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

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IEngine management<br />

<strong>Trouble</strong> code identification<br />

I I I<br />

No fault found<br />

112 Enqine control module (ECM)<br />

113 / Fuel trim (FT) - too weaklrich<br />

Probable cause<br />

ECM<br />

Intake leaklblockage, excessive fuel in engine oil,<br />

fuel pressure, wiring, MAF sensor, H02S<br />

113 0 I Fuel trim (FT) - too weak Intake leak, fuel pressure low, wiring, MAF sensor,<br />

H02S<br />

121 I Mass air flow (MAF) sensor Wiring, MAF sensor<br />

123 I Engine coolant temperature (ECT) sensor Wiring, ECT sensor<br />

131 I lgnition control module (ICM) - engine RPM signal Wiring<br />

131<br />

132<br />

133<br />

Engine speed (RPM) sensor - no signal<br />

Engine control module (ECM) - supply voltage lowlhigh<br />

Throttle position (TP) switch - CTP contacts<br />

Wiring, air gap, RPM sensor<br />

Battery, alternator<br />

TP switch adjustment, accelerator cable adjustment,<br />

wiring, TP switch<br />

142 Ignition control module (ICM)<br />

ICM<br />

143<br />

144<br />

Knock sensor (KS) 1<br />

Engine control module (ECM) - load signal<br />

Wiring, KS<br />

Wiring, ECM<br />

154<br />

212<br />

Exhaust gas recirculation (EGR) system - excessive flow<br />

detected<br />

Heated oxygen sensor (H02S)<br />

Throttle position (TP) switch - WOT contacts<br />

Wiring, EGR valve, EGR control module, engine<br />

coolant thermostat<br />

Wiring, heating inoperative, MAF sensor, H02S<br />

TP switch adjustment, accelerator cable adjustment,<br />

wiring, TP switch<br />

214 I Engine speed (RPM) sensor - intermittent signal Wiring, flywheelldrive plate damaged, air gap,<br />

RPM sensor<br />

221 Fuel trim (FT), part load - too weak<br />

lntakelexhaust leak, fuel pressure, wiring,<br />

MAF sensor, H02S<br />

223 I Idle air control (IAC) valve<br />

Wiring, IAC valve<br />

224 I Engine coolant temperature (ECT) sensor Wiring, ECT sensor<br />

I<br />

Fuel trim (FT), part load - too weaklrich lntakelexhaust leak, fuel pressure, excessive fuel in<br />

engine oil, injector(s), EVAP canister purge valve,<br />

131 wiring, MAF sensor, ECT sensor, H02S<br />

1<br />

Fuel trim (FT), part load - too rich<br />

Fuel pressure high, excessive fuel in engine oil,<br />

injector(s), EVAP canister purge valve, wiring,<br />

2310 MAF sensor, ECT sensor, H02S<br />

Fuel trim (FT), idling - weaklrich<br />

lntakelexhaust leak, fuel pressure, excessive fuel in<br />

engine oil, injector(s), EVAP canister purge valve,<br />

wiring, MAF sensor, ECT sensor, H02S<br />

I<br />

234 Throttle position (TP) switch - CTP contacts<br />

TP switch adjustment, accelerator cable adjustment,<br />

wiring, TP switch<br />

241 Exhaust gas recirculation (EGR) system - insufficient<br />

flow detected<br />

242 Turbochamer (TC) wastegate regulating valve<br />

311 ( Vehicle speed sensor (VSS)<br />

31 2 1 Ignition control module (ICM) - KS signal missing Wiring, ICM<br />

314 Camshaft position (CMP) sensor - no/incorrect signal<br />

Hose leaklblockage, wiring, EGR valve, EGR control<br />

module, EGRT sensor, engine coolant thermostat<br />

Wiring, TC wastegate regulating valve<br />

Wiring, speedometer, VSS<br />

Wiring, CMP sensor

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