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 MANUALSVOLVO1993850 L5-2.4L VIN 55 B5254SREPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONDIAGNOSTIC TROUBLE CODE DESCRIPTIONSMANUFACTURER CODE CHARTSENGINE CONTROL SYSTEMDETAILED DTC DESCRIPTIONSFUEL INJECTION SYSTEMDTC 1-3-1 ENGINE SPEED SIGNAL FROM IGNITION CONTROL MODULE
1993 Volvo 850 L5-2.4L VIN 55 B5254S
DTC 1-3-1 Engine Speed Signal From Ignition Control Module
1993 Volvo 850 L5-2.4L VIN 55 B5254SSECTION DTC 1-3-1 Engine Speed Signal From Ignition Control Module
1-3-1 ENGINE SPEED SIGNAL FROM IGNITION CONTROL MODULE
Condition(s) for DTC
^ The Ignition Control Module (ICM) transmits speed signals to the Multiport Fuel Injection (MFI) module through the knock enrichment and speed circuits simultaneously. The DTC is recorded if an RPM signal is absent in the speed circuit but not in the knock enrichment circuit.
Substitute value
^ None.
Fault source(s)
^ Open-circuit in signal lead.
^ Signal lead short-circuited to ground or supply.
^ Faulty ICM.
Fault symptom(s)
^ Engine cannot be started.
^ Engine stops when running.
Condition(s) for DTC
^ The Ignition Control Module (ICM) transmits speed signals to the Multiport Fuel Injection (MFI) module through the knock enrichment and speed circuits simultaneously. The DTC is recorded if an RPM signal is absent in the speed circuit but not in the knock enrichment circuit.
Substitute value
^ None.
Fault source(s)
^ Open-circuit in signal lead.
^ Signal lead short-circuited to ground or supply.
^ Faulty ICM.
Fault symptom(s)
^ Engine cannot be started.
^ Engine stops when running.
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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.