SureTrack Real Fix: A Noisy Diesel

Real Fixes from the SureTrack® expert information resource are documented issues from actual shop repair orders and community discussions. Read on to see how SureTrack can help you correct issues that are not easily diagnosed using OEM information alone. SureTrack is currently available free with the purchase of a current Snap-on® diagnostic software version.

Check out this Land Rover Freelander Real Fix. An unusual engine noise with the check engine light on turned into the vehicle getting a full throttle unit replacement. The whole operation was a success and resulted in a fault code free smooth drive. Read on to find out about the steps taken to find the fix.

Vehicle
2010 Land Rover Freelander 2.2 Diesel

Title
P02E0, P02E9, Noise Heard, Replaced Diesel Intake Throttle Valve

Complaint
The customer states an unusual noise is heard from the vehicle. The customer also states the check engine light is on.

Cause
Confirmed the customer’s complaint and heard an unusual noise from the vehicle. Connected a scan tool and found codes: P02E0 – Diesel Intake Air Flow Control Circuit/ Open and P02E9 – Diesel Intake Air Flow Position Sensor Circuit High. Used a set of fused jumper wires to apply voltage and ground to the diesel intake throttle valve and found the valve responded but was noisy when operating. Used a lab scope to backprobe the diesel intake throttle valve position sensor, snapped the throttle open and found the sensor signal dropped out. Removed the diesel intake throttle valve and inspected the control motor gear and found the teeth on the gear were damaged. The control motor gear is integrated into the diesel intake throttle valve and is replaced as an entire unit.

Correction
Replaced the diesel intake throttle valve, reset the diesel intake throttle valve, cleared the codes, performed a road test, and verified the vehicle operated properly. The check engine light did not illuminate, no unusual noises and no fault codes returned.


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About the Author

Nick Taylor

Nick Taylor is the SureTrack Community Administrator and a Senior Applications Specialist at Mitchell 1 with over 25 years of experience with electronic repair data systems. Nick previously worked in the automotive dismantling and engine rebuilding industries.