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 MANUALSVOLVO1997850 L5-2.4L VIN 55 B5254SREPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONMANUFACTURER CODE CHARTSEFI / DTC CODES (ENGINE CONTROL SYSTEM)DTC EFI-314TROUBLE CODE CONDITIONS
1997 Volvo 850 L5-2.4L VIN 55 B5254S
Trouble Code Conditions
1997 Volvo 850 L5-2.4L VIN 55 B5254SSECTION Trouble Code Conditions
3-1-4 CAMSHAFT POSITION SENSOR, SIGNAL
Trouble Code Conditions
- If the engine control module (ECM) does not receive a signal from the camshaft position (CMP) sensor for 2.4 engine revolutions, diagnostic trouble code (DTC) EFI-314 is posted after 1 second on the next attempt to start the engine.
Substitute value(s)
- On engine start fuel injection and ignition are absent.
Possible source(s)
- Short-circuit to ground or supply voltage in signal cable.
- Open-circuit in signal cable, power cable or ground lead.
- Contact resistance in terminals.
- Defective camshaft position sensor.
Fault symptom(s)
- Engine does not start.
Other diagnostic trouble codes
- Read off other diagnostic trouble codes.
- Are diagnostic trouble codes EFI-123 and EFI-411 stored?
Yes:
^ Check common throttle position (TP) sensor, engine coolant temperature sensor and camshaft position sensor terminal # A18 on the engine control module for contact resistance, oxidation or an open-circuit.
No:
^ Proceed to test step below.
Other DTCs and Status Messages
Status message
- Select one of the following options to continue:
Alternative 1:
- Refer to: Faulty Signal. Permanent Fault.
Alternative 2:
- Refer to: Faulty Signal, Intermittent Fault.
Trouble Code Conditions
- If the engine control module (ECM) does not receive a signal from the camshaft position (CMP) sensor for 2.4 engine revolutions, diagnostic trouble code (DTC) EFI-314 is posted after 1 second on the next attempt to start the engine.
Substitute value(s)
- On engine start fuel injection and ignition are absent.
Possible source(s)
- Short-circuit to ground or supply voltage in signal cable.
- Open-circuit in signal cable, power cable or ground lead.
- Contact resistance in terminals.
- Defective camshaft position sensor.
Fault symptom(s)
- Engine does not start.
Other diagnostic trouble codes
- Read off other diagnostic trouble codes.
- Are diagnostic trouble codes EFI-123 and EFI-411 stored?
Yes:
^ Check common throttle position (TP) sensor, engine coolant temperature sensor and camshaft position sensor terminal # A18 on the engine control module for contact resistance, oxidation or an open-circuit.
No:
^ Proceed to test step below.
Other DTCs and Status Messages
Status message
- Select one of the following options to continue:
Alternative 1:
- Refer to: Faulty Signal. Permanent Fault.
Alternative 2:
- Refer to: Faulty Signal, Intermittent Fault.
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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.