P1390 Jeep Code - Timing Belt Skipped One Or More Teeth
Quick Answer
The P1390 code for Jeep vehicles indicates that the timing belt has skipped one or more teeth. Common causes include Worn timing belt, Incorrectly tensioned timing belt, Faulty timing belt tensioner. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1390 Jeep indicates Timing Belt Skipped One Or More Teeth.
- Common causes
- Common causes include Worn timing belt, Incorrectly tensioned timing belt, Faulty timing belt tensioner.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P1390 Jeep Description
The P1390 code for Jeep vehicles indicates that the timing belt has skipped one or more teeth. The timing belt is a critical component that synchronizes the rotation of the crankshaft and camshaft(s) in the engine. This synchronization is crucial for the proper operation of the engine's valves, pistons, and other components. When the timing belt skips teeth, the engine's timing is thrown off, leading to poor performance, misfires, and potential damage to the engine.
Common Causes of P1390 Jeep
- Worn timing belt
- Incorrectly tensioned timing belt
- Faulty timing belt tensioner
- Damaged timing belt idler pulleys
- Improper timing belt installation
Symptoms of P1390 Jeep
- Engine misfires
- Rough idling or stalling
- Loss of power
- Engine noise or rattling
- Check Engine Light illuminated
How to Fix P1390 Jeep
- Diagnose the issue: Use a scan tool to retrieve the fault code and inspect the timing belt for any visible signs of wear or damage.
- Replace the timing belt: If the timing belt has skipped teeth, it will need to be replaced. This typically involves removing various components to access the timing belt.
- Inspect and replace tensioner and idler pulleys: Check the timing belt tensioner and idler pulleys for wear or damage and replace them if necessary.
- Realign timing marks: After installing the new timing belt, ensure that the timing marks on the crankshaft and camshaft(s) are properly aligned.
- Test drive and recheck: Start the engine and test drive the vehicle to ensure that the issue has been resolved. Recheck the timing belt alignment to confirm proper installation.
Cost to Fix P1390 Jeep
The cost of repairing a timing belt that has skipped teeth can vary depending on the make and model of the vehicle, the extent of the damage, and labor rates in your area. Typically, the cost of replacing a timing belt ranges from $500 to $1000, including parts and labor. Additional costs may apply if other components, such as the tensioner or idler pulleys, need to be replaced. It is recommended to consult with a professional mechanic for a more accurate cost estimate based on your specific vehicle.
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