SureTrack Community Real Fix: Acceleration Hesitation

Real Fixes from the SureTrackĀ® 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-onĀ® diagnostic software version.

2017 Opel/Vauxhall 1.6L Diesel

DF033, Replaced Exhaust Back Pressure Sensor

The customer states the engine hesitates when accelerating. The customer also states the check engine light is on.

Connected a scan tool and found code DF033 – Pressure Upstream Of Turbo Out Of Range. Off idle, used the scan tool to monitor live data and found the exhaust back pressure sensor signal parameter intermittently dropped out. Performed a visual inspection of the exhaust back pressure sensor and found no obvious faults. With the key on, engine off, used a multi-meter to check for the presence of voltage and ground at the exhaust back pressure sensor and found both were present. At idle, backprobed the exhaust back pressure sensor and monitored the sensor signal on a lab scope. The exhaust back pressure sensor signal observed on the lab scope was erratic. These test results verified the exhaust back pressure sensor was faulty.

Replaced the exhaust back pressure sensor, cleared codes, performed a road test and verified the vehicle operated properly.

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About the Author

Abagail Lucero

Abagail Lucero is the Product Marketing Manager for ProDemand. She joined the company in 2011 as a member of the SocialCRM shop marketing team and has served in many roles at Mitchell1, lastly as Security and Compliance Supervisor. Abagail holds a Bachelor of Science degree from California University of Pennsylvania.