What does DAF fault code P1026 point to?

P1026 is reported in this data as: BPV actuator tracking or control issue in report data. It can be linked with 2104977 depending on truck model, engine and live diagnostic data.

Can I order a part from fault code P1026 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 P1026: likely components, OEM numbers and symptoms.

BPV actuator tracking or control issue in report data. This page groups every component report connected with P1026, 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 P1026.

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

Back pressure valve

2104977 · BPV valve 2104977

DAF

MX-13 Euro 6 BPV valve group from the repeated reports. Searchers usually need to match an OE number and understand weak engine-brake, chuffing exhaust and derate symptoms.

Top symptoms

Engine brake suddenly weak or completely dead on descents
Slow turbo spool and flat take-off after throttle lift
Harsh barking or chuffing from the exhaust when braking with engine brake

OEM numbers

2104977 2128867 2187597 2256380 2426255 2459939

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Defect symptoms

Symptoms reported with P1026

Engine brake suddenly weak or completely dead on descents

Slow turbo spool and flat take-off after throttle lift

Harsh barking or chuffing from the exhaust when braking with engine brake

Intermittent derate with heavy trailer and warm engine

Fuel economy worsens on stop-start or hilly routes

OEM numbers

OEM references to check

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

2104977 2128867 2187597 2256380 2426255 2459939

Why it happens

Likely root causes behind P1026

Butterfly shaft carbon-binds in the exhaust stream.
Actuator gearbox strips or develops position-sensor drift.
Exhaust-pressure control becomes erratic once the flap starts sticking.
Thermal cycling creates intermittent faults when the valve is hot.

Fitment

Trucks and engines that report P1026

Model	Engine	Years
XF 106	MX-13 Euro 6	2013-2023

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