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DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSAUDI1998A4 AVANT QUATTRO, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 1 (ENGINE CONTROLS - TESTS W/CODES - TESTS (1.8L TURBO))DIAGNOSTIC TROUBLE CODE IDENTIFICATIONNOTES

1998 Audi A4 Avant Quattro, Automatic

Diagnostic Trouble Code Identification: Notes

1998 Audi A4 Avant Quattro, AutomaticSECTION Notes

WARNING: This page is about a different variant/trim than selected.

NOTE: Vehicle manufacturer does not support diagnostic information using aftermarket scan tools. Limited diagnostic information is available.

DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION

Generic Scan Tool Code

VAG 1551 Code

Malfunction/Affected Sensor Or Circuit

P0102 ⁽¹⁾

⁽¹⁾ 16486

MAF Circuit Low Input

P0103 ⁽¹⁾

⁽¹⁾ 16487

MAF Circuit High Input

P0107 ⁽¹⁾

⁽¹⁾ 16491

MAP Or Barometric Pressure Low Input

P0108 ⁽¹⁾

⁽¹⁾ 16491

MAP Or Barometric Pressure High Input

P0112 ⁽¹⁾

⁽¹⁾ 16496

Intake Air Temp Circuit Low Input

P0113 ⁽¹⁾

⁽¹⁾ 16497

Intake Air Temp Circuit High Input

P0116 ⁽¹⁾

⁽¹⁾ 16500

ECT Circuit Range/Performance Problem

P0117 ⁽¹⁾

⁽¹⁾ 16501

ECT Circuit Low Input

P0118 ⁽¹⁾

⁽¹⁾ 16502

ECT Circuit High Input

P0121 ⁽¹⁾

⁽¹⁾ 16505

TP Sensor Circuit Range/Performance Problem

P0122 ⁽¹⁾

⁽¹⁾ 16506

TP Sensor Circuit Low Input

P0123 ⁽¹⁾

⁽¹⁾ 16507

TP Sensor Circuit High Input

P0130 ⁽¹⁾

⁽¹⁾ 16514

HO2S Circuit Malfunction (Bank 1, Sensor 1)

P0131 ⁽¹⁾

⁽¹⁾ 16515

HO2S Circuit Low Voltage (Bank 1, Sensor 1)

P0132 ⁽¹⁾

⁽¹⁾ 16516

HO2S Circuit High Voltage (Bank 1, Sensor 1)

P0133 ⁽²⁾

⁽²⁾ 16517

HO2S Circuit Slow Response (Bank 1, Sensor 1)

P0134 ⁽¹⁾

⁽¹⁾ 16518

HO2S Circuit No Activity Detected (Bank 1, Sensor 1)

P0136 ⁽¹⁾

⁽¹⁾ 16520

HO2S Circuit Malfunction (Bank 1, Sensor 2)

P0137 ⁽¹⁾

⁽¹⁾ 16521

HO2S Circuit Low Voltage (Bank 1, Sensor 2)

P0138 ⁽¹⁾

⁽¹⁾ 16522

HO2S Circuit High Voltage (Bank 1, Sensor 2)

P0140 ⁽¹⁾

⁽¹⁾ 16524

HO2S Circuit No Activity Detected (Bank 1, Sensor 2)

P0300 ⁽²⁾

⁽²⁾ 16684

Random/Multiple Cylinder Misfire Detected

P0301 ⁽²⁾

⁽²⁾ 16685

Cylinder No. 1 Misfire Detected

P0302 ⁽²⁾

⁽²⁾ 16686

Cylinder No. 2 Misfire Detected

P0303 ⁽²⁾

⁽²⁾ 16687

Cylinder No. 3 Misfire Detected

P0304 ⁽²⁾

⁽²⁾ 16688

Cylinder No. 4 Misfire Detected

P0321 ⁽¹⁾

⁽¹⁾ 16705

Ignition/Distributor Engine Speed Input Circuit Range/Performance

P0322 ⁽³⁾

⁽³⁾ 16706

Ignition/Distributor Engine Speed Input Circuit No Signal

P0327 ⁽³⁾

⁽³⁾ 16711

Knock Sensor No. 1 Circuit Low Input

P0332 ⁽³⁾

⁽³⁾ 16716

Knock Sensor No. 2 Circuit Low Input

P0422 ⁽¹⁾

⁽¹⁾ 16806

Main Catalyst Efficiency Below Threshold (Bank 1)

P0441 ⁽¹⁾

⁽¹⁾ 16825

EVAP System Incorrect Purge Flow

P0442 ⁽⁵⁾

⁽⁵⁾ 16826

EVAP System Small Leak Detected

P0455 ⁽⁵⁾

⁽⁵⁾ 16839

EVAP System Gross Leak Detected

P0501 ⁽¹⁾

⁽¹⁾ 16885

Vehicle Speed Sensor Range/Performance

P0506 ⁽¹⁾

⁽¹⁾ 16890

Idle Control System RPM Lower Than Expected

P0507 ⁽¹⁾

⁽¹⁾ 16891

Idle Control System RPM Higher Than Expected

P0560 ⁽¹⁾

⁽¹⁾ 16944

System Voltage Malfunction

P0562 ⁽¹⁾

⁽¹⁾ 16946

System Voltage Low

P0563 ⁽¹⁾

⁽¹⁾ 16947

System Voltage High

P0601 ⁽¹⁾

⁽¹⁾ 16895

PCM Memory Check Sum Error

P0604 ⁽¹⁾

⁽¹⁾ 16988

PCM Random Access Memory (RAM) Error

P0707 ⁽⁴⁾

⁽⁴⁾ 17091

Transmission Range Sensor Circuit Low Input

P0708 ⁽⁴⁾

⁽⁴⁾ 17092

Transmission Range Sensor Circuit High Input

P1102 ⁽¹⁾

⁽¹⁾ 17510

HO2S Heater Circuit Short to B+ (Bank 1, Sensor 1)

P1105 ⁽¹⁾

⁽¹⁾ 17513

HO2S Heater Circuit Short to B+ (Bank 1, Sensor 2)

P1127 ⁽¹⁾

⁽¹⁾ 17535

Long Term Fuel Trim (Multiplicative) Too Rich (Bank 1)

P1128 ⁽¹⁾

⁽¹⁾ 17536

Long Term Fuel Trim (Multiplicative) Too Lean (Bank 1)

P1136 ⁽¹⁾

⁽¹⁾ 17544

Long Term Fuel Trim (Additive) Too Lean (Bank 1)

P1137 ⁽¹⁾

⁽¹⁾ 17545

Long Term Fuel Trim (Additive) Too Rich (Bank 1)

P1176 ⁽¹⁾

⁽¹⁾ 17584

HO2S Correction Behind Catalyst Limit Attained (Bank 1)

P1196 ⁽¹⁾

⁽¹⁾ 17604

HO2S Heater Electrical Malfunction (Bank 1, Sensor 1)

P1198 ⁽¹⁾

⁽¹⁾ 17606

HO2S Heater Electrical Malfunction (Bank 1, Sensor 2)

P1213 ⁽³⁾

⁽³⁾ 17621

Cylinder No. 1 Fuel Injector Circuit Short To B+

P1214 ⁽³⁾

⁽³⁾ 17622

Cylinder No. 2 Fuel Injector Circuit Short To B+

P1215 ⁽³⁾

⁽³⁾ 17623

Cylinder No. 3 Fuel Injector Circuit Short To B+

P1216 ⁽³⁾

⁽³⁾ 17624

Cylinder No. 4 Fuel Injector Circuit Short To B+

P1225

⁽³⁾ 17633

Cylinder No. 1 Fuel Injector Circuit Short To Ground

P1226 ⁽³⁾

⁽³⁾ 17634

Cylinder No. 2 Fuel Injector Circuit Short To Ground

P1227 ⁽³⁾

⁽³⁾ 17635

Cylinder No. 3 Fuel Injector Circuit Short To Ground

P1228 ⁽³⁾

⁽³⁾ 17636

Cylinder No. 4 Fuel Injector Circuit Short To Ground

P1237 ⁽³⁾

⁽³⁾ 17645

Cylinder No. 1 Fuel Injector Open Circuit

P1238 ⁽³⁾

⁽³⁾ 17646

Cylinder No. 2 Fuel Injector Open Circuit

P1239 ⁽³⁾

⁽³⁾ 17647

Cylinder No. 3 Fuel Injector Open Circuit

P1240 ⁽³⁾

⁽³⁾ 17648

Cylinder No. 4 Fuel Injector Open Circuit

P1250 ⁽⁴⁾

⁽⁴⁾ 17658

Fuel Level Too Low

P1325 ⁽⁴⁾

⁽⁴⁾ 17733

Cylinder No. 1 Knock Control Limit Attained

P1326 ⁽⁴⁾

⁽⁴⁾ 17734

Cylinder No. 2 Knock Control Limit Attained

P1327 ⁽⁴⁾

⁽⁴⁾ 17735

Cylinder No. 3 Knock Control Limit Attained

P1328 ⁽⁴⁾

⁽⁴⁾ 17736

Cylinder No. 4 Knock Control Limit Attained

P1337 ⁽¹⁾

⁽¹⁾ 17745

Camshaft Position Sensor Short To Ground (Bank 1)

P1338 ⁽¹⁾

⁽¹⁾ 17746

Camshaft Position Sensor Open Circuit Or Short To B+ (Bank 1)

P1386 ⁽⁴⁾

⁽⁴⁾ 17794

PCM Knock Control Circuit Error

P1410 ⁽¹⁾

⁽¹⁾ 17818

Fuel Tank Ventilation Valve Circuit Short To B+

P1425 ⁽¹⁾

⁽¹⁾ 17833

Fuel Tank Ventilation Valve Short To Ground

P1426 ⁽¹⁾

⁽¹⁾ 17834

Fuel Tank Ventilation Valve Open

P1471 ⁽⁵⁾

⁽⁵⁾ 17879

EVAP Leak Detection Pump Short To B+

P1472 ⁽⁵⁾

⁽⁵⁾ 17880

EVAP Leak Detection Pump Short To Ground

P1473 ⁽⁵⁾

⁽⁵⁾ 17881

EVAP Leak Detection Pump Open Circuit

P1475 ⁽⁵⁾

⁽⁵⁾ 17883

EVAP Leak Detection Pump Malfunction/Signal Circuit Open

P1476 ⁽⁵⁾

⁽⁵⁾ 17884

EVAP Leak Detection Pump Malfunction/Insufficient Vacuum

P1477 ⁽⁵⁾

⁽⁵⁾ 17885

EVAP Leak Detection Pump Malfunction

P1500 ⁽³⁾

⁽³⁾ 17908

Fuel Pump Relay Circuit Electrical Malfunction

P1501 ⁽³⁾

⁽³⁾ 17909

Fuel Pump Relay Circuit Short To Ground

P1502 ⁽³⁾

⁽³⁾ 17910

Fuel Pump Relay Circuit Short To B+

P1505 ⁽¹⁾

⁽¹⁾ 17913

CTP Switch Does Not Close (Open Circuit)

P1506 ⁽¹⁾

⁽¹⁾ 17914

CTP Switch Does Not Open (Short To Ground)

P1543 ⁽³⁾

⁽³⁾ 17951

Throttle Actuation Potentiometer Signal Too Low

P1544 ⁽³⁾

⁽³⁾ 17952

Throttle Actuation Potentiometer Signal Too High

P1545 ⁽¹⁾

⁽¹⁾ 17953

Throttle Position Control Malfunction

P1546 ⁽⁴⁾

⁽⁴⁾ 17954

Boost Pressure Control Valve Short To B+

P1547 ⁽⁴⁾

⁽⁴⁾ 17955

Boost Pressure Control Valve Short To Ground

P1548 ⁽⁴⁾

⁽⁴⁾ 17956

Boost Pressure Control Valve Open

P1555 ⁽⁴⁾

⁽⁴⁾ 17963

Charge Pressure Upper Limit Exceeded

P1556 ⁽⁴⁾

⁽⁴⁾ 17964

Charge Pressure Negative Deviation

P1557 ⁽⁴⁾

⁽⁴⁾ 17965

Charge Pressure Positive Deviation

P1558 ⁽¹⁾

⁽¹⁾ 17966

Throttle Actuator Electrical Malfunction

P1559 ⁽⁴⁾

⁽⁴⁾ 17967

Idle Speed Control/Throttle Position Adaptation Malfunction

P1560 ⁽⁴⁾

⁽⁴⁾ 17968

Maximum Engine Speed Exceeded

P1564 ⁽⁴⁾

⁽⁴⁾ 17972

Idle Speed Contr./Throttle Pos. Low Voltage During Adaptation

P1565 ⁽¹⁾

⁽¹⁾ 17973

Throttle Valve Control Module, Lower Stop Not Attained

P1602 ⁽⁴⁾

⁽⁴⁾ 18010

Power Supply (B+) Terminal 30 Low Voltage

P1606 ⁽⁴⁾

⁽⁴⁾ 18014

Rough Road Specification Engine Torque ABS-ECU Electrical Malfunction

P1611 ⁽¹⁾

⁽¹⁾ 18019

MIL Call-Up Circuit/TCM Short To Ground

P1612 ⁽⁴⁾

⁽⁴⁾ 18020

PCM Incorrect Coding

P1613 ⁽¹⁾

⁽¹⁾ 18021

MIL Call-Up Circuit Open Or Short To B+

P1624 ⁽³⁾

⁽³⁾ 18032

MIL Request Active

P1640 ⁽¹⁾

⁽¹⁾ 18048

Internal PCM (EEPROM) Error

P1681 ⁽³⁾

⁽³⁾ 18089

PCM PROGRAMMING NOT FINISHED

⁽¹⁾	MIL is switched on after 2 trips.

⁽²⁾	MIL is switched on after 2 trips or will blink.

⁽³⁾	MIL is switched on immediately.

⁽⁴⁾	MIL is not switched on.

⁽⁵⁾	MIL display will vary depending on vehicle production date. Model year 1996-97, MIL is not switched on. Model year 1998, MIL is switched on after 2 trips.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.