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HOMESERVICE MANUALSVOLVO2004V70 L5-2.5L TURBO VIN 59 B5254T2REPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONMANUFACTURER CODE CHARTSECM CODES (ENGINE CONTROL MODULE)ECM-3420DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION
2004 Volvo V70 L5-2.5L Turbo VIN 59 B5254T2

Diagnostic Trouble Code (DTC) Information

2004 Volvo V70 L5-2.5L Turbo VIN 59 B5254T2SECTION Diagnostic Trouble Code (DTC) Information





Diagnostic trouble code (DTC) information

Condition




Diagnostic trouble code (DTC) ECM-3420 is stored if the engine speed (RPM) is over 3000 rpm, the engine coolant temperature (ECT) is above 40°C (104°F) and the signal from the rear knock sensor (KS) is too high or too low.

Substitute value
- ignition retarded for safety reasons
- reduced boost pressure

Possible source

Signal too high:
- short-circuit to supply voltage in the signal cable
- worn engine

Signal too low:
- open-circuit in signal cable
- contact resistance in terminals
- defective knock sensor (KS)
- short-circuit between knock sensor (KS) signal cables

Fault symptom[s]
- none

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.