Diagnostic OBDII Codes for a Gallardo

Just like any other North American car made after 1996, the Diablo has an On Board Diagnostic or "OBDII socket" for a OBDII scan tool. Government mandated rules specify that after the check engine warning light comes on due to a fault, the engine control unit must record a specific error code. The purpose of this code is to give precise information to the service technician concerning the fault to allow its repair.

Fig 1 OBDII Socket Pins

Pin 2 - J1850 Bus+ Pin 4 - Chassis Ground Pin 5 - Signal Ground Pin 6 - CAN High (J-2284) Pin 7 - ISO 9141-2 K Line Pin 10 - J1850 Bus
Pin 11 Airbag Controller
Pin 12 ABS Controller
Pin 14 - CAN Low (J-2284) Pin 15 - ISO 9141-2 L Line Pin 16 - Battery Power

While the parameters, or readings, required by OBDII regulations are uniform, the auto manufacturers had some latitude in the communications protocol they used to transmit those readings to scanners. Naturally, each felt they had the one true way, so we have three different OBDII communications protocols in use.

As a rule of thumb, GM cars and light trucks use SAE J1850 VPW (Variable Pulse Width Modulation).
Chrysler products and all European and most Asian imports use ISO 9141 circuitry.
Fords use SAE J1850 PWM (Pulse Width Modulation) communication patterns.

Unlike the Diablo, the Gallardo does not put out OBDII codes that are compatible with older diagnostic readers.

The Gallardo issues information at the OBDII socket on the CAN lines (Pins 6 & 14). For this reason if you wish to read error information you must have one of the newer OBDII readers that understands the CAN data lines. Most past recent cars are switching to this format and the newer OBDII readers are being modified to understand it. I have not looked into this area extensively yet. Currently I am using the "ElmScan 5 Scan Tool". There are a number of software packages that work with this unit. I like "PCMSCAN". I had a bad experience with one called PRScan (no technical support). The ElmScan interface connects to a laptop, so you can expect the software to evolve over time. With the above setup you can get an enormous amount of real time information about your engine. According to the Lamborghini Gallardo technical manual the following engine codes are put out:-

Component/System Fault code Monitor Strategy Description Primary malfunction detection parameter Fault Activation range Time length of the fault Frequency of check

CATALYST SYSTEM EFF.

Bank 1

P0420 Functional check front/rear oxygen ratio < 4 5 faults in 10 times Once per driving cycle

CATALYST SYSTEM EFF.

Bank 2

P0430 Functional check front/rear oxygen ratio < 4 5 faults in 10 times Once per driving cycle

RANDOM MISFIRE P0300 Random Misfire detection

RANDOM MISFIRE

Bank1

P1305 Misfire detection with exhaust Pressure sensor Misfire Index AND Harmonics Amplitude of Exhaust pressure signal MI>Threshold AND HA Off Range function of RPM and MAP 1s Continuous

RANDOM MISFIRE
Bank2
P1306 Misfire detection with exhaust Pressure sensor Misfire Index AND Harmonics Amplitude of Exhaust pressure signal MI>Threshold AND HA Off Range function of RPM and MAP 1s Continuous

CYLINDER 1 MISFIRE DETECTED P0301 Misfire detection with exhaust Pressure sensor Misfire Index, Harmonics Amplitude AND Phase of Exhaust pressure signal MI>Threshold HA in Range AND Phase in Range function of RPM and MAP 1s Continuous

CYLINDER 2 MISFIRE DETECTED P0302 Misfire detection with exhaust pressure sensor Same as P0301

CYLINDER 3 MISFIRE DETECTED P0303 Misfire detection with exhaust pressure sensor Same as P0301

CYLINDER 4 MISFIRE DETECTED P0304 Misfire detection with exhaust pressure sensor Same as P0301

CYLINDER 5 MISFIRE DETECTED P0305 Misfire detection with exhaust pressure sensor Same as P0301

CYLINDER 6 MISFIRE DETECTED P0306 Misfire detection with exhaust pressure sensor Same as P0301

CYLINDER 7 MISFIRE DETECTED P0307 Misfire detection with exhaust pressure sensor Same as P0301

CYLINDER 8 MISFIRE DETECTED P0308 Misfire detection with exhaust pressure sensor Same as P0301

CYLINDER 9 MISFIRE DETECTED P0309 Misfire detection with exhaust pressure sensor Same as P0301

CYLINDER 10 MISFIRE DETECTED P0310 Misfire detection with exhaust pressure sensor Same as P0301

Component/System Fault code Monitor Strategy Description Primary malfunction detection parameter Fault Activation range Time length of the fault Frequency of check

EXHAUST PRESSURE SENSOR

BANK 1

P1311 Functional check Exhaust sensor pressure signal MI < Threshold 10 s Continuous

P1312 Low input Exhaust sensor pressure signal < 0.5 V 10 s Continuous

P1313 High input Exhaust sensor pressure signal > 4.9 V 10 s Continuous

EXHAUST PRESSURE SENSOR

Bank 2

P1314 Functional check Exhaust sensor pressure signal MI < Threshold 10 s Continuous

P1315 Low input Exhaust sensor pressure signal < 0.5 V 10 s Continuous

P1316 High input Exhaust sensor pressure signal > 4.9 V 10 s Continuous

Component/System Fault code Monitor Strategy Description Primary malfunction detection parameter Fault Activation range Time length of the fault Frequency of check

OXYGEN SENSOR FRONT

Bank 1

P0133 Response Rate Switching frequency AND Quick output change counter S_FREQ < 15 or QOCC < 60 Once per driving cycle

P0134 Oxygen sensor inactive Oxygen sensor output voltage 0.4 < V < 0.55 60 s Continuous

P2195 Oxygen sensor stuck lean Oxygen sensor output voltage 0.01 ≤ V < 0.4 30 s Continuous

P2196 Oxygen sensor stuck rich Oxygen sensor output voltage 0.55 < V < 1.05 60 s Continuous

P0131 Oxygen sensor locked lean Oxygen sensor output voltage < 0.01 V 30 s Continuous

P0132 Oxygen sensor locked rich Oxygen sensor output voltage ≥ 1.05 V 60 s Continuous

OXYGEN SENSOR REAR

Bank 1

P0140 Oxygen sensor inactive Oxygen sensor output voltage 0.4 < V < 0.55 60 s Continuous

Transient test Oxygen sensor output voltage V> 0.5 10 times Continuous

V< 0.5 10 times Continuous

P2270 Oxygen sensor stuck lean Oxygen sensor output voltag 0.01 ≤ V < 0.1 300 s Continuous

P2271 Oxygen sensor stuck lean Oxygen sensor output voltag 0.07 < V < 1.05 300 s Continuous

P0137 Oxygen sensor locked lean Oxygen sensor output voltage < 0.01 V 300 s Continuous

P0138 Oxygen sensor locked rich Oxygen sensor output voltage ≥ 1.05 V 300 s Continuous

OXYGEN HEATER FRONT

Bank 1

P0135 Functional check Oxygen sensor output voltage 0.4 < V < 0.55 5 s Once per driving cycle

OXYGEN HEATER REAR

Bank 1

P0141 Functional check Oxygen sensor output voltage 0.4 < V < 0.55 10 s Once per driving cycle

Component/System Fault code Monitor Strategy Description Primary malfunction detection parameter Fault Activation range Time length of the fault Frequency of check

OXYGEN SENSOR FRONT

Bank 2

P0153 Response Rate Switching frequency AND Quick output change counter Same as P0133 Once per driving cycle

P0154 Oxygen sensor inactive Oxygen sensor output voltage 0.4 < V < 0.55 60 s Continuous

P2197 Oxygen sensor locked lean Oxygen sensor output voltage 0.01 ≤ V < 0.4 30 s Continuous

P2198 Oxygen sensor locked rich Oxygen sensor output voltage 0.55 < V < 1.05 60 s Continuous

P0151 Oxygen sensor locked lean Oxygen sensor output voltage < 0.01 V 30 s Continuous

P0152 Oxygen sensor locked rich Oxygen sensor output voltage ≥ 1.05 V 60 s Continuous

OXYGEN SENSOR REAR

Bank 2

P0160 Oxygen sensor inactive Oxygen sensor output voltage 0.4 < V < 0.55 60 s Continuous

Transient test Oxygen sensor output voltage V> 0.5 10 times Continuous

V< 0.5 10 times Continuous

P2272 Oxygen sensor locked lean Oxygen sensor output voltage 0.01 ≤ V < 0.1 300 s Continuous

P2273 Oxygen sensor locked rich Oxygen sensor output voltage 0.07 < V < 1.05 300 s Continuous

P0157 Oxygen sensor locked lean Oxygen sensor output voltage < 0.01 V 300 s Continuous

P0158 Oxygen sensor locked rich Oxygen sensor output voltage ≥ 1.05 V 300 s Continuous

OXYGEN HEATER FRONT Bank 2 P0155 Functional check Oxygen sensor output voltage 0.4 < V < 0.55 5 s Once per driving cycle

OXYGEN HEATER REAR Bank 2 P0161 Functional check Oxygen sensor output voltage 0.4 < V < 0.55 10 s Once per driving cycle

INTAKE CAMSHAFT POSITION SENSOR
Bank 1 P0341 Response Cam sensor signal Repetition of the same sector of the cam signal after one revolution of thecrankshaft 20 times Continuous

Component/System Fault code Monitor Strategy Description Primary malfunction detection parameter Fault Activation range Time length of the fault Frequency of check

EXHAUST CAMSHAFT POSITION SENSOR
Bank 1 P0366 Response Cam sensor signal Repetition of the same sector of the cam signal after one revolution of the crankshaft 20 times Continuous

INTAKE CAMSHAFT POSITION SENSOR
Bank 2 P0346 Response Cam sensor signal Repetition of the same sector of the cam signal after one revolution of the crankshaft 20 times Continuous

EXHAUST CAMSHAFT POSITION SENSOR
Bank 2 P0391 Response Cam sensor signal Repetition of the same sector of the cam signal after one revolution of the 20 times Continuous

Component/System Fault code Monitor Strategy Description Primary malfunction detection parameter Fault Activation range Time length of the fault Frequency of check

crankshaft

CRANKSHAFT POSITION SENSOR P0336 Response Crank sensor signal If the same tooth of the crankshaft

flywheel is recognized after two consecutive

edges of the cam signal 20 times Continuous

SIGNAL SEQUENCE P1310 Response Intermittent loss of signal (blip) coherence between sectors

of the cam signal and specific teeth of the crankshaft

flywheel 20 times Continuous

MANIFOLD ABSOLUTE PRESSURE /

BAROMETRIC PRESSURE

P0105 Functional check Comparison between manifold absolute pressure and barometric pressure > 30 mmHg At the key on

P1106 Functional check Comparison between ECU bank1 value and ECU bank2 value > 25mmHg 4 s Continuous

P1107 Low input Manifold absolute pressure sensor signal < 105 mmHg 16 s Continuous

P1108 High input Manifold absolute pressure sensor signal > 809 mmHg 16 s Continuous

P1109 Low input Barometric pressure sensor signal < 105 mmHg 16 s Continuous

P1110 High input Barometric pressure sensor signal > 809 mmHg 16 s Continuous

BATTERY VOLTAGE P1101 Low output Battery voltage < 10 V 20 times Continuous

P1102 High output Battery voltage > 15 V 20 times Continuous

Component/System Fault code Monitor Strategy Description Primary malfunction detection parameter Fault Activation range Time length of the fault Frequency of check

ENGINE COOLANT TEMPERATURE P0116 Functional check Comparison between ECU LIE value and CAN BUS value > 15 °C 5 s Continuous

P0117 Low Input Coolant temperature sensor < -20 °C 250 s Continuous

P0118 High input Coolant temperature sensor > 120 °C 1 s Continuous

IDENTIFICATION “LIE” ECU P1601 Range check Pin detection No pin detected 10 times At the key on

INTAKE AIR TEMPERATURE P0111 Functional check Derivative Air temperature sensor signal > 15 °C/0.5 sec 5 sec Continuous

P0112 Low input Air temperature sensor < -25° C 1200 s Continuous

P0113 High input Air temperature sensor > 120 °C 1s Continuous

DRIVE BY WIRE P0226 Functional check Data Component found failed Continuous

P0227 Low input Throttle position signal < 0° 5 s Continuous

P0228 High input Throttle position signal > 81° 5 s Continuous

P1226 set in case of throttle malfunction detected by ECU Bank 1

P1227 set in case of throttle malfunction detected by ECU Bank 2

PEDAL POSITION P0121 Functional check Comparison between sensor “A” and sensor “B” > 10% 3 s Continuous

P0122 Pedal position sensor “A” Low Input Pedal position signal < Threshold 5 s Continuous

P0123 Pedal position sensor “A” High Input Pedal position signal > Threshold 5 s Continuous

P0222 Pedal position sensor “B” Low Input Pedal position signal < Threshold 5 s Continuous

P0223 Pedal position sensor “B” High Input Pedal position signal > Threshold 5 s Continuous

Component/System Fault code Monitor Strategy Description Primary malfunction detection parameter Fault Activation range Time length of the fault Frequency of check

EVAPORATIVE EMISSION CONTROL SYSTEM P0441 Insufficient Purge Flow Evaporative System Pressure <Threshold 3 s Once per driving cycle

P0442 Leak detected Evaporative System Pressure <Threshold 20 s same as P0441

P0443 Purge Control Valve Malfunction Feedback-test Incorrect data feedback Once per driving cycle

P0446 Vent Control Valve Malfunction Feedback-test Incorrect data feedback Once per driving cycle

P0450 Pressure Sensor Malfunction Evaporative System Pressure < -1 mbar or > 1 mbar at Key-on

Evaporative System Pressure >4.9 V continuos

Evaporative System Pressure < 0.5 V continuos

Evaporative System Pressure < -15 mbar or > 3 s Once per driving

5 mbar cycle

IDLE CONTROL SYSTEM P0506 Functional check RPM RPMf(TH2O) RPM < 10 s Once per driving cycle

< 840 rpm 5 s Once per driving cycle

P0507 Functional check RPM RPM > RPMf(TH2O) 10 s Once per driving cycle

> 1080 rpm 5 s Once per driving cycle

SERIAL COMMUNICATION P0600 ISO 9141 Line failure Data communications Incorrect data feedback Once per driving cycle

INTERNAL CONTROL MODULE P0605 Internal routine Data Component found failed Once per driving cycle

Component/System Fault code Monitor Strategy Description Primary malfunction detection parameter Fault Activation range Time length of the fault Frequency of check

FUEL SYSTEM Bank 1 P0171 Fuel trim system too lean Fuel trim correction > +0.75 ms 30 s Continuous

P0172 Fuel trim system too rich Fuel trim correction < -0.75 ms 30 s Continuous

FUEL SYSTEM Bank 2 P0174 Fuel trim system too lean Fuel trim correction > +0.75 ms 30 s Continuous

P0175 Fuel trim system too rich Fuel trim correction < -0.75 ms 30 s Continuous

Component/System Fault code Monitor Strategy Description Primary malfunction detection parameter Fault Activation range Time length of the fault Frequency of check

CATALYST TEMPERATURE

Bank 1

P1401 Catalyst overtemp.
1st level Catalyst temp sensor signal > 900 °C < 940 °C 1 s Continuous

P1402 Catalyst overtemp.
2nd level Catalyst temp sensor signal > 940 °C 1 s Continuous

P0427 Low input Catalyst temp sensor signal < 20°C 60 s Continuous

P0428 High input Catalyst temp sensor signal 970°C At The Key on

CATALYST TEMPERATURE

Bank 2

P1405 Catalyst overtemp.
1st level Catalyst temp sensor signal > 900 °C < 940 °C 1 s Continuous

P1406 Catalyst overtemp.
2nd level Catalyst temp sensor signal > 940 °C 1 s Continuous

P0437 Low input Catalyst temp sensor signal < 20°C 60 s Continuous

P0438 High input Catalyst temp sensor signal 970°C At The Key on

CATALYST TEMPERATURE P1426 Functional check |Catalyst temp sensor signal > 200°C 60 s Continuous

Bank1 - Catalyst temp sensor

signal Bank2|

CAN COMMUNICATION P1602 Data failure Data communications Incorrect data feedback 3 s Continuous

THERMOSTAT P0128 Functional check Engine Coolant Temperature < 70 °C 5 s Once per driving cycle

SECONDARY AIR INJECTION Bank1 P0491 Functional check Oxygen sensor output voltage V > 0.3 [V] 2s Once per driving cycle

SECONDARY AIR INJECTION Bank2 P0492 Functional check Oxygen sensor output voltage V > 0.3 [V] 2s Once per driving cycle

SECONDARY AIR INJECTION P0412 Electro Valve feedback-test Feedback-test Incorrect data Once per driving

ELECTRO VALVE feedback cycle

Component/System Fault code Monitor Strategy Description Primary malfunction detection parameter Fault Activation range Time length of the fault Frequency of check

OIL TEMPERATURE P0197 Low input Oil temperature signal output < 20 bit 2s Continuous

P0198 High input Oil temperature signal output > 1000 bit 2s Continuous

INTAKE VARIABLE VALVE TIMING CONTROL Bank1 P1366 Functional check VVT position Target - VVT position 10 deg 2s Continuous

EXHAUST VARIABLE VALVE TIMING CONTROL Bank1 P1367 Functional check VVT position Target - VVT position 10 deg 2s Continuous

INTAKE VARIABLE VALVE TIMING CONTROL Bank2 P1368 Functional check VVT position Target - VVT position 10 deg 2s Continuous

EXHAUST VARIABLE VALVE TIMING CONTROL Bank2 P1369 Functional check VVT position Target - VVT position 10 deg 2s Continuous