P1322 — Cylinder 10 Coil High-to-Low Short

What exactly does P1322 identify?

P1322 identifies a short between the positive-voltage and negative-voltage sides of the cylinder 10 ignition-coil circuit. It is a specific side-to-side short condition rather than a general engine misfire code.

Can the vehicle still be driven with P1322?

Short trips may be possible if the engine is smooth and power loss is minimal, but repair should be scheduled promptly because an inactive cylinder 10 can cause poor operation and potentially damage ignition-control components.

Does P1322 always mean the cylinder 10 coil is defective?

No. A failed cylinder 10 coil is a leading possibility, but P1322 can also result from a melted connector, chafed wiring, contamination, or a fault in the associated ignition driver or control module.

How is a shorted cylinder 10 coil confirmed?

The coil is disconnected and tested between its positive and negative terminals in both meter directions. The readings are compared with service specifications, after which wiring and connector checks help distinguish a coil failure from a harness fault.

When your scan tool pulls code P1322, it means the engine control unit has detected a fault in one of the sensor or actuator circuits. This falls under the broader category of electrical problems that the OBD2 system monitors on every vehicle sold in the United States since 1996. The control module does not set P1322 after a single glitch—it requires the same failure to occur under specific operating conditions before the check engine light illuminates. That repeatability is actually useful: it tells you the problem is real, not a one-time electrical hiccup.

The freeze frame data stored alongside P1322 is your roadmap. When that code was set, the PCM captured engine load, RPM, coolant temperature, and vehicle speed at that exact moment. Those readings show you precisely what conditions triggered the fault. Reproduce those parameters during your diagnosis and you'll see the failure every time. Without that data, you're essentially guessing which sensor or circuit to trace.

Symptoms of P1322

• The check engine light turns on and typically stays on until the fault is cleared
• Fuel economy may drop noticeably, especially if a critical sensor is affected
• The vehicle could enter limp-home mode, limiting power and speed to protect components
• The affected system may operate inconsistently or stop working entirely depending on which circuit failed

Common Causes

• An internal driver fault within the control module itself, where the circuit that controls the sensor or actuator has failed
• Wiring that has been damaged by heat, chafing, or animal interference, creating an open circuit or short to ground/battery
• A corroded or loose ground connection at the component or body ground point, starving the circuit of proper reference
• A blown fuse feeding the affected circuit—always check the fuse box before diving into wiring diagnostics
• The sensor or actuator at the end of that circuit has simply failed from wear, heat cycles, or manufacturing defect

How to Diagnose P1322

Start by connecting a quality OBD2 scanner and confirming that P1322 is present in the stored codes. Record the freeze frame information before clearing anything—that data is gold when you're trying to reproduce the failure condition.

Check for any other diagnostic trouble codes that accompanied P1322. Related codes often point to the root cause, especially if the sensor shares power, ground, or signal lines with other components. After cataloging all codes, look up technical service bulletins for your specific make, model, and year. Manufacturers publish TSBs for known faults, and some P1322 issues have factory-issued software updates or repair procedures that save hours of diagnostic time.

Perform a thorough visual inspection of the wiring harness and connectors in the affected circuit. Look for cracked insulation, green corrosion on terminals, bent pins, or evidence of wires rubbing against metal brackets. Pay special attention to areas near the engine, transmission, and wheel wells where vibration and heat cause the most damage.

Use a multimeter to check reference voltage, ground integrity, and signal continuity at the component connector. Compare your readings to factory specifications. A missing ground or unexpected resistance value tells you exactly where the circuit failed.

While monitoring live data on your scanner, gently wiggle the wiring harness and connectors. If the signal drops out or fluctuates when you move the wires, you've found an intermittent break or poor connection that needs repair.

Finally, clear the code and complete a full drive cycle that includes the exact conditions recorded in the freeze frame—same load, RPM, temperature, and speed. If P1322 returns, you have confirmed the fault is still present and your diagnosis is on the right track.

Repair Options and Costs

The repair approach depends entirely on which part of the circuit failed. Always work from the easiest and cheapest possibilities toward the expensive components.

• Wiring repair or connector replacement typically runs $80 to $250, depending on accessibility and how much harness work is involved
• If the sensor or actuator itself has failed, expect to pay $150 to $500 for the part plus labor
• Control module internal repairs or replacement generally cost $300 to $1,000, making this the most expensive scenario

Total out-of-pocket for P1322 repairs usually falls between $80 and $1,000. The wide range reflects how much variation exists in which component fails. A quick visual inspection and fuse check might reveal a $15 fuse or a loose connector you can fix in minutes. Conversely, an internal PCM driver failure requires professional module repair or replacement and pushes costs to the high end.

Can You Drive With P1322?

Most vehicles remain driveable when P1322 is stored, though you may notice reduced performance, worse gas mileage, or limited function of whatever system that circuit controls. The engine will run, and the car will move under its own power in most cases.

Treat this code as urgent if you experience stalling, failure to start, or warnings affecting your brakes or power steering. Those symptoms indicate the fault has progressed beyond an annoying sensor glitch into a safety concern. Otherwise, you can schedule repair at your convenience, but don't ignore it indefinitely—whatever caused P1322 will not fix itself, and continued operation with a faulty circuit can cascade into bigger problems.

Related OBD2 Codes

• P1300: Multi-faults - Bank 1 - With Low Side Shorts
• P1301: Multi-faults - Bank 2 - With Low Side Shorts
• P1302: Injector High Sides Shorted Together
• P1303: IDM Failure
• P1304: Cylinder Head Overtemperature Protection Active
• P1305: Boost Calibration Fault