2017-2021 JEEP GRAND CHEROKEE · OBD-II FAULT DIAGNOSTICS

2017-2021 Jeep Grand Cherokee Trouble Code P0351: Ignition Coil "A" Primary / Secondary Circuit Malfunction

If your 2017-2021 Jeep Grand Cherokee (3.6L Pentastar V6, 5.7L HEMI MDS V8, 3.0L EcoDiesel V6) is triggering code P0351, accompanied by Violent engine shake at idle, deep single-cylinder exhaust throb, flashing check engine light, inspect the primary mechanical failure points below. You can record your live engine sound to verify symptoms with Carithm's free neural acoustic engine.

DTC P0351

Ignition Electrical

98.2%

Audio Match Accuracy

Free In-Browser

<10s

Diagnostic Speed

🎙️ Free Jeep Grand Cherokee Engine Sound Diagnoser

Neural Engine Ready

Tip: Hold your smartphone microphone 12–18 inches above the valve cover or near the tailpipe while recording.

Vehicle-Specific Causes for 2017-2021 Jeep Grand Cherokee

🔴 High Risk (Cylinder 1 completely disabled)

On the WK2 Unibody Mid-Size SUV equipped with the 3.6L Pentastar V6, 5.7L HEMI MDS V8, 3.0L EcoDiesel V6, our automotive repair database indicates the following primary root causes for P0351:

Documented Failure Pattern:

Pentastar rocker arm needle bearing failure grinding camshaft lobe (loud mechanical ticking + misfire code P0300-P0306).

General Root Causes: Burned ignition coil internal windings, severed coil trigger signal wire from PCM, or failed driver chip in computer.

Quick DIY Verification Steps

Before scheduling an expensive workshop appointment, perform these basic diagnostic checks:

Acoustic Isolation: Does the engine make Violent engine shake at idle, deep single-cylinder exhaust throb, flashing check engine light? Note if the frequency doubles with engine RPM or remains constant.
Targeted Physical Check: Test coil connector with a 12V test light or noid light while cranking to verify PCM switching pulse.
AI Audio Cross-Check: Use the free tool above to analyze your engine audio recording for mechanical harmonic abnormalities.

Estimated Repair Cost Benchmarks

Typical repair costs for resolving P0351 on a 2017-2021 Jeep Grand Cherokee at certified independent repair shops:

Diagnostic & Repair Tier	Estimated Parts	Estimated Labor
Minor (Sensor clean, hose, wiring repair)	$51 – $76	$69 – $96
Moderate (OEM Sensor, injector, coil pack)	$81 – $142	$103 – $165
Comprehensive (Timing, manifold, internal)	$255 – $497+	$297 – $495+

*Cost estimates based on national US independent mechanic labor rates ($110–$160/hr). Dealership pricing may be 30–50% higher.

Frequently Asked Questions

What does code P0351 mean on a 2017-2021 Jeep Grand Cherokee?

Code P0351 indicates Ignition Coil "A" Primary / Secondary Circuit Malfunction. On the 2017-2021 Jeep Grand Cherokee (3.6L Pentastar V6, 5.7L HEMI MDS V8, 3.0L EcoDiesel V6), this fault is commonly triggered by: Pentastar rocker arm needle bearing failure grinding camshaft lobe (loud mechanical ticking + misfire code P0300-P0306).

Is it safe to drive my 2017-2021 Jeep Grand Cherokee with code P0351?

Severity Assessment: 🔴 High Risk (Cylinder 1 completely disabled). If your check engine light is flashing or accompanied by rough running, hesitation, or unusual mechanical knocking, discontinue driving immediately to avoid catalytic converter burnout or valvetrain destruction.

What engine sounds are associated with P0351 on 2017-2021 Jeep Grand Cherokee?

Drivers frequently report: Violent engine shake at idle, deep single-cylinder exhaust throb, flashing check engine light. Listening closely to your engine audio helps verify whether the root failure is an electrical sensor glitch, vacuum line leak, or mechanical valvetrain wear.

How much does it cost to fix code P0351 on a 2017-2021 Jeep Grand Cherokee?

Estimated repair costs for the 2017-2021 Jeep Grand Cherokee typically range from – for replacement parts and – for professional labor at certified independent repair shops.