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

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Engine managementttransmission<br />

<strong>Trouble</strong> code identification - EOBD type<br />

EOBD<br />

type<br />

PO<br />

PI294<br />

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

Refer to EOBD trouble code table<br />

Idle speed control (ISC) system -<br />

rpm lowerlhigher than expected<br />

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

supply voltage<br />

Manifold absolute pressure (MAP) sensor<br />

Crankshaft position (CKP) sensorlcamshaft<br />

position (CMP) sensor - intermittent signal<br />

Engine control module (ECM) - misfire<br />

detection limit reached<br />

Evaporative emission (EVAP) system -<br />

blockage detected<br />

Battery ambient temperature sensor -<br />

voltage high<br />

Battery ambient temperature sensor -<br />

voltage low<br />

Evaporative emission (EVAP) leak detection<br />

pump - pressure switch<br />

Evaporative emission (EVAP) leak detection<br />

pump solenoid<br />

Engine control module (ECM) - EEPROM<br />

error<br />

Governor pressure not equal to target<br />

(15-20 PSI) - mid pressure malfunction<br />

Governor pressure not equal to target -<br />

low pressure malfunction<br />

Governor pressure sensor - incorrect signal<br />

Governor pressure sensor - signal high<br />

Governor pressure sensor - signal low<br />

Transmission system relay<br />

Parklneutral position (PNP) switch - input<br />

circuit malfunction<br />

Probable cause<br />

-<br />

Wiring, air leak, throttle valve tightlsticking, IAC valve<br />

Wiring, MAP sensor, ECM<br />

Wiring, hose connection(s), MAP sensor<br />

Wiring, poor connection, air gap, CKP sensor, CMP sensor<br />

Wiring, poor connection, engine mechanical fault, ignitionlfuel<br />

system, CKP sensor, ECM<br />

Hose connection(s), hose blockedltrapped, EVAP canister<br />

Wiring, battery ambient temperature sensor, ECM<br />

Wiring, battery ambient temperature sensor, ECM<br />

Wiring, hose leaklblockage, EVAP leak detection pump<br />

Wiring open circuitlshort circuit, hose leaklblockage, EVAP<br />

leak detection pump solenoid<br />

ECM<br />

Signal wire open circuitlshort circuit, valve body, sensor supply<br />

wire open circuit, transmission fluid level, governor pressure<br />

solenoid, transmission mechanical fault, ECM - no 5 volt supply<br />

Signal wire open circuitlshort circuit, valve body, sensor supply<br />

wire open circuit, transmission fluid level, governor pressure<br />

solenoid, transmission mechanical fault, ECM - no 5 volt supply<br />

Signal wire short circuit to earthlpositive, supply wire open<br />

circuitlshort circuit, transmission fluid level, governor pressure<br />

solenoid, governor pressure sensor, ECM<br />

Signal wire short circuit to positive, supply wire open circuit,<br />

transmission fluid level, governor pressure sensor, ECM<br />

Signal wire short circuit to earth, supply wire open circuit,<br />

transmission fluid level, governor pressure sensor, ECM<br />

Wiring open circuitlshort circuit, transmission system relay, ECM<br />

Wiring, PNP switch, ECM

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