What does Scania fault code 4358 (SPN 520202) mean?

Q: What does Scania fault code 4358 (SPN 520202) mean?

4358 (SPN 520202) indicates: Engine "hunting" at idle; Sudden power drop; White smoke; Surging under load. Fix: LOGIC: Fuel Pressure Control Valve (IMV/MPROP) current too high or low. The EEC3 controller cannot maintain stable rail pressure. ACTION: 1. Check the 2-pin connector on the high-pressure pump. 2. Measure resistance of the solenoid (should be approx. 2-5 Ohms). 3. Check for fuel leaks at the return lines. FIX: Replace the Fuel Volume Control Valve (IMV) or repair the harness pigtail.

Scania Fault Code

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4358 (SPN 520202)

Engine "hunting" at idle; Sudden power drop; White smoke; Surging under load.

System

Not specified

Symptom

Engine "hunting" at idle; Sudden power drop; White smoke; Surging under load.

Diagnosis & fix steps

LOGIC: Fuel Pressure Control Valve (IMV/MPROP) current too high or low. The EEC3 controller cannot maintain stable rail pressure. ACTION: 1. Check the 2-pin connector on the high-pressure pump. 2. Measure resistance of the solenoid (should be approx. 2-5 Ohms). 3. Check for fuel leaks at the return lines. FIX: Replace the Fuel Volume Control Valve (IMV) or repair the harness pigtail.

Red Seal field insights

Scania V8s are sensitive to fuel quality. If this valve is sticking, check your primary filters for metal shavings; shavings indicate the high-pressure pump is "eating itself" and the valve is just the first symptom.

Same code keeps coming back?

That's a program problem, not a part problem. Book a 30-minute uptime review with Grant, a Red Seal Heavy Duty Technician.

Book an uptime review

Read before you touch anything

This is general reference information, not a repair manual. It is for trained, qualified technicians.
Fault codes, meanings and procedures vary by model, serial number and software version. Confirm the code and the procedure against the manufacturer's service manual before acting.
Follow the OEM service manual, torque specs and your site's safety procedures: lockout/tagout, block raised equipment, relieve hydraulic, fuel and air pressure, and let hot systems cool.
You use this information at your own risk. Adventure Mechanical and AM Fleet Integrity accept no liability for damage, injury, downtime or loss arising from its use.
Not affiliated with or endorsed by any manufacturer. Brand names are used only to identify the equipment a code applies to.

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