P0206 on 2009-2014 Chevrolet Traverse: Injector Circuit Malfunction Causes and Fixes

What's Unique About the 2009-2014 Chevrolet TRAVERSE

For the 2009-2014 Traverse and its platform-mates (GMC Acadia, Buick Enclave) with the 3.6L V6 engine, this code is frequently linked to a specific, documented problem. General Motors issued Technical Service Bulletin (TSB) #PIP4924D which highlights that the fuel injector wiring harness is prone to rubbing through (chafing) against parts of the engine. Forum users have repeatedly identified the primary culprit: a sharp edge on the steel fuel line bracket located near the cylinder 6 injector. This known vulnerability makes a wiring issue a very high-probability cause, often more likely than the fuel injector itself failing.

Diagnostic Flowchart

Tap your situation to follow the diagnostic path that matches what you're seeing on this vehicle.

Symptoms You May Notice

• Check Engine Light is on
• Engine misfire, felt as shaking, sputtering, or rough idling.
• Reduced engine power and sluggish acceleration.
• Poor fuel economy.
• Engine may hesitate or stumble when pressing the gas pedal.
• In some cases, the engine may be hard to start or stall.
• A flashing Check Engine Light may occur during heavy acceleration, indicating a severe misfire.

Most Likely Causes

1. Fuel Injector Wiring Harness Chafing (Open/Short) 🔴 High Probability → Shop Engine Wiring Harness As documented in GM TSB #PIP4924D, the harness routing makes it susceptible to rubbing. Owners on forums consistently find the wire for injector #6 chafed through on the sharp edge of a metal fuel line bracket right next to the injector connector.
   How to confirm: Visually inspect the wiring harness leading to the cylinder 6 injector. Unclip the harness from the fuel line bracket and carefully examine the underside for worn insulation or exposed copper wire. A "wiggle test" (wiggling the harness near the injector while the engine is idling) may cause the misfire to appear or disappear, confirming a wiring fault.
   Typical fix: Repair the damaged section of wire with a quality butt connector and heat shrink tubing. If damage is near the connector, replace the connector pigtail. After repair, wrap the harness in protective conduit or tape and secure it away from the sharp bracket edge to prevent recurrence.
   Est. part cost: $15-$150
2. Failed Fuel Injector (Cylinder 6) 🟡 Medium Probability → Shop Fuel Injector
   How to confirm: After ruling out wiring, test the injector. Swap the cylinder 6 injector with an adjacent one (e.g., cylinder 4). Clear the codes and run the engine. If the code changes to P0204, the injector is faulty. Alternatively, test the injector's internal resistance with a multimeter; it should be within 1.5-2.5 ohms for these SIDI engines. An open circuit (infinite resistance) or short (near-zero resistance) indicates a bad injector.
   Typical fix: Replace the faulty fuel injector. It is often recommended to replace all injectors on that bank (Bank 2), or all six, if they are high-mileage. 🎬 Watch this walkthrough for replacing fuel injectors on a GM 3.6L
   Est. part cost: $50-$120
3. Damaged or Corroded Injector Connector ⚪ Low Probability
   How to confirm: Unplug the connector from the cylinder 6 injector and inspect the terminals for green or white corrosion, bent pins, or a loose fit. Ensure the locking tab is intact and that the terminals haven't backed out of the connector housing.
   Typical fix: Clean the terminals with electrical contact cleaner. If the connector is damaged, replace it with a new pigtail connector.
   Est. part cost: $10-$25

Rare But Worth Checking

• Faulty Powertrain Control Module (PCM): → Shop Engine Control Module (ECM) This is the least likely cause. The PCM's internal injector driver can fail, but all other possibilities (wiring, injector) must be exhaustively ruled out before condemning the PCM.

Diagnosis Steps

1. Retrieve all stored trouble codes with an OBD-II scanner.
2. Locate cylinder 6. On the Traverse 3.6L V6, it is the rear-most cylinder on the driver's side (Bank 2, closest to the firewall).
3. Perform a thorough visual inspection of the fuel injector wiring harness for any signs of chafing, melting, or damage, as detailed in TSB #PIP4924D. Pay extremely close attention to the point where the harness is clipped to a metal fuel line bracket near the injector.
4. Inspect the electrical connector at the cylinder 6 injector for corrosion or damage.
5. Use a noid light to test for a signal at the injector connector. Plug the noid light into the connector; it should flash when the engine is cranked or running. If it doesn't flash, there is a wiring or PCM issue. If it stays on constantly, there is a short to ground.
🎬 See how to check for injector pulse using a noid light
6. If the noid light flashes correctly, the problem is likely the injector itself. Test the injector's resistance with a multimeter. It should read between 1.5-2.5 ohms for these direct injection engines. Compare the reading to a known good injector.
7. If the noid light test fails, check for 12V power on one wire of the connector with the key on. If power is missing, trace the power supply circuit. If power is present but the noid light doesn't flash, trace the control wire (ground pulse from PCM) back to the PCM for an open or short.
8. As a final confirmation for a bad injector, swap the cylinder 6 injector with another cylinder's injector (e.g., cylinder 4) and see if the fault code follows the injector (changes to P0204).

Parts You'll Likely Need

• Fuel Injector Wiring Harness Repair Kit/Pigtail (OEM #ACDelco PT2183 (Connector)) — Due to the high probability of a chafed harness as per TSB #PIP4924D and extensive forum reports, repairing the wiring is a very common fix.
  Trusted brands: ACDelco, Dorman (645-207)
  OEM price range: $30-$60
  Aftermarket price range: $15-$40
• Fuel Injector (OEM #12638530 (Superseded by 12669384)) — If the injector itself has failed electrically (open or shorted coil), it will need to be replaced.
  Trusted brands: ACDelco, Bosch, Standard Motor Products
  OEM price range: $80-$120
  Aftermarket price range: $40-$70

Related Codes That Often Appear With This One

• P0306 — P0306 means "Cylinder 6 Misfire Detected." Since P0206 indicates a problem with fuel delivery to cylinder 6, a misfire is the direct and expected result.
• P0201, P0202, P0203, P0204, P0205 — If multiple injector circuit codes are present, it strongly points to a widespread wiring harness issue (like damage near a main connector) or a problem with the PCM's power supply or ground, rather than multiple individual injectors failing at once.

Technical Service Bulletins (TSBs) & Recalls

• PIP4924D: States that for a Service Engine Soon lamp with misfires and various injector codes (including P0206), technicians should carefully inspect the fuel injector wiring harness for rubbing through or internal wire opens at several common locations, including the intake plenum, valve cover bolts, and fuel lines.

Platform-Specific Known Issues

• GM Technical Service Bulletin #PIP4924D explicitly identifies that the fuel injector wiring harness may rub through against engine components, causing an open or short circuit that triggers codes like P0206.
• The most commonly reported failure point is where the injector harness for cylinder 6 is clipped to a sharp metal fuel line bracket. Over time, vibrations cause the bracket to cut through the wire's insulation, leading to a short or open circuit.

Mechanic-Grade Diagnostic Values

• Fuel Injector Coil Resistance — expected: 1.5 - 2.5 Ohms. Failure: A reading of 0 ohms (short) or infinite/OL (open) indicates a failed injector. This value is for the SIDI injectors in the LLT/LFX engines.
• Injector Power Supply Voltage (Key On, Engine Off) — expected: ~12.6V (Battery Voltage). Failure: Low or no voltage on the power feed wire to the injector connector points to an open in the power supply circuit, which may be shared with other injectors on the same bank.
• Injector Control Circuit Continuity — expected: < 0.5 Ohms. Failure: High resistance when measuring between the injector connector control pin and the corresponding ECM pin indicates a break or corrosion in the wiring harness.
• Scan Tool Fuel Injector Balance Test — expected: Pressure drop should be consistent across all cylinders, typically within 1.5 PSI of each other.. Failure: If disabling cylinder 6 results in no RPM drop or a significantly different pressure drop compared to other cylinders, it confirms a fault in that cylinder's fuel delivery.

Scan Tool Commands That Help

• GM GDS2 / High-End Aftermarket: Fuel Injector Balance Test / Cylinder Power Balance — This command systematically disables each injector and measures the corresponding drop in RPM or fuel rail pressure. For P0206, commanding cylinder 6 OFF should produce no change in engine operation, confirming it was not contributing. This helps differentiate a circuit/injector fault from other issues after a noid light test.
• GM GDS2 / High-End Aftermarket: Injector Circuit Status — In the live data stream, the ECM will often display a status for each injector circuit (e.g., 'OK', 'Open', 'Short to Ground'). This can provide immediate confirmation of the electrical fault type the ECM is detecting.

Wiring & Ground Locations

• Cylinder 6 Injector Control Pin — On the E39 ECM used with the LLT engine, the control wire for the cylinder 6 injector is typically located at Pin 4 of the X1 connector.. This is the specific pin at the ECM to test for continuity back to the injector connector. A break in this wire is a direct cause of P0206.
• G105 / G106 — These are primary engine grounds located on the engine block, often on the front or side of the block near the cylinder heads.. The ECM and its injector drivers rely on a solid ground reference. A loose or corroded G105 or G106 ground can cause erratic voltage and current, potentially leading to false injector circuit codes for an entire bank of cylinders.
• Injector Power Feed Wire — This wire, often Pink/Black on GM harnesses, provides battery voltage to the bank of injectors that includes cylinder 6.. A fault in this wire before it splices to the individual injectors would cause codes for multiple cylinders (P0202, P0204, P0206), not just P0206 alone.

Real Owner Repair Stories

• traverseforum.com user (2011 Chevrolet Traverse) — Check engine light with codes P0206 and P0306, rough running.
  ❌ Tried (didn't work) Replaced the fuel injector for cylinder 6.
  ✅ What actually fixed it Found a broken wire right at the injector connector. The wire's insulation was intact, so it passed a visual inspection, but a continuity test revealed the internal break. Repairing the wire and securing the connector resolved the codes.
• acadiaforum.net user (GMC Acadia (platform mate)) — Misfire and P0206 code.
  ❌ Tried (didn't work) Initial visual inspection of harness showed nothing.
  ✅ What actually fixed it After unclipping the harness from the metal fuel line bracket near cylinder 6, the user found the wire's insulation was rubbed completely through on the underside, causing a short. The fix was to repair the wire and wrap the harness section in a piece of rubber hose before re-securing it away from the sharp bracket edge.

OEM Part Supersession History

• 12638530, 12632255, 12611545 → 12669384 — Standard part evolution for improved reliability or manufacturing process.
  Heads up: These part numbers are for the SIDI (Direct Injection) LLT/LFX engines. They are not compatible with older PFI (Port Fuel Injection) engines. While aftermarket parts exist, it is recommended to replace injectors as a full set to ensure consistent flow rates.

Model Year Variations Within This Range

• 2009-2012 (LLT) vs 2013-2014 (LFX): The 2009-2012 models use the 3.6L LLT engine with a Bosch ECM. The 2013-2014 models use the updated 3.6L LFX engine, which features a composite intake manifold, integrated exhaust manifolds, and a Delphi ECM. While the P0206 fault is common to both, the specific ECM pinouts for diagnosis will differ between the Bosch and Delphi units.