Nissan 1.5 dCi Loss of Power

Loss of power on the 1.5 dCi (shared Nissan/Renault/Dacia engine) is usually a turbo problem caused by oil starvation, a faulty fuel injector, or EGR carbon. The turbo oil-feed pipe must always be replaced with any turbo work on these — non-negotiable.

Loss of power on the 1.5 dCi (shared Nissan/Renault/Dacia engine) is usually a turbo problem caused by oil starvation, a faulty fuel injector, or EGR carbon. The turbo oil-feed pipe must always be replaced with any turbo work on these — non-negotiable. Most often seen on the 1.5 dCi K9K (Qashqai, Juke, Note, Micra, Renault Clio/Megane).

Why this happens on a Nissan

The 1.5 dCi K9K turbo is starved of oil by a known issue with the banjo bolt strainer clogging up. As the strainer blocks, oil flow to the turbo bearing drops, the bearing wears out and the turbo fails — typically with limp-mode loss of power and P0299 stored. The same engine uses Denso injectors that suffer flow rate drift in earlier variants, causing rough running and per-cylinder fuel correction codes. EGR carbon is the third typical cause.

Affected models

• Qashqai 1.5 dCi (J10, J11)
• Juke 1.5 dCi
• Note 1.5 dCi
• Micra K12/K13 1.5 dCi
• Renault Clio/Megane 1.5 dCi (shared engine)
• Dacia Duster/Sandero 1.5 dCi

Most likely causes, in order

• Turbo failure from oil starvation (banjo strainer blocked) (very common) — Turbo replacement + MANDATORY new oil feed pipe + new banjo strainer. Fitting a turbo without the pipe = new turbo destroyed in 30,000 miles.. Typical UK cost £700–£1800.
• Failed fuel injector (Denso drift) (common) — Flow-bench test all 4 — replace as a set if any are out of spec. Always reseal copper washers.. Typical UK cost £320–£1200.
• Carbon-blocked EGR valve (common) — Strip and clean EGR + intake manifold. Standard at 60,000+ miles.. Typical UK cost £180–£450.
• Split charge pipe / intercooler hose (common) — Smoke-test reveals it.. Typical UK cost £30–£180.
• Blocked DPF (post-2010 variants) (common) — Force regen → ultrasonic clean → replace as last resort.. Typical UK cost £180–£950.

How we diagnose it

1. Scan for codes — P0299, P132B, per-cylinder injector codes, P0401.
2. Smoke-test boost system before any turbo work.
3. Inspect turbo oil feed pipe condition — replace as standard practice.
4. Confirm oil change history — 5,000 mile/12 month intervals are the maximum on these.
5. Live data: per-cylinder fuel correction. Outliers = failing injector.
6. EGR inspection — heavy carbon means strip and clean.

Is it safe to drive?

Limp mode driving only — get diagnosed before any long journey. Urgency: medium.

Bob's workshop tip

Used 1.5 dCi turbos are cheap on eBay but rarely worth fitting — the failure rate of secondhand units is sky-high. Pay £350–£500 for a quality reman with new core, fit the new oil feed pipe and banjo strainer at the same time, and you'll get reliable service. Skip the pipe and you'll be back in the workshop within 2 years.

Fault codes worth scanning for

• P0299
• P132B
• P0401
• P244A
• P0301
• P0302
• P0303
• P0304