Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSVOLVO2004S80 L6-2.9L TURBO VIN 91 B6294TREPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONMANUFACTURER CODE CHARTSECM CODES (ENGINE CONTROL MODULE)ECM-1200DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION
2004 Volvo S80 L6-2.9L Turbo VIN 91 B6294T
Diagnostic Trouble Code (DTC) Information
2004 Volvo S80 L6-2.9L Turbo VIN 91 B6294TSECTION Diagnostic Trouble Code (DTC) Information
Diagnostic trouble code (DTC) information ECM-1200
Condition
Diagnostic trouble code (DTC) ECM-1200 is stored if the engine has been running for 3 minutes and been idling for at least 60 seconds and the control module receives a signal from the intake air temperature sensor (integrated in the mass air flow (MAF) sensor) corresponding to a temperature lower than -29 °C or higher than +129 °C The diagnostic trouble code (DTC) is also stored if the signal is not plausible for the intake air temperature sensor for a certain period of time.
Substitute value
+20 °C.
Three-way catalytic converter (TWC) preheating and idle air trim diagnostics are disabled.
Possible source
Signal too high:
- Short-circuit to ground in the signal cable
- Defective intake air temperature (IAT) sensor.
Signal too low:
- Contact resistance or oxidation in the terminals
- Open-circuit in the signal cable
- Open-circuit in the signal ground cable
- Short-circuit to supply voltage in the signal cable
- Defective intake air temperature (IAT) sensor.
Faulty signal:
- Contact resistance or oxidation in the terminals
- Defective intake air temperature (IAT) sensor.
Fault symptom[s]
- Malfunction indicator lamp (MIL) lit
- Poor performance.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.