Common Jaguar Issue: Engine Running Lean

Make: Jaguar | Model example: 2016 XJ 3.0 | Avg Mileage: 84674 | Job Number: 627542

Repair Issue:

The engine is running lean.

Cause:

Failed Partial Load Operation Crankcase Ventilation Valve.

Customer Concern:

There are lean codes stored in the Engine Control Module (ECM). The engine is running lean.

Test/Procedure:

1. Locate the partial load crankcase breather assembly using the attached diagrams. Block off the hose at the intake.
2. Watch fuel trims with scan tool. If fuel trim numbers change from an excessive lean condition toward a normal reading of 0%, then replace the partial load breather assembly. See related document for SSM74374 that shows updated parts repair information so you don’t have to replace the valve cover.
3. Reset the ECM adaptations after repairs.
   Related Docs: Crankcase Ventilation
   Intake Air Distribution
   SSM74374 – V6 3.0L + V8 5.0L Petrol Rig…shaft Cover Lower Level Repair _ TOPIx
   Rover Replace Positive Crankcase Ventilation Cap

Tech Tip:

P2189-00 System Too Lean at Idle – Bank 2
P2187-00 System Too Lean at Idle – Bank 1
P0171-00 System Too Lean (Bank 1)
P0174-00 System Too Lean (Bank 2)
Disregard fault code P0191 Fuel Rail Pressure Sensor Circuit, if set with crankcase vent issue.

Important Take-A-Way:

Tech Tip provides information related to Crankcase Ventilation and the Crankcase Ventilation Valve, and points mechanics to related documentation that is helpful for diagnosing this specific repair.

Most Popular Fix:

Replaced Partial Load Operation Crankcase Ventilation Valve – Repaired/Replaced Crankcase Ventilation Control Valve – Replaced/Resealed Valve Cover – Repaired/Replaced Positive Crankcase Ventilation (PCV) System.

Other Common Car Problems:

View more common car problems from the most popular manufactures including Ford, Dodge, Chevrolet, Honda, Toyota, and more. Read more

Also applies to the following Makes and Models

2014 F-Type 3.0, 2015 F-Type 3.0, 2016 F-Type 3.0, 2014 F-Type 5.0, 2015 F-Type 5.0, 2016 F-Type 5.0, 2016 XE 3.0, 2012 XF 3.0, 2013 XF 3.0, 2014 XF 3.0, 2015 XF 3.0, 2016 XF 3.0, 2010 XF 5.0, 2011 XF 5.0, 2012 XF 5.0, 2013 XF 5.0, 2014 XF 5.0, 2015 XF 5.0, 2010 Xfr 5.0, 2011 Xfr 5.0, 2012 Xfr 5.0, 2013 Xfr 5.0, 2014 Xfr 5.0, 2015 Xfr 5.0, 2013 Xfr-S 5.0, 2014 Xfr-S 5.0, 2015 Xfr-S 5.0, 2013 XJ 3.0, 2014 XJ 3.0, 2015 XJ 3.0, 2016 XJ 3.0, 2010 XJ 5.0, 2011 XJ 5.0, 2012 XJ 5.0, 2013 XJ 5.0, 2014 XJ 5.0, 2015 XJ 5.0, 2016 XJ 5.0, 2014 XJR 5.0, 2015 XJR 5.0, 2016 XJR 5.0, 2010 Xk 5.0, 2011 Xk 5.0, 2012 Xk 5.0, 2013 Xk 5.0, 2014 Xk 5.0, 2015 Xk 5.0, 2013 XKR 3.0, 2010 XKR 5.0, 2011 XKR 5.0, 2012 XKR 5.0, 2013 XKR 5.0, 2014 XKR 5.0, 2015 XKR 5.0, 2012 XKR-S 5.0, 2013 XKR-S 5.0, 2014 XKR-S 5.0, 2015 XKR-S 5.0, 2014 Discovery 3.0, 2015 Discovery 3.0, 2016 Discovery 3.0, 2014 LR4 3.0, 2015 LR4 3.0, 2016 LR4 3.0, 2010 LR4 5.0, 2011 LR4 5.0, 2012 LR4 5.0, 2013 LR4 5.0, 2014 Range Rover 3.0, 2015 Range Rover 3.0, 2016 Range Rover 3.0, 2010 Range Rover 5.0, 2011 Range Rover 5.0, 2012 Range Rover 5.0, 2013 Range Rover 5.0, 2014 Range Rover 5.0, 2015 Range Rover 5.0, 2016 Range Rover 5.0, 2014 Range Rover Sport 3.0, 2015 Range Rover Sport 3.0, 2016 Range Rover Sport 3.0, 2010 Range Rover Sport 5.0, 2011 Range Rover Sport 5.0, 2012 Range Rover Sport 5.0, 2013 Range Rover Sport 5.0, 2014 Range Rover Sport 5.0, 2015 Range Rover Sport 5.0, 2016 Range Rover Sport 5.0

Author: Brian Franta

Brian began his automotive career in 1994 by attending the Dunwoody Institute in Minneapolis, MN. At that time, he also started working at various automotive independent repair centers. After graduation, he went to work for a Ford/Lincoln/Mercury dealership for 5 years, and then moved to a Mercedes Benz dealership for 6 1/2 years. Brian has been part of the European team at Identifix since 2008. His qualifications include Mercedes Benz Master Certified Technician, ASE Master, and is an ASE L1 Certified Technician. Brian likes to go snowmobiling, ice fishing, and hunting. Over the summer months he enjoys camping with his wife and two daughters.

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