P0018 on Jaguar
Crankshaft/Camshaft Position Correlation - Bank 2 Sensor A
P0018 on Jaguar vehicles indicates crankshaft/camshaft position correlation - bank 2 sensor a. Au7o has documented this code across 3 Jaguar models — most commonly on XF, XJ, XK. This code means the computer detected that the crankshaft and the Bank 2 'A' (typically intake) camshaft are out of their expected timing relationship. The computer compares the crankshaft and camshaft position sensor signals; they should stay in a fixed correlation as the engine turns. When the Bank 2 camshaft is too far off from the crankshaft, P0018 sets, indicating the valve timing on that bank is misaligned. This can cause rough running, reduced power, hard starting, or a no-start, and in some cases signals timing chain or phaser trouble that warrants prompt attention. Typical repair costs on Jaguar range from $3,500 to $9,000, depending on the specific model and root cause.
Common Causes of P0018
- •Stretched, worn, or jumped timing chain (Bank 2)
- •Worn or broken timing chain guides/tensioner
- •Stuck variable valve timing solenoid or phaser
- •Low or dirty engine oil affecting the phaser
- •Faulty crankshaft or camshaft position sensor
- •Damaged reluctor/tone ring
- •Incorrect timing from prior service
- •Wiring or connector fault at a cam/crank sensor
P0018 on Jaguar by Model
Jaguar XF(1 issue)
- Timing Chain Tensioner Failure on AJ-V82009-2015
The Jaguar AJ-V8 engines in the XF suffer from hydraulic timing chain tensioner failure, causing chain slack on cold starts. The tensioner bleed-down allows the chain to rattle against the guides, and prolonged neglect leads to stretched chains and jumped timing, risking catastrophic valve-to-piston contact.
Jaguar XJ(1 issue)
- AJ133 5.0 V8 Timing Chain Tensioner Ratchet and Plastic Guide Rail Wear2010-2015
The 5.0-litre AJ133 V8 fitted to the X351 has a widely documented timing drive weakness that has nothing to do with the earlier 4.2 AJ34's plastic tensioner story — the X350's 4.2 already ran metal tensioners and Morse chains, and merging the two engines' histories is the standard error on this nameplate. On the AJ133, the hydraulic tensioner's hardened steel plunger bears against a guide rail with a soft aluminium core and a plastic wear face. The plunger cuts a groove into that face; the ratchet that is supposed to hold tension with the engine off then cannot, and the chain slaps on start-up before oil pressure builds. There are no fault codes at the rattle stage, which is exactly why it gets ignored. Left alone, the chain can jump a tooth — giving a restricted-performance warning and misfire codes — or break, which on this interference engine destroys it. Jaguar Land Rover revised the timing components progressively, with the setup substantially reworked by around 2015-2016, so late facelift cars are lower risk than early ones.
Jaguar XK(1 issue)
- Timing Chain Tensioner Failure on AJ-V82007-2015
The AJ-V8 engine in the XK shares the same timing chain tensioner weakness found across the Jaguar V8 range. The hydraulic tensioners bleed down when the engine is off, causing the timing chains to rattle on startup and progressively stretch until timing is compromised.
Looking for P0018 on a different make?
View P0018 across all makes →Frequently Asked Questions
What does P0018 mean on Jaguar?▼
P0018 stands for "Crankshaft/Camshaft Position Correlation - Bank 2 Sensor A." This code means the computer detected that the crankshaft and the Bank 2 'A' (typically intake) camshaft are out of their expected timing relationship. The computer compares the crankshaft and camshaft position sensor signals; they should stay in a fixed correlation as the engine turns. When the Bank 2 camshaft is too far off from the crankshaft, P0018 sets, indicating the valve timing on that bank is misaligned. This can cause rough running, reduced power, hard starting, or a no-start, and in some cases signals timing chain or phaser trouble that warrants prompt attention. On Jaguar specifically, this code is documented across 3 models.
What causes P0018 on Jaguar vehicles?▼
Common causes on Jaguar: Stretched, worn, or jumped timing chain (Bank 2), Worn or broken timing chain guides/tensioner, Stuck variable valve timing solenoid or phaser, Low or dirty engine oil affecting the phaser, Faulty crankshaft or camshaft position sensor. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0018 on a Jaguar?▼
Repair costs on Jaguar range from $3,500 to $9,000, depending on the specific model and root cause.
Which Jaguar models have P0018 documented?▼
Au7o has documented P0018 on 3 Jaguar models: XF, XJ, XK.