P0012 on Jeep: How to Diagnose & Fix
Intake Camshaft Position Timing - Over-Retarded (Bank 1)
2 Jeep models · 2 documented issues · 1 critical · $800-$2,500 repair
P0012 on Jeep by model: symptoms, diagnosis and fix
Several factors can cause sudden engine stalling, including low oil level (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 (2)
The water pump on the 3.6L Pentastar V6 can fail, causing coolant leaks and overheating. The pump is mounted on the front of the engine and driven by the accessory (serpentine) belt. Failure often occurs between 80,000-120,000 miles.
Common Symptoms
- Coolant leak
- Overheating engine
- Low coolant warning
- White residue on engine
- Sweet coolant smell
How to Fix
Replace water pump when symptoms appear. Replace thermostat at same time. Ensure proper cooling system bleeding after repair.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Crown 5184498AI external water pump for early WK2 3.6LOEMCrown 5184498AI
Early-branch pump replacement after a confirmed external water-pump failure Fitment/availability: The exact page identifies 5184498AI for 2011-2015 WK2 3.6L applications. Confirm VIN, build and current OE supersession; do not infer fit f…
- Genuine Mopar 68311108AF external water pump for later WK2 3.6LOEMMopar 68311108AF
Later-branch pump replacement after a confirmed external water-pump failure Fitment/availability: The live catalog covers 2016-2025 Grand Cherokee 3.6L applications. Confirm VIN, ESS equipment/build and current supersession before purcha…
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
Owner tips & cautions
- TipReplace water pump when symptoms appear or preventatively during timing chain service.
- TipGet a proper diagnosis before replacing parts - similar symptoms can have different causes
- TipSearch Jeep Grand Cherokee forums and owner groups for real-world experiences and DIY guides
- TipGet multiple quotes from independent mechanics - dealer prices can be 2-3x higher for the same repair
Sources for this issue (2)
P0012 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 P0012 mean on a Jeep?
P0012 stands for "Intake Camshaft Position Timing - Over-Retarded (Bank 1)." This code means the intake camshaft timing on Bank 1 is more retarded than the computer commanded — the variable valve timing system isn't reaching its target position. The computer controls camshaft timing through an oil-fed actuator (cam phaser) and a control solenoid; when actual timing lags the desired setting, this code sets. It is commonly caused by oil flow problems (low, dirty, or wrong oil), a stuck solenoid, or a worn cam phaser. Symptoms can include rough idle, reduced power, poor fuel economy, and sometimes rattling on startup. On Jeep it is documented across 2 models: Cherokee, Grand Cherokee.
What are the most common causes of P0012?
The most common causes of P0012 are: Low, dirty, or incorrect-viscosity engine oil, Faulty or stuck intake camshaft (VVT) oil control solenoid, Worn or stuck camshaft phaser/actuator, Clogged solenoid screen or oil passages, Wiring or connector problems at the solenoid, Timing chain wear or stretch affecting cam timing, Faulty camshaft position sensor. The specific cause varies by vehicle.
How much does it cost to fix P0012 on a Jeep?
Published repair estimates on Jeep range from $800 to $2,500 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.