Fuel Trim And AFR Sensors
This summer, an old friend and former teaching partner arrived at our local car show with the check engine light illuminated on his 2004 Holden Monaro, which was imported from Australia and rebadged and sold in the U.S. Its unique corporate history aside, this relatively rare imported muscle car had the all-too-common P0171 and P0174 trouble codes stored in its diagnostic memory.
Delphi Announces Five New Mass Air Flow Sensors Covering Nearly 1 Million Vehicles
Delphi Product & Service Solutions has announced the addition of five new mass airflow sensors (MAF) covering nearly 1 million vehicles built from 1990 to 2013. Applications cover manufacturers including Nissan, Audi, Toyota and Infiniti. New part numbers include: AF10198, AF10209, AF10214, AF10218 and AF10221. What MAF Sensors Do MAF sensors measure intake airflow and
Bosch Adds To Braking, O2 Sensor, Ignition Coil, Filter Lines
Bosch has expanded its portfolio of part numbers for select product lines. A total of 47 new part numbers has been added to the Bosch offering in the braking, O2 sensor, ignition coil and oil filter lines. Bosch QuietCast Brake Pads and Bosch Blue Brake Pads Thirty-four new Bosch QuietCast and Bosch Blue Brake Pad
Pulling Codes: O2 Sensor Heater Circuit Malfunction
Pulling a P0135 Oxygen Sensor Heater Circuit Malfunction (Bank 1 Sensor 1) code means you’re dealing with a possible oxygen sensor heater element and/or associated components in this circuit. This article provides a game plan for diagnosing a vehicle with this code.
Fuel Trim Diagnosis And O2 Sensor Performance
A useful diagnostic tool is to determine if the fuel trim problem exists in more than one engine operating range. Fuel trim should be checked at idle, at 1,500 rpm and at 2,500 rpm. In addition to these no-load checks, drive the vehicle at various steady load conditions and watch for fuel trim variation.
Troubleshooting Mass Air Flow (MAF) Sensors
Troubleshooting mass air flow (MAF) sensor problems can become a major headache for import technicians because the failure is usually one that involves a calibration error rather than an outright electrical or mechanical failure. Because calibration errors tend to be “gray-area” types of problems, we will begin by looking at the basics of how a “hot-wire” MAF sensor measures airflow through an engine running at various speeds and loads.
Diagnostic Solutions: Engine Coolant Temperature Sensors
Considering that roughly 1,500 or more different vehicle models are introduced into our domestic market each year, it’s becoming more difficult to predict how a Powertrain Control Module (PCM) will utilize data from a particular sensor or detect an out-of-range sensor in any single vehicle platform. The engine coolant temperature (ECT) sensor provides a good illustration of how many on-board diagnostic strategies have changed.
Tech Tip: A Day In The Life Of A Contaminated O2 Sensor
Since the oxygen sensor is in the exhaust stream, it can become contaminated over time. Much like a spark plug, the oxygen sensor can be examined and “read” to determine what the cause of contamination might be.
Bosch Expands Its O2 Sensor Line; Adds 82 New OE-Fit Part Numbers
Bosch has expanded its line of oxygen sensors to cover applications through the current 2013 model year. The 82 new OE-fit sensors cover 21.9 million vehicles in the United States and Canada including a variety of domestic and import applications – both Asian and European. Besides a host of passenger cars, minivans and SUVs, the new coverage also includes several hybrid vehicles.
Diagnostic Solutions: No-Code Sensor Failures
Import Specialist Contributor Gary Goms takes a look at how to utilize one or more scan tool features to detect an intermittent, no-code sensor failure.