P0202 on Volkswagen: How to Diagnose & Fix
Injector Circuit/Open - Cylinder 2
2 Volkswagen models · 2 documented issues · 1 critical · $150-$3,800 repair
P0202 on Volkswagen by model: symptoms, diagnosis and fix
On the first two model years of the MQB (second-generation) US Tiguan, the short T8 wiring harness that feeds the four fuel injectors develops intermittent opens/shorts at the injector connectors. The engine drops a cylinder at random, the cluster shows a 'Limit to 4000 RPM' or EPC warning, and the fault often clears and returns, which sends owners through coils, plugs, and even injectors before the harness is identified. Volkswagen issued Technical Tip 01-20-02TT (Feb 2020) telling technicians to replace the T8 harness on 2018-2019 Tiguan 2.0T (engine codes DDSA/DGUA) with injector circuit codes, and later extended warranty coverage on the harness under VWP-23-03 (10 years / 120,000 miles). This is distinct from the carbon-buildup and PCV misfires on the earlier Gen1 EA888.
Common Symptoms
- Intermittent misfire that comes and goes
- 'Limit to 4000 RPM' or EPC warning on cluster
- Rough idle, stumbling under load
- Check engine light with injector circuit codes
- Misfire moves cylinders or does not follow coil swap
How to Fix
Scan for P0201-P0204 (injector circuit) rather than chasing P030x misfire codes alone; wiggle-test the injector harness with the engine running. Replace the injector wiring harness with the updated part (06L971627AB) per VW Tech Tip 01-20-02TT. Ask the dealer to check warranty extension VWP-23-03 (10 yr / 120k mi) before paying; out of pocket the harness is an inexpensive part with 1-2 hours labor.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Fuel injector wiring harness (T8 injector sub-harness, engine wiring harness / injector connector harness)OEM06L971627ABCross-ref06L971627T (earlier OE number this harness supersedes — list, 06L971627P (earlier OE revision), Generic replacement harnesses sold on Amazon/eBay under hous$58–$90
This is the exact updated harness VW calls for in Technical Tip 01-20-02TT for 2018-2019 Tiguan 2.0T (engine codes DDSA/DGUA) with injector-circuit codes P0201-P0204 and the 'Limit to 4000 RPM'/EPC message.
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Sources for this issue (4)
- VWVortex - Injector Harness issue - Why isn't this a service bulletin?forum
- VWVortex - 18' Tiguan 'Limit to 4000RPM error' injector harness replaced under warranty, bulletin 01-20-02TTforum
- VWVortex - Random cylinder misfires, can't seem to solve it (VW Tiguan 2.0L TSI)forum
- P0203 on 2018-2022 VW Tiguan 2.0T: Injector Circuit Malfunctionarticle
The TDI common-rail injectors on the Caddy are a recognised weak point and can fail with little or no warning. When one fails, owners report sputtering, rough running and limp mode. VW workshops generally insist on replacing all injectors together, so the OEM repair runs into the thousands. Frequent short journeys and poor-quality (supermarket) diesel are cited contributors.
Common Symptoms
- Sputtering / misfire
- Reduced power / limp mode
- Rough idle
- Hard starting
- Excessive smoke
How to Fix
Diagnose with live data / injector return-flow ('back-leak') test to identify the failing injector(s). Replace the affected injector(s) — though a full set is often recommended — and have them coded to the ECU. Use good-quality diesel and take regular longer runs to reduce fouling.
Sources for this issue (2)
P0202 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0202 mean on a Volkswagen?
P0202 stands for "Injector Circuit/Open - Cylinder 2." This code means the Engine Control Module detected an electrical problem (open circuit or out-of-range resistance) in the fuel injector control circuit for cylinder 2. The ECM switches each injector on and off through this circuit, and it monitors the circuit to confirm the injector is responding. P0202 indicates the computer isn't getting the expected electrical feedback for that specific injector, so cylinder 2 may not be fueling correctly. This commonly causes a misfire, rough running, and reduced power on that cylinder. On Volkswagen it is documented across 2 models: Tiguan, Caddy.
What are the most common causes of P0202?
The most common causes of P0202 are: Damaged or corroded injector connector at cylinder 2, Open or shorted wiring in the injector control circuit, Failed (electrically open) fuel injector on cylinder 2, Loose or backed-out connector pin, Poor ground or power feed to the injector, Faulty injector driver inside the ECM/PCM, Chafed harness causing intermittent open. The specific cause varies by vehicle.
How much does it cost to fix P0202 on a Volkswagen?
Published repair estimates on Volkswagen range from $150 to $3,800 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for P0202 on a different make?
View P0202 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.