Before replacing the starter, please follow the published diagnostics in the Service Information at 08 - Electrical / 8F - Engine Systems / Starting / Diagnosis and Testing / STANDARD STARTING SYSTEM. Updates to this procedure have been recently made and should be followed.
full bulletin at NHTSA ↗2023 Jeep Grand Wagoneer engine problems
moderate 6 complaints filed with NHTSA · avg repair $3,100 · see engine across all vehicles →
Complaints
6
Recalls
0
Avg fix
$3,100
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering engine on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
Before replacing the water pump on 3.0L SO/HO, please follow the updated WATER PUMP INSPECTION diagnostic procedure to confirm the leak persists "09 - Engine, 3.0L GMET6 / Cooling System / Engine Cooling / Diagnosis and Testing / COOLING SYSTEM LEAKS"
full bulletin at NHTSA ↗Before replacing the water pump on 3.0L SO/HO, please follow the updated WATER PUMP INSPECTION diagnostic procedure to confirm the leak persists "09 - Engine, 3.0L GMET6 / Cooling System / Engine Cooling / Diagnosis and Testing / COOLING SYSTEM LEAKS"
full bulletin at NHTSA ↗Flash: Ignition System Control Module (ISCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P2C30-00 - Ignition Coil Primary Circuit Fuse A. ● P2C31-00 - Ignition Coil Primary Circuit Fuse B. ● P0300-00 - Multiple Cylinder Misfire. ● P0301-00 - Cylinder 1 Misfire Detected. ● P0302-00 - Cylinder 2 Misfire Detected. ● P0303-00 - Cylinder 3 Misfire Detected. ● P0304-00 - Cylinder 4 Misfire Detected. ● P0305-00 - Cylinder 5 Misfire Detected. ● P0306-00 - Cylinder 6 Misfire Detected. ● P0420-00 - Catalyst System Efficiency Below Threshold Bank 1. ● P0430-00
full bulletin at NHTSA ↗Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● **P0111-00 - Intake Air Temperature Sensor 1 Circuit Range Performance Bank 1 (In Active or Stored status). ● P0071-00 - Ambient Air Temperature Sensor Performance (In Active or Stored status). ● P0072-00 - Ambient Air Temperature Sensor Circuit "A" Low (In Active or Stored status). ● P0073-00 - Ambient Air Temperature Sensor Circuit "A" High (In Active or Stored status). ● P0011-00 - Bank 1 Camshaft 1 Position Timing Over Advanced Or (In Active or Stored status). ● P2
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
What owners are reporting 4 most recent
At engine idle with vehicle parked or driving in heavy traffic, exhaust fumes are entering the passenger compartment. I am not aware of any apparent exhaust leak. The fumes seem to be entering by way of the fresh air intake. I have confirmed CO readings with 2 different detection devices. If the vehicle is moving the readings have been 3-96 ppm. If the vehicle remains stopped with engine running,…
Vehicle over heated disabling vehicle on freeway. This was a know problem with this manufacturer.
2023 Grand wagonner : Vehicle overheats while driving and completely stops in the middle of the road with no time to pull over safely. This is the second time it has happened in a year of owning it. Check engine light has been on since the first time it overheated and dealers say they don't know why.
Engine shut down on highway while doing 55 mph. Almost was in a crash with multilabel cars. Second issue Forward Collision Warning failed on a sunny morning. A semi rolled and dumped it load causing the cars in front of me to stop suddenly. The Forward collision did nothing and did not apply my brakes. I missed the car in front of mine by a couple feet.
Had engine trouble with your 2023 Jeep Grand Wagoneer?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the engine problem on the 2023 Jeep Grand Wagoneer?
It's a documented issue but not catastrophic. 6 complaints have been filed. Repairs average $3,100 and most owners catch it before it causes a breakdown.
At what mileage does the engine typically fail?
Based on the 6 complaints filed, engine issues most often appear around 11,747 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
What does it cost to fix?
Independent shops typically charge around $3,100 for engine repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to engine?
No active recalls currently cover engine issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2023/Jeep/Grand Wagoneer.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.