Diagnostic Trouble Code (DTC) Identification

NOTE: For component location, see SYSTEM/COMPONENT TESTS - 1.9L article. For circuit, connector terminal No. and wire color identification, see appropriate wiring diagram in appropriate WIRING DIAGRAMS article:

DIAGNOSTIC TROUBLE CODE IDENTIFICATION

SAE Code

VAG 1551 DTC

MIL DTC

System/Affected Circuit

Possible Cause/ ⁽¹⁾ Repair

.....

00310

1414

Catalyst Temp. Sensor 1

Open/Short Circuit To Ground

.....

00312

1422

Catalyst Temp. Sensor 2

Open/Short Circuit To Ground

.....

00313

1423

Catalytic Converter

Defective Catalytic Converter Or Metering Pump

P0321

00513

2111

Engine Speed Sensor-G28 Incorrect Signal

⁽²⁾

P0322

00513

2111

Engine Speed Sensor-G28 No Signal

Faulty Wiring Open Or Short Circuit

P1155

00519

2222

Manifold Absolute Pressure Sensor Short Circuit To B+

⁽³⁾

P1156

00519

2222

Manifold Absolute Pressure Sensor Open/Short Circuit To B+

Faulty, Wiring Has Open Circuit/Short To Ground

P1157

00519

2222

Manifold Absolute Pressure Sensor Voltage Supply

Wiring Open/Short Circuit

P0116

00522

2312

Engine Coolant Temp. Sensor Incorrect Signal

Faulty

P1255

00522

2312

Engine Coolant Temp. Sensor Short Circuit To Ground

Faulty Or Short Circuit To Ground Or Battery Voltage

P1256

00522

2312

Engine Coolant Temp. Sensor Open/Short Circuit to B+

Open/Short Circuit To Positive Or Battery Voltage

P1160

00527

2412

Intake Air Temperature Sensor Open/Short Circuit To Ground

Faulty Or Wire Short Circuit To Ground

P1161

00527

2412

Intake Air Temperature Sensor Open/Short Circuit To B+

Faulty/Wiring Open/Short Circuit To Positive

.....

00532

2234

System Voltage Incorrect Signal

Power Supply Relay/ECM Terminal No. 30 (B+)

P1162

00539

2311

Fuel Temp. Sensor

Open/Short Circuit To Ground

P1163

00539

2311

Fuel Temp. Sensor

Open/Short Circuit To Positive

P1245

00542

2211

Needle Lift Sensor Short To Ground

⁽⁴⁾

P1246

00542

2211

Needle Lift Sensor Incorrect Signal

⁽⁵⁾

P1247

00542

2211

Needle Lift Sensor Incorrect Signal

Faulty/Wiring Open/Short Circuit To Positive

.....

00545

.....

Engine/Trans. Electrical Connection Incorrect Signal

Wiring Open Or Short Circuit

P1248

00550

2244

Injection Start Control

⁽⁶⁾

P0101

00553

2324

Mass Airflow Sensor

Open/Short Circuit To Ground Or Battery Voltage

P1144

00553

2324

Mass Airflow Sensor

Open/Short Circuit To Ground Or Battery Voltage

P1145

00553

2324

Mass Airflow Sensor

Open/Short Circuit To Ground Or Battery Voltage

P1146

00553

2324

Mass Airflow Sensor

Open/Short Circuit To Ground Or Battery Voltage

P1403

00560

.....

EGR System Control Difference

Faulty EGR Valve Or Intake Air Leaks

P1550

00575

2221

Manifold Absolute Pressure Sensor

⁽⁷⁾

P0501

00625

.....

Vehicle Speed Signal

⁽⁸⁾

P1540

00625

.....

Vehicle Speed Signal

⁽⁸⁾

P1616

00626

.....

Glow Plug Indicator Light, Short Circuit To B+

Short Circuit To Positive

P1617

00626

.....

Glow Plug Indicator Light, Short Circuit To B+

Faulty/Short Circuit To Ground

.....

00668

.....

B+ Signal Too Low

Power Supply Relay/ECM Terminal No. 30 (B+)

.....

00671

.....

Cruise Control Switch

Open/Short Circuit To Battery Voltage Or Defective Switch

.....

00671

.....

Cruise Control Switch

Open/Short Circuit To Battery Voltage Or Defective Switch

.....

00671

.....

Cruise Control Switch

Open/Or Short Circuit To Battery Voltage Or Defective Switch

.....

00741

.....

Brake Pedal Position Monitor

⁽⁹⁾

P1693

00750

.....

Malfunction Indicator Lamp Short Circuit To B+

Short Circuit To Positive

P1694

00750

.....

Malfunction Indicator Lamp Short Circuit To Ground

Wiring Open Circuit, Bulb Faulty Or Short Circuit To Ground

P1354

00765

1412

Modulating Piston Displacement Sensor

⁽¹⁰⁾

P0121

00777

3131

Throttle Position Sensor

Faulty Or Incorrectly Set

P0123

00777

3131

Throttle Position Sensor

Faulty Or Short Circuit To Battery Voltage

P1632

00777

3131

Throttle Position Sensor

Wiring Open OR Short Circuit To Battery Voltage

P1612

01044

.....

Control Module Incorrectly Coded

Invalid ECM Coding

P0380

01050

.....

Glow Plug Monitoring

Glow Plug Relay Faulty, Glow Plug Faulty, Incorrect Glow Plugs Installed

.....

01177

.....

Generator Load Signal Terminal

Defective Generator Or Voltage Regulator

.....

01180

.....

Engine/AC Electrical Connection Short Circuit To B+

Wiring Short Circuit

.....

01193

.....

Low Heat Output-J359 Short Circuit to B+

Short Circuit To Positive

......

01194

.....

High Heat Output-J360 Short Circuit To B+

Short Circuit To Positive

.....

01208

.....

Data Record

Error In Data Record Or Data Record Altered

P1537

01237

4321

Fuel Cut-Off Valve Mechanical Malfunction

⁽¹¹⁾

P1538

01237

4321

Fuel Cut-Off Valve Open/Short Circuit To Ground

⁽¹¹⁾

.....

01242

4332

Final Stage In ECM

⁽¹²⁾

P1546

01262

.....

Wastegate Bypass Regulator Valve Short Circuit To B+

Short Circuit To Positive

P1549

01262

.....

Wastegate Bypass Regulator Valve Short Circuit To B+

Wiring Open Circuit, Faulty Or Short Circuit To Ground

P1401

01265

.....

EGR Vacuum Regulator Solenoid Valve Open/Short Circuit To Ground

Wiring Open Circuit/EGR Vacuum Regulator Solenoid Valve Faulty

P1402

01265

.....

EGR Vacuum Regulator Solenoid Valve Short Circuit To B+

Short Circuit To Positive

P1618

01266

.....

Glow Plug Relay Short Circuit To B+

Short Circuit To Positive

P1619

01266

.....

Glow Plug Relay Open/Short Circuit To Ground

⁽¹³⁾

P1561

01208

4312

Quantity Adjuster

⁽¹⁴⁾

P1562

01237

4312

Quantity Adjuster

⁽¹⁴⁾

P1563

01237

4312

Quantity Adjuster

⁽¹⁴⁾

P1251

01242 01269

.....

Injection-start Valve Short Circuit To B+

Short Circuit To Positive

P1252

01269

.....

Injection-start Valve Short Circuit To Ground

⁽¹⁵⁾

P0605

65535

1111

Electronic Control Module

Replace Faulty Electronic Control Module

⁽¹⁾	Check connectors, wiring circuit and component (if applicable). If connectors and wiring circuit check okay, substitute a known-good component and retest system. If component is okay, replace ECM.

⁽²⁾	Open or short circuit to ground or battery voltage, incorrect sensor, metal particles on sensor wheel or sensor not mounted tightly.

⁽³⁾	Open or short circuit to ground or battery voltage, defective wastegate by-pass regulator valve or ECM, hoses incorrectly routed or not connected.

⁽⁴⁾	Open or short circuit to ground or battery voltage in wiring to injector No. 3, fuel shortage or vapor lock.

⁽⁵⁾	Fuel supply was interrupted: Fuel Shortage, Cyl. 3 fuel injector line no OK, Filter blocked, Air in fuel system, Injection pump faulty, Open circuit in wiring to fuel cut-off valve, Engine speed sensor trigger faulty.

⁽⁶⁾	Defective cold start injector or needle lift sensor, vapor lock, fuel tank empty or fuel supply shortage.

⁽⁷⁾	Defective wastegate by-pass valve, hoses incorrectly routed or disconnected.

⁽⁸⁾	No signal from vehicle speed sensor or no signal from speedometer to ECM on vehicles equipped with electrical speedometer.

⁽⁹⁾	Defective brakelight switch, brake pedal switch or switch positions not synchronized.

⁽¹⁰⁾	Open or short circuit to ground or battery voltage, or defective injection pump.

⁽¹¹⁾	Short to battery voltage or defective, leaking or stuck fuel cut-off valve.

⁽¹²⁾	Open or short circuit to battery voltage, or defective metering pump or EGR valve.

⁽¹³⁾	Wiring open circuit, glow plug relay faulty or short circuit to ground.

⁽¹⁴⁾	Open or short circuit to ground or battery voltage, or defective injection pump.

⁽¹⁵⁾	Wiring open circuit, or cold start injector faulty, or short circuit to ground.