What does DAF fault code P140F point to?

P140F is reported in this data as: EGR bypass / cooler bypass plausibility report code. It can be linked with 2339622, B368 depending on truck model, engine and live diagnostic data.

Can I order a part from fault code P140F 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 P140F: likely components, OEM numbers and symptoms.

EGR bypass / cooler bypass plausibility report code. This page groups every component report connected with P140F, 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 P140F.

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

EGR valve

2339622 · MX-13 Euro 6 EGR valve

DAF / PACCAR

Main MX-13 Euro 6 EGR valve interchange group. It combines repeated reports for 2339622 and linked replacements where symptoms are soot blocking, position errors, failed regens and derate.

Top symptoms

Power derate or limp mode
EGR valve stuck open or stuck closed in diagnostic software
Rough idle, hunting or surging at cruise

OEM numbers

2339622 1953573 1954014 1960473 2021931 2052205 2104971 2123990

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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

View full diagnostic page →

Defect symptoms

Symptoms reported with P140F

Power derate or limp mode

EGR valve stuck open or stuck closed in diagnostic software

Rough idle, hunting or surging at cruise

Black smoke when pulling away or backing under a trailer

Failed regeneration and high DPF differential pressure

Coolant loss with no visible external leak

AdBlue or NOx after-cat secondary faults from incorrect EGR rate

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

OEM numbers

OEM references to check

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

Why it happens

Likely root causes behind P140F

Carbon and soot cake the EGR valve plate, shaft and valve seat.
Condensation and oil mist form acidic sludge after the EGR cooler.
Motor gearbox wears from continuous modulation and high resistance.
Coolant leakage through the cooler or valve interface corrodes electronics and accelerates sludge build-up.
Position sensor drift causes commanded-versus-actual mismatch.
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.

Fitment

Trucks and engines that report P140F

Model	Engine	Years
XF 106	MX-13 Euro 6 12.9L	2013-2023
CF 85	MX-13 Euro 6	2013-2021
CF 430	MX-13 Euro 6	2017-2023
CF 480	MX-13 Euro 6	2017-2023
CF 530	MX-13 Euro 6	2017-2023
XG	MX-13 Euro 6	2021-2023
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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