What does DAF fault code P0243 point to?

P0243 is reported in this data as: Bypass / wastegate solenoid control circuit. It can be linked with B368 depending on truck model, engine and live diagnostic data.

Can I order a part from fault code P0243 only?

Use the fault code to narrow the diagnosis, then verify the installed OEM number, VIN, connector, actuator type and part photos before ordering or quoting.

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Fault-code lookup

DAF fault code P0243: likely components, OEM numbers and symptoms.

Bypass / wastegate solenoid control circuit. This page groups every component report connected with P0243, so a mechanic can move from the error code to the relevant OEM numbers, defect symptoms and fitment checks.

A fault code alone is not a parts order. Confirm with live data, VIN, installed OEM number, connector and part photos before quoting or fitting.

Likely components

Component families linked with P0243.

The same code can appear with different root causes. Use the OEM number and symptom pattern to choose the right branch.

Fuel / brake / bypass valve

B368 · B368 bypass valve

DAF / PACCAR

B368 bypass valve data is reported in several ways: fuel bypass, wastegate/bypass valve and EGR cooler bypass actuator. The lookup page should therefore make the ambiguity visible and route users by fault code and symptom.

Top symptoms

Reduced motor power and lazy spool-up
Truck smokes more on hard acceleration
Boost comes and goes instead of building cleanly

OEM numbers

B368 1693005 1740032 1740033

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Defect symptoms

Symptoms reported with P0243

Reduced motor power and lazy spool-up

Truck smokes more on hard acceleration

Boost comes and goes instead of building cleanly

Cold-start warm-up takes too long

Coolant temperature slow to rise

Engine protection during DPF regeneration attempt

OEM numbers

OEM references to check

Use these links when the workshop note only contains an OE number instead of the exact part family.

B368 1693005 1740032 1740033

Why it happens

Likely root causes behind P0243

Thermal degradation of solenoid coil insulation causing short to ground or supply.
Bypass flap seizes from soot, condensate corrosion or rod corrosion.
Motor gear-train wear on EGR cooler bypass operation.
Wiring short to ECU output in the bypass actuator circuit.

Fitment

Trucks and engines that report P0243

Model	Engine	Years
XF 105	MX-13 Euro 4/5	2006-2013
CF 85	MX-13 Euro 4/5	2006-2013
XF 106	MX-11 / MX-13 Euro 6	2013-2023
CF 480 / CF 530	MX-13 Euro 6	2017-2023

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