Wrong Signals: SureTrack Community Fix

by Mike Alberry

Real Fixes from Mitchell 1’s 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 available at no additional cost in our ProDemand product.

The use of a multi-meter on a Snap-on scan tool played a large role in verifying this fix. So read on to see how a code 2B10 on a Volvo XC90 was diagnosed and repaired.

The following Community Fix summarizes the interaction between members of the community that led to the solution.

Vehicle
2010 Volvo XC90 2.4 Diesel

Title
2B10, Engine lacks power, Replaced Diesel Particulate Filter Temperature Sensor

Complaint
The customer states the engine lacks power. The customer also states the check engine light is on.

Cause
Confirmed the customer’s complaint and found the engine lacked power and the check engine light was on. Connected a scan tool and found code 2B10 – Particulate Filter Temperature Sensor – Faulty Signal. With the vehicle at operating temperature, viewed scan tool live data. Found that the diesel particulate filter temperature sensor data was erratic. Disconnected the diesel particulate filter temperature sensor connector. Key on engine off used a multi-meter to check for voltage at the connector. Found that voltage was present. Viewed scan tool live data while the diesel particulate filter temperature sensor was disconnected and found it went to a default value. Measured the resistance of the diesel particulate filter temperature sensor with a multi-meter and found that it was not within manufactures specifications. These tests verified that the diesel particulate filter temperature sensor was faulty.

Correction
Replaced the diesel particulate filter temperature sensor and verified the vehicle operated properly. The customer’s concerns did not return.

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Toyota Limp Mode: SureTrack Community Fix

About the Author

Mike Alberry

Mike Alberry has over 38 years of experience in the automotive industry, including 12 years as a Porsche technician. He joined the Mitchell 1 team in 2012 and is the product manager for the ProDemand® auto repair information software, accessed online and via PC-based scan tools. Mike has two Associate of Arts degrees in automotive technology and holds four U.S. patents around automotive diagnostic tools.