Jeep Commander hard starting issue with persistent PCM codes P0340 and P0344, failure to accelerate on Jeep Commander

Submitted by Jim Taddei · Jun 23, 2025
Published by RepairPal

Problem overview

Some Jeep Commander owners report experiencing hard starting issues accompanied by persistent PCM codes P0340 and P0344, which indicate problems within the camshaft position sensor circuit. These issues may lead to difficulties in starting the engine and a failure to accelerate, significantly impacting vehicle performance. Owners are advised to inspect the camshaft position sensor for damage and consider its replacement if necessary. Additionally, updating the Powertrain Control Module (PCM) software is often recommended to resolve these codes and enhance performance. It's also important to check the PCM connectors for signs of coolant or corrosion that could affect functionality. In some instances, cold weather may trigger these codes, so warming up the camshaft position sensors before installation may help prevent related issues.

6 people reported this problem
3 comments
Schedule Repair

Jeep Commander vehicles with this problem

Average mileage: 68,091 miles
(40,000 - 98,455)

Search for another problem

RepairPal Car Genius

Ask our experts about your Jeep.

RepairPal Car Genius™ is a free resource for vehicle owners seeking advice on maintenance, auto repair, shop inquiries, estimates, and finding a trustworthy repair shop in your area.

 Auto Repair Expert Auto Repair Expert

Call us at 877-913-1554

Available 9am – 6pm ET Monday through Friday

Call Our Experts