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P0202 on BMW: Causes, Symptoms and Fix Cost

Quick Answer

Safe to drive (short-term)

P0202 on a BMW is set when the engine control unit sees an electrical fault in the cylinder 2 injector circuit: an open wire, a short or a coil resistance it does not expect. Cylinder 2 is the second cylinder in from the pulley end on most inline engines, and on a V engine it can sit on either bank depending on the maker. A connector or wiring fault typically costs 65-220 EUR at a workshop to fix; a petrol injector fitted costs about 100-310 EUR.

Severity
Moderate · Fuel System
Typical repair cost, all makes
€5-€650

Connect a standard OBD2 adapter (Bluetooth LE on iPhone) to your BMW and Skanyx tells you what P0202 means on that engine, whether it is safe to keep driving, and what the fix should cost. Free on iPhone and Android.

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What does P0202 mean on a BMW?

The Quick Answer above is the generic definition. What follows is the model-specific detail for the BMW models that log P0202.

BMW 3 Series

2005-2024

Direct-injection petrol engines (N20, N55, B48) use solenoid or piezo injectors with connectors that can corrode or work loose. On N47/B47 diesels the common-rail injectors are costly and need injector coding after replacement, which requires Carly, ISTA, or a workshop. Skanyx reads the generic circuit code and any misfire codes, but not the per-injector adaptation data.

What causes P0202 on a BMW?

Beyond the generic causes listed on the main P0202 page, these are the patterns noted for BMW models:

  • Corroded or loose injector connector on N20/B48 petrol

    : BMW 3 Series

  • Diesel common-rail injector failure requiring coding on N47/B47

    : BMW 3 Series

How to diagnose P0202 on a BMW with OBD2

  1. Confirm P0202 with Skanyx and note the freeze frame. A matching P0302 means cylinder 2 is actually misfiring; P0264 or P0265 narrows the fault to the control circuit being low or high
  2. Count to cylinder 2. On most inline engines it is the second cylinder from the pulley end, between cylinders 1 and 3. On a V6 or V8 it depends on the maker: engines numbered one bank first (Ford, Audi) put it on bank 1, engines that alternate sides (GM V8s, Toyota's 2GR V6) put it on bank 2
  3. Check the cylinder 2 injector plug: it sits in the middle of the rail, close to the plugs for cylinders 1 and 3, so make sure it is fully latched and was not swapped or left half-seated after earlier work
  4. Unplug the connector and measure the injector coil. Compare with the specification for your engine rather than a generic figure, because port, direct-injection and diesel injectors differ widely
  5. Back-probe the harness from the injector plug to the ECU pin for injector 2, flexing the loom as you go to catch an intermittent break
  6. Swap injector 2 with injector 1 or 3, clear the code and test again. If the code becomes P0201 or P0203, replace the injector; if P0202 stays, repair the wiring or have the ECU driver checked
  7. Direct-injection injectors are fired with a high opening voltage and piezo diesel injectors with far more, so never probe them with a test light or touch the terminals with the engine running

How much does P0202 cost to fix on a BMW? (EUR)

Estimated repair costs for P0202 in EUR, compiled across makes. Expect BMW parts and labour towards the upper end of each range.

Repair Parts Cost Labor Cost Total Estimate DIY Difficulty
Fix cylinder 2 plug or wire yourself (DIY) €5–€30 €0–€0 €5–€30 Moderate
Workshop diagnosis and repair of the cylinder 2 circuit €5–€40 €60–€180 €65–€220 Professional
Fit new cylinder 2 injector - petrol (workshop) €40–€150 €60–€160 €100–€310 Moderate
Fit new cylinder 2 injector - common-rail diesel (workshop) €150–€400 €100–€250 €250–€650 Professional

Prices estimated as of October 2026. Costs vary by region, vehicle, and shop.

These codes are often seen alongside P0202 or point to related issues, on any make:

Looking for the full P0202 reference (all makes, full diagnosis flow, complete repair cost matrix)? See the main P0202 guide

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