P0021 on Jeep: How to Diagnose & Fix
Intake Camshaft Position Timing - Over-Advanced or System Performance (Bank 2)
1 Jeep model · 1 documented issue · 1 critical
P0021 on Jeep by model: symptoms, diagnosis and fix
Multiple factors cause sudden engine stalling including low oil levels (2.4L), VVT issues, faulty sensors, fuel system problems, and transmission-related stalling (2019 9-speed). Stalling typically emerges after ~1,000 miles.
Common Symptoms
- Engine stalls during turns
- Sudden stalling at idle or low speed
- Misfires leading to stalling
- Engine cuts out without warning
- Difficult restart after stalling
How to Fix
Diagnosis required to identify root cause: check oil level (especially 2.4L), test MAF and throttle position sensors, inspect VVT system, check fuel pump pressure, verify transmission software updates applied.
Owner tips & cautions
- WarningFor 2.4L engines: Check oil level weekly - stalling often due to low oil
- TipDocument stalling incidents with date, mileage, conditions for warranty
Sources for this issue (1)
P0021 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0021 mean on a Jeep?
P0021 stands for "Intake Camshaft Position Timing - Over-Advanced or System Performance (Bank 2)." P0021 means the engine computer detected that the intake camshaft on bank 2 is timed too far advanced and won't return to its commanded position. Most modern engines use variable valve timing (VVT), where an oil-pressure-driven actuator rotates the camshaft to optimize power and efficiency; the PCM compares the camshaft's actual position to its target. When the cam stays over-advanced beyond an acceptable limit, this code sets. Bank 2 refers to the side of the engine that does not contain cylinder number one. You may notice rough idle, reduced performance, or lower fuel economy. On Jeep it is documented across 1 model: Cherokee.
What are the most common causes of P0021?
The most common causes of P0021 are: Dirty or low engine oil restricting the VVT system, Stuck or failed camshaft oil control valve (VVT solenoid) on bank 2, Clogged VVT solenoid screen or oil passage, Faulty camshaft position actuator / phaser, Wiring or connector fault at the VVT solenoid, Camshaft or crankshaft position sensor problems, Worn timing chain, guides, or stretched chain altering cam timing. The specific cause varies by vehicle.
How much does it cost to fix P0021 on a Jeep?
Repair costs vary widely with the root cause and Jeep model; each issue on this page carries its own estimate where one is published.
Looking for P0021 on a different make?
View P0021 across all makes →Join 600+ people using Au7o to better understand their vehicles.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.