P0201 on Mercedes-Benz
Injector Circuit/Open - Cylinder 1
P0201 on Mercedes-Benz vehicles indicates injector circuit/open - cylinder 1. Au7o has documented this code across 2 Mercedes-Benz models — most commonly on GLK-Class, Sprinter. P0201 means the engine computer detected an electrical problem in the wiring or control circuit for the fuel injector on cylinder 1. The PCM pulses each injector open and back ground, and when it sees an open circuit, a short, or abnormal resistance on cylinder 1's injector circuit, it sets this code. In practice it means cylinder 1 may not be getting fuel injected properly, which can cause a misfire, rough running, or a no-start on that cylinder. It points to the injector itself or its wiring, not to a fuel-pressure problem affecting the whole engine. Typical repair costs on Mercedes-Benz range from $300 to $3,000, depending on the specific model and root cause.
Common Causes of P0201
- •Damaged or corroded injector connector or terminals at cylinder 1
- •Broken, chafed, or shorted injector wiring harness
- •Failed (open or shorted) fuel injector on cylinder 1
- •Loose or poor ground/power feed to the injector circuit
- •Blown injector fuse or relay feeding the bank
- •Failed injector driver inside the PCM/ECM
P0201 on Mercedes-Benz by Model
Mercedes-Benz GLK-Class(1 issue)
- Diesel Injector Leak and Black Death (OM651)2010-2015
The OM651 diesel injectors in the GLK develop a condition known as "Black Death" where the copper injector sealing washers fail, allowing combustion gases to escape around the injector. The escaping gases carbonize and create hard black tar deposits around the injector bore, eventually welding the injector in place and making removal extremely difficult.
Mercedes-Benz Sprinter(1 issue)
- Diesel Injector Failure and Black Death (OM651/OM654)2010-2025
Sprinter diesel injectors develop seal failures leading to the "Black Death" condition where combustion gases leak past the injector copper washers, carbonizing and creating hard tar deposits around the injector bore. This is the most common and feared Sprinter repair, as advanced cases require expensive injector extraction procedures when the carbon welds the injectors in place.
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View P0201 across all makes →Frequently Asked Questions
What does P0201 mean on Mercedes-Benz?▼
P0201 stands for "Injector Circuit/Open - Cylinder 1." P0201 means the engine computer detected an electrical problem in the wiring or control circuit for the fuel injector on cylinder 1. The PCM pulses each injector open and back ground, and when it sees an open circuit, a short, or abnormal resistance on cylinder 1's injector circuit, it sets this code. In practice it means cylinder 1 may not be getting fuel injected properly, which can cause a misfire, rough running, or a no-start on that cylinder. It points to the injector itself or its wiring, not to a fuel-pressure problem affecting the whole engine. On Mercedes-Benz specifically, this code is documented across 2 models.
What causes P0201 on Mercedes-Benz vehicles?▼
Common causes on Mercedes-Benz: Damaged or corroded injector connector or terminals at cylinder 1, Broken, chafed, or shorted injector wiring harness, Failed (open or shorted) fuel injector on cylinder 1, Loose or poor ground/power feed to the injector circuit, Blown injector fuse or relay feeding the bank. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0201 on a Mercedes-Benz?▼
Repair costs on Mercedes-Benz range from $300 to $3,000, depending on the specific model and root cause.
Which Mercedes-Benz models have P0201 documented?▼
Au7o has documented P0201 on 2 Mercedes-Benz models: GLK-Class, Sprinter.