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One of the most time consuming tasks with diagnosing an engine problem is identifying the broken, faulty or failing car part on your 2004 Audi TT to begin the repair process. Diagnosing problems with automotive components in 2004 Audi TT vehicles are becoming increasing more complicated due to advancing automotive technologies and electronics.

Whether your an 2004 Audi TT master mechanic, a 2004 Audi TT fan or a novice 2004 Audi TT enthusiast, having an OBD2 diagnostic code reader, OBDII trouble code reader or ODB2 trouble code scanner and a list of check engine codes or auto trouble codes can save yourself a lot of time. Pinpointing a specific car part problem is as easy as pressing a couple of buttons on your automotive scanner.

The Modified Life staff has taken all its 2004 Audi TT check engine codes, 2004 Audi TT diagnostic codes and 2004 Audi TT trouble codes and cataloged them online for use by our Modified Life visitors for free. Our check engine codes allow you easily diagnose any problems with your 2004 Audi TT.

Feel free to use any 2004 Audi TT auto trouble code that is listed on Modified Life but keep in mind that all information here is provided “as is” without any warranty of any kind and most of the diagnostic codes listed on our enthusiast website are submitted by the Modified Life community. Use of the 2004 Audi TT auto trouble codes information is at your own risk. Always verify all check engine codes before applying any information found here to your 2004 Audi TT.

Questions

If you have any questions pertaining to 2004 Audi TT automotive diagnostic codes, please feel free to post it at the bottom of this page and either we’ll do our best to find you the information you need or hopefully someone in the Modified Life community will have the information you’re looking for.

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2004 Audi TT Check Engine Light CEL Codes

MIL Switching Conditions (at the end of each trouble code below)

A = MIL Triggered on first occurrence
B = MIL Triggered on second occurrence
C = Non Emission related Fault – Service light only
D = Non Emission Fault – No warning light

P0101 Mass or Volume Air Flow Circuit – Range/Performance A
P0102 Mass or Volume Air Flow Circuit – Low input A
P0103 Mass or Volume Air Flow Circuit – High Input. May be due to a low battery if found with (P1580) A
P0112 IAT Sensor – Temp High – Circuit Low – G42 A
P0113 IAT Sensor – Temp Low – Circuit High – G42 A
P0116 Engine Coolant Temperature Circuit – Range/Performance Problem A
P0117 Engine Coolant Temperature Circuit – Low Input (High Temp) A
P0118 Engine Coolant Temperature Circuit – High Input (Low Temp) A
P0120 Throttle Position Sensor A – Circuit Malfunction A
P0121 Throttle Position Sensor A – Circuit – Performance Problem – Out of Range A
P0122 Throttle Position Sensor A Circuit – Low Voltage Input A
P0123 Throttle Position Sensor A Circuit – High Voltage Input A
P0125 Cooling System – Temp Too Low to Enter Closed Loop – G62 B
P0130 O2 Sensor Circuit – Malfunction (Bank 1 Sensor 1) A
P0131 O2 Sensor Circuit – Voltage Low (Bank 1 Sensor 1) B
P0132 O2 Sensor Circuit – High Voltage (Bank 1 Sensor 1) A
P0133 O2 Sensor Circuit – Slow Response (Bank 1 Sensor 1) B
P0134 O2 Sensor Circuit – No Activity Detected (Bank 1 Sensor 1) A
P0135 O2 Sensor Heater Circuit – Malfunction (Bank 1 Sensor 1) A
P0136 O2 Sensor Circuit – Malfunction (Bank 1 Sensor 2) A
P0137 O2 Sensor Circuit – Low Voltage (Bank 1 Sensor 2) B
P0138 O2 Sensor Circuit – High Voltage (Bank 1 Sensor 2) A
P0140 O2 Sensor Circuit – Slow Response (Bank 1 Sensor 2) B
P0141 O2 Sensor Heater Circuit – Malfunction (Bank 1 Sensor 2) A
P0150 O2 Sensor Circuit – Malfunction (Bank 2 Sensor 1) A
P0152 O2 Sensor Circuit – High Voltage (Bank 2 Sensor 1) A
P0153 O2 Sensor Circuit – Slow Response (Bank 2 Sensor 1)
P0154 O2 Sensor Circuit – No Activity Detected (Bank 2 Sensor 1) A
P0155 O2 Sensor Heater Circuit – Malfunction (Bank 2 Sensor 1) A
P0156 O2 Sensor Circuit – Malfunction (Bank 2 Sensor 2) A
P0158 O2 Sensor Circuit – High Voltage (Bank 2 Sensor 2) A
P0159 O2 Sensor Circuit – Slow Response (Bank 2 Sensor 2)
P0160 O2 Sensor Circuit – No Activity Detected (Bank 2 Sensor 2) A
P0161 O2 Sensor Heater Circuit – Malfunction (Bank 2 Sensor 2) A
P0170 Fuel Trim – Malfunction (Bank 1) A
P0171 Fuel Trim – System Lean (Bank 1) B
P0172 Fuel Trim – System Rich (Bank 1) B
P0173 Fuel Trim – Malfunction (Bank 2) B
P0174 Fuel Trim – System Lean (Bank 2) B
P0175 Fuel Trim – System Rich (Bank 2) B
P0300 Random Misfire Detected – Any Cylinder B
P0301 Cylinder #1 – Misfire Detected A or B / Blink
P0302 Cylinder #2 – Misfire Detected A or B / Blink
P0303 Cylinder #3 – Misfire Detected A or B / Blink
P0304 Cylinder #4 – Misfire Detected A or B / Blink
P0305 Cylinder #5 – Misfire Detected A or B / Blink
P0306 Cylinder #6 – Misfire Detected A or B / Blink
P0307 Cylinder #7 – Misfire Detected A or B / Blink
P0308 Cylinder #8 – Misfire Detected A or B / Blink
P0322 Ignition/Distributor Engine Speed Input Circuit – No Signal A or B / Blink
P0327 Knock Sensor #1 Circuit – Low Input (Bank 1 or Single Sensor) A
P0332 Knock Sensor #2 Circuit – Low Input (Bank 2) A
P0337 Crankshaft Position Sensor Circuit – Low Input A
P0341 Camshaft Position Sensor Circuit – Out of Range/Performance A
P0400 Exhaust Gas Recirculation (EGR) – Flow Malfunction B
P0401 Exhaust Gas Recirculation (EGR) – Flow Insufficient B
P0402 Exhaust Gas Recirculation (EGR) – Flow Excessive B
P0411 Secondary Air Injection System (B2) – Incorrect Flow B
P0422 Main Catalyst Efficiency – Below Threshold (Bank 1) B
P0432 Main Catalyst Efficiency – Below Threshold (Bank 2) B
P0440 Evaporative Emission Control System (EVAP) – Purge Malfunction B
P0441 Evaporative Emission Control System – Incorrect Purge Flow A
P0442 Evaporative Emission Control System – Leak Detected (small leak) B
P0452 Evaporative Emission Control System – Pressure Sensor – Low Input B
P0453 Evaporative Emission Control System – Pressure Sensor – High Input
P0455 Evaporative Emission Control System – Leak Detected (gross leak)
P0461 Fuel Level Sensor Circuit – Range/Performance B
P0501 Vehicle Speed Sensor – Range/Performance A
P0506 Idle Control Module – RPM Lower Than Expected A
P0507 Idle Control Module – RPM Higher Than Expected A
P0510 Throttle Position Sensor – Closed Switch B
P0605 Internal Control Module Read Only Memory (EPROM) Error B
P0706 Transmission Range Sensor Circuit – Range/Performance A
P0707 Transmission Range Sensor Circuit – Low Input D
P1101 O2 Sensor Circuit (B1-S1) Voltage Too Low/Air Leak D
P1102 O2 Sensor Circuit Heating Circuit (B1-S1) – Short to B+ A
P1103 O2 Sensor Circuit Heating Circuit (B1-S1) – Output Too Low A
P1104 O2 Sensor Circuit (B1-S2) Voltage Too Low – Air Leak A
P1105 O2 Sensor Circuit Heating Circuit (B1-S2) -Short to B+ A
P1106 O2 Sensor Circuit (B2-S1) Voltage Too Low – Air Leak A
P1107 O2 Sensor Circuit Heating Circuit (B2-S1) – Short to B+ A
P1108 O2 Sensor Circuit Heating Circuit (B2-S1) – Output too Low A
P1109 O2 Sensor Circuit (B2-S2) Voltage Too Low – Air Leak A
P1110 O2 Sensor Circuit Heating Circuit (B2-S2) – Short to B+ A
P1127 Long Term Fuel Trim – System too Rich (Bank 1) A
P1128 Long Term Fuel Trim – System too Lean (Bank 1) B
P1201 Cylinder #1 Fuel Injector Circuit – Electrical Malfunction B
P1202 Cylinder #2 Fuel Injector Circuit – Electrical Malfunction A
P1203 Cylinder #3 Fuel Injector Circuit – Electrical Malfunction A
P1204 Cylinder #4 Fuel Injector Circuit – Electrical Malfunction A
P1205 Cylinder #5 Fuel Injector Circuit – Electrical Malfunction A
P1206 Cylinder #6 Fuel Injector Circuit – Electrical Malfunction A
P1207 Cylinder #7 Fuel Injector Circuit – Electrical Malfunction A
P1208 Cylinder #8 Fuel Injector Circuit – Electrical Malfunction A
P1213 Cylinder #1 Fuel Injector Circuit – Short to B+ A
P1214 Cylinder #2 Fuel Injector Circuit – Short to B+ A
P1215 Cylinder #3 Fuel Injector Circuit – Short to B+ A
P1216 Cylinder #4 Fuel Injector Circuit – Short to B+ A
P1217 Cylinder #5 Fuel Injector Circuit – Short to B+ A
P1218 Cylinder #6 Fuel Injector Circuit – Shod to B+ A
P1219 Cylinder #7 Fuel Injector Circuit – Shod to B+ A
P1220 Cylinder #8 Fuel Injector Circuit – Shod to B+ A
P1225 Cylinder #1 Fuel Injector Circuit – Short to Ground A
P1226 Cylinder #2 Fuel Injector Circuit – Short to Ground A
P1227 Cylinder #3 Fuel Injector Circuit – Short to Ground A
P1228 Cylinder #4 Fuel Injector Circuit – Short to Ground A
P1229 Cylinder #5 Fuel Injector Circuit – Short to Ground A
P1230 Cylinder #6 Fuel Injector Circuit – Short to Ground A
P1231 Cylinder #7 Fuel Injector Circuit – Short to Ground A
P1232 Cylinder #8 Fuel Injector Circuit – Short to Ground A
P1237 Cylinder #1 Fuel Injector Circuit – Open Circuit A
P1238 Cylinder #2 Fuel Injector Circuit – Open Circuit A
P1239 Cylinder #3 Fuel Injector Circuit – Open Circuit A
P1240 Cylinder #4 Fuel Injector Circuit – Open Circuit A
P1241 Cylinder #5 Fuel Injector Circuit – Open Circuit A
P1242 Cylinder #6 Fuel Injector Circuit – Open Circuit A
P1243 Cylinder #7 Fuel Injector Circuit – Open Circuit A
P1244 Cylinder #8 Fuel Injector Circuit – Open Circuit A
P1250 Fuel Level Too Low A
P1325 Cylinder #1 Knock Control Limit Attained D
P1326 Cylinder #2 Knock Control Limit Attained D
P1327 Cylinder #3 Knock Control Limit Attained D
P1328 Cylinder #4 Knock Control Limit Attained D
P1329 Cylinder #5 Knock Control Limit Attained D
P1330 Cylinder #6 Knock Control Limit Attained D
P1331 Cylinder #7 Knock Control Limit Attained D
P1332 Cylinder #8 Knock Control Limit Attained D
P1339 Crankshaft Position/Engine Speed Sensors Cross connected D
P1340 Camshaft/Crankshaft Position Sensors (B2) – Out of Sequence A
P1341 Ignition Coil Power Output Stage #1 – Short to Ground A
P1343 Ignition Coil Power Output Stage #2 – Short to Ground A
P1345 Ignition Coil Power Output Stage #3 – Short to Ground A
P1391 Camshaft Position Sensor (B2) – Short to Ground A
P1392 Camshaft Position Sensor Open (B2) – Short to B+ A
P1393 Ignition Coil Power Output Stage #1 – Electrical Malfunction A
P1394 Ignition Coil Power Output Stage #2 – Electrical Malfunction A
P1395 Ignition Coil Power Output Stage #3 – Electrical Malfunction A
P1396 Engine Speed Sensor – Missing Tooth A
P1400 EGR Valve Circuit – Electrical Malfunction A
P1401 EGR Valve Circuit – Power Stage Short to Ground A
P1402 EGR Valve Circuit – Short to B+ A
P1407 EGR Temperature Sensor – Signal too Low A
P1408 EGR Temperature Sensor – Signal too High B
P1409 Tank Ventilation Valve – Electrical Malfunction B
P1410 Tank Ventilation Valve – Short to B+ A
P1411 Secondary Air Injection System (B2) – Restricted Flow A
P1414 Secondary Air Injection System (B2) – Leak Detected B
P1418 Fuel Level Sensor – Signal too High B
P1420 Secondary Air Injection System Control Module – Electrical Malfunction
P1421 Secondary Air Injection System Control Valve Circuit – Short to Ground A
P1422 Secondary Air Injection System Control Valve Circuit – Short to B+ A
P1423 Secondary Air Injection System (B1) – Flow too Low A
P1424 Secondary Air Injection System (B1) – Leak Detected B
P1425 Tank Ventilation Valve – Short to Ground A
P1426 Tank Ventilation Valve – Open Circuit A
P1434 Secondary Air Injection System Pump Relay Circuit – Short to B+ A
P1436 Secondary Air Injection System Pump Relay Circuit – Electrical Malfunction A
P1440 EGR Valve Circuit – Power Stage Open A
P1450 Secondary Air Injection System Pump Relay Circuit – Short to B+ A
P1451 Secondary Air Injection System Pump Relay Circuit – Short to Ground A
P1452 Secondary Air Injection System Pump Relay Circuit – Open Circuit A
P1470 EVAP Emission Control System L.D.P Circuit – Malfunction A
P1471 EVAP Emission Control System L.D.P. Circuit – Short to B+ A
P1475 EVAP Emission Control System L.D.P. – Malfunction Signal Circuit open A
P1476 EVAP Emission Control System L.D.P. – Malfunction/Insufficient Vacuum A
P1500 Fuel Pump Relay Circuit – Electrical Malfunction A
P1502 Fuel Pump Relay Circuit – Short to B+ A
P1504 Intake Air System Bypass Air Determined A
P1505 CTP Switch not Closing – Open Circuit A
P1506 CTP Switch not Opening – Short to Ground A
P1509 IAC Circuit – Electrical Malfunction A
P1510 IAC Circuit – Short to B+ A
P1511 Intake Manifold Changeover Valve Circuit – Electrical Malfunction A
P1512 Intake Manifold Changeover Valve Circuit – Short to B+ D
P1543 Throttle Actuation Potentiometer – Signal too Low D
P1544 Throttle Actuation Potentiometer – Signal too High A
P1545
P1559
P1580 Throttle Actuator (B1) Fault – May be caused by low battery if found with 16487 (P0103) A
P1582 Idle Adaption at Limit B
P1600 Power Supply (B+) Terminal 15 – Low Voltage B
P1602 Power Supply (B+) Terminal 30 – Low Voltage D
P1606 Rough Road Spec. Engine Torque ABS-SG – Electrical Malfunction A
P1611 MIL Call-up Circuit/Transmission Control Module – Short to Ground D
P1612 ECM – Incorrectly Coded A
P1613 MIL Call-up – Circuit Open or Short to B+ A
P0603 Control Unit Failure or Internal Control Module Keep Alive Memory (KAM) Error or Power Failure to Control Unit or Bad Ground Contacts or No Faults Recorded (If MIL Not Illuminated) A
P0217 Temp Light – Engine Hot A
P0218 Temp Light – Transaxle Hot D+ Temp Lamp
P0326 Knock Sensor – Constant Knock D+ Temp Lamp
P0351 Ignition – Faulty D
P0352 Ignition – Faulty D
P0420 Converter – Low Efficiency D
P0443 EVAP Purge – Circuit Fault A
P0500 VSS Sensor – No Signal D
P0560 Battery Voltage – Out of Range A
P0561 Battery Voltage – Unstable D
P0562 Battery Voltage – Low D
P0563 Battery Voltage – High D
P0565 Cruise Control – Circuit Fault D
P0571 Brake Switch – Circuit Fault D
P0572 Brake Switch – Low Voltage D
P0573 Brake Switch – High Voltage D
P0600 PCM – No Serial Data D
P0601 EPROM – Fault A
P0602 PCM Program – Fault A
P0604 PCM RAM Memory – Fault A
P0606 PCM Processor – Fault A
P1782 Engine/Transmission Data Electrical Connection Ignition Intervention. Also check for loose ECM power relay. A

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