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Diagnostic Dilemma: The Case of the Missing Code

When doing mobile diagnostic work, no-code stalling complaints are a major part of your agenda. In most cases, the client shop is simply too busy to duplicate the failure or, in some cases, a long test drive will yield nothing in the way of useful...

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Secondary Ignition: The Art of Spark

What is a coil? From the beginning of the internal combustion engine, several different ignition systems have been used to create a high-energy spark. The most popular system, and the one that’s in use today, is a step-up coil. A coil is nothing...

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Air Filter Show & Tell: Seeing Is Believing

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Searching For 'Black Holes': Job Totals Reveal Missed Selling Opportunities

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Ford: ABS Light On With DTCs C1175, C1236, P0500 or P0503

Model: 2005-’07 Super Duty Some 2005-‘07 Ford Super Duty vehicles may exhibit an ABS light on and possible diagnostic trouble codes (DTCs) C1175, C1236, P0500 and/or P0503. This condition may be due to faulty vehicle wiring, a failed wheel speed...

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Composite Rotors Are Back

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Power Steering Dynamics and Diagnostics

Twenty-five years ago, when the power steering failed, diagnosing the system was easy. The most difficult problem to diagnose was the “morning sickness” that plagued some ­vehicles when they were cold. Today, the introduction of speed sensitive steering,...

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Top 5 Tools: Daniel Sjobeck, Roseville Auto Repair

Daniel Sjobeck, tech Roseville Auto Repair Roseville, MN A good toolbox. You can have the best of everything, but it’s no use if you cannot find it. Power Probe – One of the greatest ­inventions EVER. Snap-on Digital Torque Wrenches Snap-on...

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Mitchell 1 ProDemand Consolidates Vintage Repair and Estimating Information

Mitchell 1 has updated its ProDemand repair, diagnostic and maintenance software by consolidating vintage repair and estimating information into the application to deliver full year, make and model coverage from 1974 to the present year. This latest enhancement...

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Pulling Codes: Multiple Misfire Personalities

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Home European Tech Tip: Mercedes-Benz MIL On/DTC P2034 Stored in ECU

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If you receive customer reports in the affected model vehicles of the “check engine” light being activated after starting the engine, and code P2034 is stored in the engine control unit, the cause may be that the ­engine ECU has detected a faulty crankshaft sensor during start up of the engine due to the camshaft ­sensor.

Affected Vehicles:

• Model 163.154/157/172/175;
• Model 164.175; and
• Model 463.249.

Note: Only vehicles with production date prior to July 2005 are affected.

This condition can be verified by checking the following values in the freeze-frame data:

Vehicle speed: 0
Engine speed: 0
Time since engine start: 0

If confirmed by freeze-frame data values, proceed as follows to resolve.

Service Procedure:

1. Check to confirm that the camshaft sensor P/N A004 153 96 28 is installed.

2. If P/N A004 153 96 28 is installed, perform the engine control unit software flash with 11/05 DAS or later.

Note: After the software flash, perform SCN coding. Refer to Star Tek Info Document S-B-07.61/38g or
S-B-58.00/144a dated Feb. 4, 2006, for the procedure.

Note: Do not replace the crankshaft sensor and camshaft sensor.

Courtesy of Mitchell 1.

For more information on Mitchell 1 products and services, automotive professionals can visit the company’s website at www.mitchell1.com.

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