P0265 on 2009-2010 Saturn VUE: Cylinder 2 Injector Circuit High Causes and Fixes

What's Unique About the 2009-2010 Saturn VUE

For the 2009-2010 Saturn VUE with a V6 engine (3.0L or 3.6L), this code has a very specific and well-documented cause. These vehicles, built on the GM Theta platform, share engines and wiring architecture with models like the Chevrolet Equinox and Cadillac SRX. General Motors issued Technical Service Bulletin #PIP4924D, which directly applies to this vehicle and points to the fuel injector wiring harness rubbing against engine components. This known issue makes a wiring fault a much higher probability on this platform compared to a random failure of the injector itself, and a thorough harness inspection is the mandatory first diagnostic step.

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 running rough or shaking (misfire)
• Noticeable loss of power and acceleration
• Rough or unstable idle
• Reduced fuel economy
• Engine may stumble or hesitate

Most Likely Causes

1. Fuel Injector Wiring Harness Chafing (V6 Engines) 🔴 High Probability → Shop Engine Wiring Harness GM Technical Service Bulletin #PIP4924D specifically identifies this issue on 2009-2010 VUEs with V6 engines. Engine vibration causes the harness to rub against the intake plenum, valve cover bolts, fuel lines, or the cylinder head, causing a short to voltage. This is a well-documented failure on the Theta platform and related vehicles.
   How to confirm: Visually inspect the entire fuel injector wiring harness, especially where it routes near or touches metal engine components. Unclip the harness from mounting points to see all sides. Look for worn-through plastic loom and bare or damaged copper wires. A related TSB for other GM vehicles notes a specific chafe point on the water outlet bolt boss.
   Typical fix: Repair the damaged wire(s) using solder and heat-shrink tubing. Protect the repair with abrasion-resistant tape or loom and re-route the harness slightly to prevent future contact.
   Est. part cost: $5-$25
2. Faulty Cylinder 2 Fuel Injector 🔴 High Probability → Shop Fuel Injector Direct injectors on the V6 engines operate under high pressure and can fail internally. The internal coil winding can short or go open, leading to a circuit fault.
   How to confirm: If wiring is good, swap the cylinder 2 injector with another cylinder (e.g., cylinder 4). Clear codes and drive. If the code changes to P0271 (Cylinder 4 Injector Circuit High), the injector is faulty. Alternatively, measure the injector's resistance with a multimeter. For the 3.0L/3.6L V6 Direct Injection (LLT) engines, expect a high-impedance reading around 11-13 ohms. For the 2.4L port-injected engine, it's typically 11-16 ohms. Note: Some sources incorrectly state a low resistance for the LLT engine; be sure to use the high-impedance specification for this model year.
   Typical fix: Replace the cylinder 2 fuel injector. It is highly recommended to replace all injector O-rings and Teflon seals at the same time.
   Est. part cost: $60-$200
3. Damaged or Corroded Injector Connector 🟡 Medium Probability
   How to confirm: Visually inspect the electrical connector at the cylinder 2 fuel injector for bent pins, corrosion (green or white powder), or a broken locking tab. Wiggle the connector with the engine running to see if it affects the idle. Per GM TSB PIP5094, it is critical to check terminal pin fit and tension before replacing any parts.
   Typical fix: Clean the connector terminals or replace the connector pigtail if it is damaged. A Cadillac owner with a shared 3.6L V6 engine fixed a P0265 code by splicing in a new connector pigtail after finding a broken wire right at the connector.
   Est. part cost: $15-$40
4. Faulty Engine Control Module (ECM) ⚪ Low Probability → Shop Engine Control Module (ECM)
   How to confirm: This is diagnosed by exclusion. If the injector, wiring, and connector are all confirmed to be good, the ECM's internal injector driver is the likely culprit. An oscilloscope is the best tool to verify if the driver is failing to provide the ground pulse.
   Typical fix: Replace and program the Engine Control Module.
   Est. part cost: $200-$600

Rare But Worth Checking

• Contaminated Fuel System: The initial TSB provided in the prompt (PIP4924D) mentions inspecting fuel. While the primary cause is often wiring, fuel contaminated with water, diesel, or excessive ethanol can damage injector internals, leading to electrical faults. This is more likely if multiple, random injector codes are present.

Diagnosis Steps

1. Connect an OBD-II scanner and confirm P0265 is the primary code. 🎬 Watch: A quick overview of the P0265 diagnostic code. Note any other codes, especially P0302.
2. (V6 Engines) Critical Step: Following TSB #PIP4924D, perform a detailed visual inspection of the fuel injector wiring harness. Check for chafing against the intake plenum, valve cover bolts, fuel lines, and cylinder head. Pay close attention to where the harness is secured to metal brackets and specifically check for rubbing on the water outlet bolt boss.
3. If no wiring damage is visible, locate the cylinder 2 fuel injector. On the transverse V6 models, Bank 2 is the cylinder bank closer to the radiator (front of the vehicle), and cylinder 2 is the first cylinder on the driver's side of that bank. Access will likely require removing the upper intake manifold.
🎬 See this walkthrough for removing the intake and injectors.
4. Disconnect the electrical connector from the cylinder 2 injector. Inspect for corrosion, pushed-out pins, or damage. Check terminal pin tension as recommended by GM TSB PIP5094.
5. Injector Swap Test: Swap the fuel injector from cylinder 2 with one from an adjacent, accessible cylinder (e.g., cylinder 4). Reassemble, clear the codes, and run the engine.
6. If the code returns as P0265, the problem lies in the wiring or the ECM. If the code moves with the injector and becomes P0271 (for cylinder 4), the fuel injector is confirmed to be faulty.
7. (Optional) Electrical Tests: Use a multimeter to check for constant battery voltage on the control wire at the injector connector (with the key on), which would confirm a short to power. You can also check the resistance of the injector itself and compare it to a known good one (V6 DI: ~11-13 ohms, 2.4L PI: ~11-16 ohms).

Parts You'll Likely Need

• Fuel Injector (OEM #ACDelco 217-3449 (GM #12634126) for 3.0L V6; ACDelco 217-3428 (GM #12638530) for 3.6L V6) — An internal short in the injector's coil is a primary cause of a 'Circuit High' fault when wiring is not the issue.
  Trusted brands: ACDelco, Delphi, Standard Motor Products
  OEM price range: $80-$150
  Aftermarket price range: $60-$110
• Fuel Injector Connector Pigtail — If the connector itself is damaged or corroded, it must be replaced to ensure a solid electrical connection. A broken wire at the connector is a documented fix.
  Trusted brands: Dorman, ACDelco
  OEM price range: $25-$45
  Aftermarket price range: $15-$30

Related Codes That Often Appear With This One

• P0302 — This code means 'Cylinder 2 Misfire Detected.' Since P0265 indicates a problem with fueling cylinder 2, a misfire is a direct and expected symptom.
• P0202 — This is a more generic 'Injector Circuit Malfunction' for cylinder 2. It often appears with the more specific 'Circuit High' or 'Circuit Low' codes.

Technical Service Bulletins (TSBs) & Recalls

• PIP4924D: States that for a misfire with various injector codes (including P0265), the technician should carefully inspect the fuel injector wiring harness for rub-through or internal opens. This applies to the 3.0L and 3.6L V6 engines.

Platform-Specific Known Issues

• GM Technical Service Bulletin #PIP4924D specifically calls out the 2009-2010 Saturn VUE (with 3.0L/3.6L V6 engines) for having a fuel injector wiring harness that is prone to chafing and shorting out against engine components.

Mechanic-Grade Diagnostic Values

• Fuel Injector Resistance (3.0L/3.6L V6 DI Engines) — expected: ~11.0 - 13.0 Ohms. Failure: A reading significantly outside this range, OL (open), or near 0 (shorted) indicates a faulty injector.
• Fuel Injector Resistance (2.4L I4 Port Injection) — expected: 11.0 - 16.0 Ohms. Failure: A reading outside this range indicates a faulty injector.
• Injector Pulse Width (at idle on a healthy cylinder) — expected: 2 - 4 milliseconds (ms). Failure: A value of 0 ms on cylinder 2 would confirm the ECM is not commanding the injector, while an unusually high value could indicate a problem.

Scan Tool Commands That Help

• GM Tech 2 / GDS2: Fuel Injector Balance Test — To functionally test for a clogged or partially restricted injector after electrical checks are complete. The tool pulses each injector and measures the corresponding drop in fuel rail pressure. The pressure drop should be within 3 PSI across all cylinders.
• GM Tech 2 / GDS2: Cylinder Power Balance — To identify a non-contributing cylinder when a misfire is felt but not clearly isolated. The tool deactivates one injector at a time; if disabling cylinder 2 causes no change in engine RPM or feel, it confirms that cylinder was not contributing.

Wiring & Ground Locations

• ECM (V6 Engines) — Left front of the engine compartment.. Knowing the ECM location is required to test the injector circuit for continuity and shorts directly from the source.
• G101 / G107 — Located at the left front corner of the engine/engine compartment on V6 models.. These are primary engine grounds for the ECM. A loose or corroded connection at these points can cause floating voltages and erratic behavior in sensor and actuator circuits, including the fuel injectors.
• Cylinder 2 Injector ECM Pins (3.6L V6) — At the ECM connector.. The control circuit for the cylinder 2 injector uses ECM pins 52 (Dark Blue) and 53 (Dark Blue/White). This allows for precise testing of the wiring harness continuity and checking for shorts directly at the ECM.
• X110 Connector — A multi-way fuel injector harness connector for the V6 engine.. This is an intermediate connector between the ECM and the injectors. A fault here could affect multiple injectors. A service manual procedure involves checking for voltage at terminals A and E of this connector.

Model Year Variations Within This Range

• 2010: The high-performance 'Red Line' trim, which used the 3.6L V6 engine, was discontinued for the 2010 model year. The XR trim still offered the 3.6L V6, so the engine and its potential for this code remained available.