connectors are disconnected from the control module for Diesel-Direct fuel injection system or 
the battery is disconnected, all adaptation values in the control module are erased. DTC memory content will 
remain intact however. If the engine is started after this, rough, uneven idle can result. In this case, the readiness 
code must be generated again. See READINESS CODE, GENERATING . 

The following work steps must be performed in the described sequence after the malfunction(s) have been 
repaired: 

1. - Check DTC memory. See DIAGNOSTIC MODE 3: CHECK DTC MEMORY .  

2. - Erase DTC memory. See DIAGNOSTIC MODE 4: RESET/ERASE DIAGNOSTIC DATA .  

3. - For completion, generate readiness code. See READINESS CODE, GENERATING .  

On Board Diagnostic (OBD), technical data 

Control module identification 

The control module version is displayed by selecting "Diagnostic mode 9: Vehicle information" under address 
word 33. See DIAGNOSTIC MODE 9: VEHICLE INFORMATION . 

Equipment of control module for Diesel-Direct fuel injection system 

Equipment Of Control Module Identification 

Engine Code

ALH model year up to 

04.99

ALH Model year from 

05.99 and up

System identification

EDC (Electronic Diesel 

EDC (Electronic Diesel 

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE PERFORMANCE Generic Scan Tool, 1.9L ALH & BEW- New Beetle

  

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE PERFORMANCE Generic Scan Tool, 1.9L ALH & BEW- New Beetle