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

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I<br />

Engine management I<br />

<strong>Fault</strong> location<br />

Probable cause<br />

Malfunction indicator lamp (MIL) - circuit malfunction<br />

Mass air flow (MAF) sensor<br />

Mixture control (MC)<br />

I Wiring, supply voltage, MIL lamp<br />

- - - -<br />

1 Wiring, intake leak, air filter blocked, MAF sensor, ECM<br />

Fuel level low, fuel pressurelpump, intakelexhaust leak,<br />

misfire, MAPlMAF sensor, H02S, EVAP canister purge<br />

valve, injector(s), excessive fuel in engine oil<br />

Mixture control (MC) - rich 1 Wiring, injector, fuel pressure, MAF sensor, ECM<br />

Mixture control (MC) - weak<br />

Supply voltage<br />

rn Throttle position (TP) sensor<br />

Vehicle speed signal<br />

Wiring, air leak, fuel pressure, ignition system, injector,<br />

MAF sensor, H02S, ECM<br />

I Wiring, fuses, battery, alternator, ignition switch<br />

Wiring, TP sensor, ECM<br />

Wiring, VSS, ECM<br />

M 1.5.5: Located in mass air flow (MAF) sensor.<br />

rn M 1.5.5: Located in idle speed control (ISC) actuatorlthrottle motor

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