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Autodata - Diagnostic Trouble Codes Fault locations and probable causes - 2004 edition

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<strong>Trouble</strong><br />

code<br />

PO087<br />

Probable cause<br />

Fuel pressure regulator - performance problem<br />

Fuel metering sdenoid - open circuit<br />

Fuel metering solenoid - short to earth<br />

Fuel metering solenoid - short to positive<br />

Fuel system leak - large leak detected<br />

Fuel system leak - small leak detected<br />

Fuel pressure regulator, mechanical fault<br />

Wiring open circuit, fuel metering solenoid, ECM<br />

Wiring short to earth, fuel metering solenoid, ECM<br />

I Wirina short to positive, fuel meterina solenoid, ECM<br />

Wiring, fuel pressure sensor, mechanical fault<br />

Wiring, fuel pressure sensor, mechanical fault<br />

Intake air temperature (IAT) sensor 2 - circuit malfunction Wiring, poor connection, IAT sensor, ECM<br />

Intake air temperature (IAT) sensor 2 -<br />

Wiring, poor connection, IAT sensor, ECM<br />

circuit rangelperformance<br />

Intake air temperature (IAT) sensor 2 - circuit low input Wiring short to earth, IAT sensor, ECM<br />

Intake air temperature (1AT) sensor 2 - circuit high input<br />

Intake air temperature (IAT) sensor 2 -<br />

circuit intermittederratic<br />

Mass air flow (MAF) sensorfvolume air flow (VAF)<br />

sensor - circuit malfunction<br />

Mass air flow (MAF) sensorlvolume air flow (VAF)<br />

sensor - rangelperformance problem<br />

Mass air flow (MAF) sensorlvolume air flow (VAF)<br />

sensor - low input<br />

Mass air flow (MAF) sensorlvolume air flow (VAF)<br />

sensor - high input<br />

Mass air flow (MAF) sensorlvolume air flow (VAF)<br />

sensor - circuit intermittent<br />

Manifold absolute pressure (MAP) sensorlbarometric<br />

pressure (BARO) sensor - circuit malfunction<br />

Manifold absolute pressure (MAP) sensor/barometric<br />

pressure (BARO) sensor - range/performance -<br />

problem<br />

Manifold absolute pressure (MAP) sensor/barometric<br />

pressure (BARO) sensor - low input<br />

Manifold absolute pressure (MAP) sensor/barometric<br />

pressure (BARO) sensor - hiah input<br />

Manifold absolute pressure (MAP) sensorlbarometric<br />

pressure (BARO) sensor - circuit intermittent<br />

Intake air temperature (IAT) sensor - circuit malfunction<br />

I<br />

Wiring short to positive, IAT sensor, ECM<br />

Wiring, poor connection, IAT sensor, ECM<br />

Wiring, MAFNAF sensor, ECM<br />

Intake leaklblockage, MAFNAF sensor<br />

Wiring short to earth, MAFNAF sensor, ECM<br />

Wiring short to positive, MAFNAF sensor, ECM<br />

Wiring, poor connection, MAFNAF sensor, ECM<br />

Wiring, MAP sensor, BAR0 sensor, ECM<br />

lntakelexhaust leak, wiring, MAP sensor,<br />

BAR0 sensor<br />

Wiring short to earth, MAP sensor, BAR0 sensor,<br />

ECM<br />

Wiring short to positive, MAP sensor, BAR0 sensor,<br />

ECM<br />

Wiring, poor connection, MAP sensor, BAR0 sensor,<br />

ECM<br />

Wiring, IAT sensor, ECM<br />

Intake air temperature (IAT) sensor - rangelperformance IAT sensor<br />

problem<br />

Intake air temperature (IAT) sensor - low input<br />

Wiring short to earth, IAT sensor, ECM<br />

1<br />

Intake air temperature (IAT) sensor - high input Wiring open circuitlshort to positive, earth wire<br />

defective, IAT sensor, ECM<br />

lntake air temperature (IAT) sensor - circuit intermittent 1 Wiring, poor connection, IAT sensor, ECM<br />

I<br />

Engine coolant temperature (ECT) sensor -<br />

Wiring, ECT sensor, ECM<br />

circuit malfunction<br />

Engine coolant temperature (ECT) sensor -<br />

Coolant thermostat, poor connection, wiring,<br />

ranaelperformance problem<br />

ECT sensor<br />

Engine coolant temperature (ECT) sensor - low input Coolant thermostat, wiring short to earth, ECT sensor<br />

Engine coolant temperature (ECT) sensor - high input<br />

Coolant thermostat, wiring open circuitlshort to<br />

positive, earth wire defective, ECT sensor

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