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

2017-2021 Jeep Grand Cherokee Trouble Code P0301: Cylinder 1 Misfire Detected

If your 2017-2021 Jeep Grand Cherokee (3.6L Pentastar V6, 5.7L HEMI MDS V8, 3.0L EcoDiesel V6) is triggering code P0301, accompanied by Noticeable engine hesitation, shaking idle, and uneven exhaust pulse frequency, 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 P0301

Powertrain / Ignition

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 (Address immediately to protect catalytic converter)

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 P0301:

Documented Failure Pattern:

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

General Root Causes: Cylinder 1 spark plug electrode gap erosion, coil pack failure, injector blockage, or intake manifold runner seal leak.

Quick DIY Verification Steps

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

Acoustic Isolation: Does the engine make Noticeable engine hesitation, shaking idle, and uneven exhaust pulse frequency? Note if the frequency doubles with engine RPM or remains constant.
Targeted Physical Check: Swap cylinder 1 ignition coil with cylinder 2; rescanned code moving to P0302 confirms faulty coil.
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 P0301 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)	$40 – $60	$92 – $128
Moderate (OEM Sensor, injector, coil pack)	$64 – $112	$138 – $220
Comprehensive (Timing, manifold, internal)	$201 – $392+	$396 – $660+

*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 P0301 mean on a 2017-2021 Jeep Grand Cherokee?

Code P0301 indicates Cylinder 1 Misfire Detected. 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 P0301?

Severity Assessment: 🔴 High Risk (Address immediately to protect catalytic converter). 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 P0301 on 2017-2021 Jeep Grand Cherokee?

Drivers frequently report: Noticeable engine hesitation, shaking idle, and uneven exhaust pulse frequency. 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 P0301 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.