SureTrack Real Fix: TPS Report

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.

Throttle position sensors are a key component in any modern engine. If they are giving the wrong reading, everything else goes haywire. Follow this Real Fix to see how a driveability problem on this BMW X5 was diagnosed and repaired.

2001 BMW X5 30i 3.0L

P0101, Replaced Throttle Body

The customer states the check engine light is on and vehicle not running right.

Connected a scan tool and found code P0101 – Mass Or Volume Air Flow “A” Circuit Range/Performance. Performed a road test while monitoring scan tool data and observed the throttle position sensor parameter was not within the specified range. Performed an inspection of the throttle body and detected no signs of deposits or debris. Inspected the throttle position sensor wiring harness and connector, but detected no obvious faults. With the ignition on and the engine off, used a multi-meter to check for the presence of voltage and ground at the throttle position sensor connector and found both were present. Backprobed the throttle position sensor and performed a throttle sweep while monitoring the sensor signal on a lab scope. The throttle position sensor signal observed on the lab scope was above specifications, indicating the throttle position sensor was faulty. The throttle position sensor is integrated into the throttle body and is replaced as an entire unit.

Replaced the throttle body, cleared codes, performed a road test and verified the vehicle operated properly. The check engine light did not illuminate and no fault codes returned.

SureTrack® is a powerful value-added feature available with select Snap-on diagnostics tools. It offers an exclusive combination of expert knowledge and detailed parts replacement records, all wrapped in an interactive community.

Want more? Click here for more information on using SureTrack.

New or Expired SureTrack users: Click here for authorization key instructions.

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.