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Old 07-19-2005, 06:40 PM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #1 (permalink)
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How To Read OBD II Codes and Code Meanings (ecu)

Hey there Ive been researching and reading up on obd-II Diagnostics codes and etc i know some of can be lazy and not want to look them up but this is a good how to and helpful thread to those with obd-II Readers which you can purchase at any pepboys,kragens,etc, well here goes a list of ecu codes

PO100 Volume Air Flow Circuit Malfunction
PO105 Barometric Pressure circuit Malfunction
Po107 Map Sensor Voltage Too low
PO108 Map Sensor Voltage Too High
PO110 IAT Circuit Malfunction
PO112 IAT Sensor Voltage Low
PO113 IAT Sensor Voltage High
PO115 ECT Circuit Malfunction
PO117 ECT Sensor Voltage too Low
PO118 ECT Sensor Voltage too High
PO120 Tp Sensor Malfunction
PO121 Tp Sensor Fault
PO121 TP Sensor Voltage Does not agree With MAP(m/t)
PO122 TP sensor Reference Signal Voltage Too low
PO123 TP sensor Reference Signal voltage too high
PO125 Closed Loop Temperature Not Reached(m/t)
PO125 Excessive Time To Enter Closed loop fuel Control
PO130 o2 Sensor Circuit Malfunction (Bank 1 sensor 1)
PO131 Upstream HO2S Voltage grounded
PO132 Upstream HO2S Shorted to Voltage
PO133 Upstream HO2S Response (m/t)
PO134 Upstream Ho2S stays at center
PO135 o2 Sensor Heater Circuit Malfunction (bank 1 Sensor 1)
PO136 o2 sensor circuit malfunction (Bank 1 sensor 2)
PO137 Downstream HO2S Voltage Grounded
PO138 Downstream HO2S Shortage to voltage (m/t)
PO139 Downstream HO2S Stays at center (m/t)
PO141 Downstream Ho2S Heater Failure (m/t)
PO141 o2 sensor heater Circuit Malfunction (Bank 1 sensor 2)
PO170 Fuel Trim Malfunction
PO171 Fuel System to lean
PO171 Fuel System to Rich
PO201 Injector #1 Control Circuit
PO202 Injector #2 Control Circuit
PO203 Injector #3 Control Circuit
PO204 Injector #4 Control Circuit
PO220 Fuel Pimp Relay Control Circuit
PO300 Mulitiple Cyliner Misfire (m/t)
PO301 Cylinder #1 Misfire
PO302 Cylinder #2 Misfire
PO303 Cylinder #3 Misfire
PO304 Cylinder #4 Misfire
PO325 Knock Sensor #1 Circuit
PO335 No Crankshaft Reference Signal At PCM
PO335 CKP Sensor Circuit Malfunction
PO351 Ignition Coil #1 Primary Circuit
PO352 Ignition Coil #2 Primary Circuit
PO340 NO Cam Signal at PCM
PO340 CMP Sensor Circuit Malfunction
PO400 EGR Flow Malfunction
PO401 EGR System Failure
PO403 EGR SOlenoid Circuit
PO411 Too little or To mcuh secondary Air(m/t)
PO412 Pulsed Secondary air injection solenoid circuit(m/t)
PO420 Catalyst Effiecncy below threshold (bank 1)
PO422 Cataltic Converter effiency failure
PO440 Evaporative Emission control system malfunction
PO441 Evaporative Purge Flow Monitor Failure
PO442 EVAP Leak Monitor Small Leak detected
PO443 EVAP Solenoid Circuit
PO443 EVAP COntrol System Purge Control Valve Circuit Malfunction
PO455 EvAP Leak Monitor Large Leak Detected
PO500 No Vehicle Speed Sensor Signal/Sensor Malfunction
PO505 Idle air/control Motor Malfunction
PO510 Closed Throttle Position switch
PO551 Power Steering Pressure Switch Failure (m/t)
PO605 INternal Controller Failure
PO605 PCM Failure-SPI Communications
PO700 Transmission Failure
PO700 EATX COntroller DTC Center
PO705 Transaxle Range sensor Circuit Malfunction
PO710 Transaxle Fluid Temparture Sensor Circuit Failure
P1103 Turbocharger Wastegate Actuator Malfunction
P1104 Turbocharger wastegate solenoid Malfunction
P1105 Fuel Pressure Solenoid Malfunction (turbo)4g63t
P1294 Target Idle Not reached Within 200RPM (m/t)
P1295 No 5 Volts to TP sensor
P1296 No 5 Volts to MAP Sensor
P1297 No Change in MAP from Start To Run
P1300 Ignition Timing adjustment Circuit Malfunction
P1390 Timing Belt Skipped 1 Tooth Or More
P1391 Intermitlent Loss of CMP Or CKP
P1400 Manifold Differential Pressure Sensor Circuit Malfunction
P1486 EVAP Leak Monitor Pinch Hose Found
P1487 High Speed Radiator Fan Control Relay
P1489 High Speed Fan Control Relay Circuit
P1490 Low Speed Fan Control Relay Circuit
P1492 Battery Temparture Sensor Voltage To High
P1493 Battery Temparture Sensor Voltage to Low
P1494 Evaporative Emissions Ventalation Solenoid switch Or Mechanical Fault
P1495 Evaporative Emissions Ventalation Solenoid Circuit
P1496 5 Volts Supply to low
P1500 Generator FR Terminal Circuit Malfunction
P1600 Serial Communications Link failure
P1698 No CCD Message from TCM (A/T)
P1715 PG Assembly malfunction
P1750 Solenoid Assembly Malfunction
P1791 Engine Coolant temparture Level Input Circuit to Tcm failure
P1899 Park/NeutralPosition switch failure

If you dont know what the abbrv are like TP,MAP,ETC I will post them here for you those are sensors for those trying to figure this out here goes

TP=Throttle Position Sensor
CPS=Crankshaft Postioning Sensor
IAT-Intake Temparture Sensor
MPS-Motor Position Sensor
o2-Oxygen Sensor
ECT-Engine Coolant Temparture Sensor
MAF-Mass Air Flow sensor
BPS-Barometric Pressure Sensor
CPS-Camshaft Positioning sensor
EGR-Exhaust Gas Recirculation(California Emissions)

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