P0202 code: Injector Circuit/Open - Cylinder 2
P0202 means injector Circuit/Open - Cylinder 2. The code says where to look, not what failed — the fix depends on which cause your car actually has.
What P0202 means
P0202 means the engine computer detected a problem in the electrical circuit that drives the cylinder 2 fuel injector — an open circuit, a short to power or ground, or resistance outside the expected range. It's worth stressing that this is a wiring-and-electronics code, not a fuel-quality or clogged-injector code; a dirty injector still conducts electricity normally and won't trigger it. Typical causes are a connector that has worked loose or corroded, a wire rubbed through somewhere along the harness, or an injector whose internal coil winding has failed. In rare cases the driver transistor inside the engine computer is the problem. With no reliable injector pulse, cylinder 2 usually goes dead, so the paired misfire code P0302 often shows up at the same time.
P0202 symptoms
- Dead or weak cylinder 2 — the engine feels down a cylinder
- Rough, uneven idle
- Companion misfire code P0302 stored alongside
- Check-engine light, possibly flashing while the misfire is active
- Harder starting than normal
What it costs to fix P0202
Typical range: $80–$550 · about ~0.5–2 hrs of labor
| If the cause is… | Part | Labor |
|---|---|---|
| Fuel injector (single) | $50–$300 | ~0.5–2 hrs |
| Wiring / connector repair | $10–$60 | ~0.5–1.5 hrs |
The injector itself is a moderate part; labor depends almost entirely on access. Engines that hide the injectors under the intake manifold cost noticeably more to work on. These figures assume a common gasoline port or direct-injection engine — diesel injectors are a different, much more expensive category.
The price swings on which cause it turns out to be — so confirm the cause before paying. Diagnose P0202 for my exact vehicle →
How to fix P0202
Moderate — doable at home with common tools and patience
- Work out which injector is number 2
On an inline engine cylinder 2 sits beside number 1, but V-engine makers number differently: some count straight down one bank, others alternate, so cylinder 2 can be the front cylinder of the opposite bank. Check a numbering diagram before unplugging anything — testing the wrong injector wastes the whole session.
- Look over the plug and its locking clip
Injector connectors use small plastic latches or wire clips that turn brittle with engine heat and snap during removal. Check the cylinder 2 plug for a missing latch, corrosion, or a terminal that has backed out; a connector merely resting on the injector can lose contact with vibration and set this code on and off.
- Watch the driver signal with a test light
Clip a test light to battery positive, back-probe the injector 2 control wire at the connector, and crank the engine. A steady flicker means the computer is pulsing the circuit and the fault lies with the injector or its feed; no flicker points at the control wire or the driver. Never use this test on a direct-injection engine.
- Wiggle the harness with the engine running
If the fault comes and goes, idle the engine and flex the section of harness feeding cylinder 2 while watching the misfire counters or listening for a stumble. A sudden change pinpoints a cracked conductor, typically where the loom bends around a bracket or tucks under the fuel rail.
- Repair what failed the tests
Compare injector 2's resistance with its neighbours and the spec for your engine. An open or shorted winding means a new injector; a good reading with a dead control wire means a harness repair using solder and heat-shrink. A failed driver inside the engine computer is the rare final answer.
DIY or shop? The test-light check, wiggle test, and connector repair need only cheap tools and some patience, and they find most P0202 faults. Whether the injector swap is DIY depends on reach: simple on top of most inline engines, much harder when cylinder 2 lands on a bank tucked beneath the intake plenum. Direct-injection engines, engine-computer replacement, or a break buried deep in the loom are where a shop with wiring diagrams should take over.
Tools for the DIY steps: Test light · Back-probe pins · Digital multimeter · Scan tool with misfire counters · Solder and heat-shrink tubing
Not sure which step applies to your car? Get the likely cause for your exact vehicle before buying anything for P0202.
Start a case with P0202 and your car. Redline weighs these causes against what your car shows, and names the check that would settle it before you buy parts.
Can I drive with P0202?
Redline can’t determine from a symptom or code alone whether your car is safe to drive.
P0202: common questions
Where is cylinder 2 on my engine?
It depends on the make — cylinder numbering differs between manufacturers and between inline and V engines. On some V engines cylinder 2 is on the opposite bank from cylinder 1. Check a cylinder-layout diagram for your specific engine before pulling anything apart.
Could P0202 just be a clogged injector?
No — a clogged injector is a mechanical blockage, and its electrical circuit still measures normal, so it sets misfire or lean codes instead. P0202 specifically means the electrical circuit is open, shorted, or out of range, which points to the connector, the wiring, or the injector's internal coil.
Is it safe to keep driving with P0202?
A code alone can't settle that, and this isn't one to put off. The dead cylinder's unburned fuel can cook the catalytic converter — an expensive part to sacrifice over what is often a cheap wiring fix. A flashing check-engine light means stop and get it towed or repaired.
What does it cost to fix P0202?
If it's a corroded connector or a chafed wire, very little. A new injector is a moderate part cost with half an hour to two hours of labor — more on V engines where the intake must come off, and far more on diesel or high-pressure direct-injection setups.
Related trouble codes
Don’t have a scanner yet? A ~$25 Bluetooth adapter reads codes like P0202 from your phone. See our guide to the best OBD2 Bluetooth adapters. Run a repair shop? See Redline for shops.
Generic OBD-II reference. Manufacturer-specific behavior varies. Confirm with a scan tool and, for safety-related codes, a professional inspection. Cost ranges are reference ranges, not quotes.
Seeing P0202 on your car?
Every problem becomes a Case. Tell Redline what the car is doing: it shows what the evidence supports, what’s still missing, and what to check next, before you approve a repair.
“Inner pad ~1 mm. Outer pad 3 mm.”
Next: check the slide pins move freely before buying parts.