P0016 on Jeep: How to Diagnose & Fix
Crankshaft/Camshaft Position Correlation - Bank 1 Sensor A
2 Jeep models · 2 documented issues · 1 critical · $350-$2,500 repair
P0016 on Jeep by model: symptoms, diagnosis and fix
The water pump on the 3.6L Pentastar V6 can fail, causing coolant leaks and overheating. The pump is internal and driven by the timing chain, making replacement labor-intensive. 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 or preventatively during timing chain service. Replace thermostat at same time. Consider replacing timing chain tensioners and guides if high mileage. 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
Late-TJ 4.0L Wranglers are well known for Oil Pump Drive Assembly (OPDA) failures, often described by owners as the 'screaming monkey' chirp or squeal from the engine bay. The OPDA can bind or wear internally, which may damage the camshaft gear and affect oil pump drive timing. If ignored, the issue can escalate from noise and check-engine lights to expensive internal engine repair.
Common Symptoms
- Chirping or squealing from engine bay
- Check engine light
- Rough running
- Intermittent misfire-like behavior
- Metallic wear on OPDA gear
- Engine timing sync faults
How to Fix
Diagnosis involves listening for chirping near the OPDA, checking shaft play, inspecting the drive gear wear pattern, and verifying cam/crank sync if a fault code is present. The usual repair is replacing the OPDA with an updated unit and inspecting the cam gear for abnormal wear before reinstalling. Many owners also lubricate the replacement gear and monitor for recurring noise after installation.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Crown Automotive 53010624AC updated OPDA assemblyOEMCrown 53010624AC
Replace a confirmed noisy, binding or worn OPDA with the revised-lubrication assembly Fitment/availability: 2005-2006 Wrangler TJ/Unlimited 4.0L; inspect the mating cam gear and index the engine before removal.
- Crown Automotive 5149034AA camshaft-position sensorOEMCrown 5149034AA
Replace the OPDA-mounted sensor only when circuit and sensor testing confirms failure Fitment/availability: 2005-2006 Wrangler TJ/Unlimited 4.0L; conditional sensor path.
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
- TipDo not ignore a new chirp from the passenger side rear of the 4.0L; catching OPDA wear early can prevent camshaft gear damage.
- TipBefore installing a replacement OPDA, mark engine position carefully and verify synchronization afterward to avoid drivability issues.
Sources for this issue (2)
P0016 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 P0016 mean on a Jeep?
P0016 stands for "Crankshaft/Camshaft Position Correlation - Bank 1 Sensor A." P0016 means the engine computer found that the crankshaft and camshaft position sensors on Bank 1 (Sensor A) are not lining up the way they should — the timing 'correlation' between them is out of range. These two sensors tell the computer where the pistons and valves are so it can time fuel injection and spark precisely. When their signals don't agree within tolerance, the computer sets this code. It generally indicates an engine timing issue, which may be a worn timing chain, a sticking variable valve timing component, or a sensor problem, and can cause rough running, hard starting, or potential engine damage if ignored. On Jeep it is documented across 2 models: Grand Cherokee, Wrangler.
What are the most common causes of P0016?
The most common causes of P0016 are: Stretched timing chain or worn timing components (guides/tensioner), Faulty camshaft position sensor or crankshaft position sensor, Stuck or faulty variable valve timing (VVT/VCT) actuator or solenoid, Low or dirty engine oil affecting the VVT actuator, Clogged oil control valve or restricted oil passages, Timing chain/belt installed one tooth off after service, Damaged reluctor/tone ring on the crankshaft or camshaft, Wiring or connector faults at the position sensors. The specific cause varies by vehicle.
How much does it cost to fix P0016 on a Jeep?
Published repair estimates on Jeep range from $350 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.
Looking for P0016 on a different make?
View P0016 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.