OBD-II trouble code
P0208: Injector Circuit/Open - Cylinder 8
SAE J2012 APR2002: injector circuit/open, cylinder 8. GRP01 gives this injector the 3 ms open or no-load monitor, and the same sheet blocks the misfire test while P0208 is set. The printed pair is one injector replacement.
Quick facts
- System
- Powertrain
- Category
- Fuel Injectors
- Severity
- Medium severity
- Drivable
- Usually safe to drive short-term
- Repair cost range
- $770 – $950 (one fuel injector replacement, parts and labor, RepairPal national average updated 3 September 2026; wiring, and an engine with no eighth injector, are outside this pair)
- DIY difficulty
- Shop recommended
Browse every code in P0200–P0299, or start from the full code library.
What does P0208 mean?
SAE J2012 APR2002 names P0208 Injector Circuit/Open - Cylinder 8. P0282 is cylinder 8 injector circuit low and P0283 is cylinder 8 injector circuit high. Circuit/Open in section 3.1 is not limited to a broken coil.
On 07_GRP01_All Engines, injector 8 control circuit fails when the output driver sees an open or no-load for 3 ms while an injection event is attempted and the engine is running. It is Type A. The same sheet's injector 4 row is 6 ms. Injector 8 is not that row.
The misfire rows on that sheet, including cylinder 8 misfire P0308, require that P0201, P0202, P0203, P0204, P0205, P0206, P0207, and P0208 are not set, along with the other codes that row lists. A stored P0208 therefore keeps that misfire test from running. Absence of P0308 on a vehicle using that sheet is not evidence that cylinder 8 is firing.
The Cobalt chart has four injectors. The Envoy chart has six. Neither prints a cylinder 8 lamp test. A resistance measurement that includes the harness cannot separate the wire from the coil. Unplug the injector for the winding, and disconnect both ends for continuity. Short to ground and short to voltage are separate measurements. With the injector unplugged, a voltage that the chart calls the open-circuit bias is not a short to power. Call it a short to power only when the disconnected-circuit result fails and the module is disconnected so the driver is not the source.
Cylinder 8 exists on the engines whose diagrams show it. The code does not place it against a firewall. Depressurize before removal. RepairPal's 3 September 2026 injector replacement removes the intake where that description applies and says the repair is not DIY.
Common causes
- A control wire that fails continuity with both ends disconnected and the ignition off
- A GRP01 3 ms open or no-load result on injector 8 during an injection event
- A control wire shorted to ground, module disconnected, injector unplugged
- A control wire shorted to voltage, distinguished from the chart's open-circuit bias
- A winding out of the resistance this chart prints, measured alone
- A missing P0308 treated as proof the cylinder is fine, on a GRP01 calibration that inhibits misfire while P0208 is set
- A module driver, after those wire tests pass
Symptoms
- P0208 stored
- P0282 or P0283 if the low and high codes are the ones stored
- No P0308 on a GRP01 calibration because the misfire enable requires P0208 to be unset
- A rough engine whose eighth injector the diagram can point to
- A four-cylinder or six-cylinder chart used on a code those charts do not define
Diagnostic steps
- 1.Confirm the diagram has cylinder 8. Stop if it does not.
- 2.Read freeze frame, then leave P0308 out of the proof if this calibration is the GRP01 sheet. That misfire test does not run while P0208 is set.
- 3.Split P0208 from P0282 and P0283 before choosing a test.
- 4.Ignition off, unplug injector 8, measure the winding against this chart's spec. No battery voltage on the pins.
- 5.Harness open: both ends off, ignition off. Short to ground: module unplugged as well. Short to voltage: key on, injector unplugged, module unplugged, and only if the reading is not the bias this chart prints for an open signal.
- 6.Do not install the Cobalt lamp between terminals A and B. That procedure has no cylinder 8.
- 7.Depressurize. If the injector is replaced, RepairPal's description removes the intake on the engines it covers, uses fire precautions, and disconnects the battery.
- 8.Verify with an injection event that no longer shows the 3 ms open or no-load result, on a GRP01 calibration.
Repair cost
$770 – $950 (one fuel injector replacement, parts and labor, RepairPal national average updated 3 September 2026; wiring, and an engine with no eighth injector, are outside this pair)
RepairPal's fuel injector replacement, updated 3 September 2026, averages $768–$953, rounded to $770–$950. Labor is $304–$446 and parts are $464–$507. The 2026 Hyundai Tucson line is $456–$604 and is outside the pair. A GRP01 wiring repair is not the injector average. Check-engine diagnosis is $125–$183 and is separate.
Estimate your repair
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Open the Repair Cost Estimator with fuel injector replacement preselected. Adjust labor rate and vehicle category to fit your situation.
DIY vs shop
Leave this one to a qualified shop. The barrier here is high-pressure fuel components, where residual pressure remains after shutdown and escaping fuel can penetrate skin. DIY attempts often produce a more expensive problem than the original code.