Tech Tip: Volkswagen Diagnostic Trouble Codes – UnderhoodService

Tech Tip: Volkswagen Diagnostic Trouble Codes

Diagnostic Trouble Codes (DTCs) P1580 (Throttle Actuator B1 Malfunction) and P0103 (Mass or Volume Air Flow Circuit High Input) are simultaneously stored in DTC memory. The problem may be caused by an attempt to start a vehicle with a dead or low-charged battery.

Diagnostic Trouble Codes (DTCs) P1580 (Throttle Actuator B1 Malfunction) and P0103 (Mass or Volume Air Flow Circuit High Input) are simultaneously stored in DTC memory. The problem may be caused by an attempt to start a vehicle with a dead or low-charged battery (below approximately 7V). These DTCs predominately show up together on a vehicle with a low-charged or dead battery.

Affected Models:
• Golf, Jetta and Passat, with engine codes ABA, AAA;
• 1996-’99 Cabrio with engine code ABA; and
• 1997-2000 EuroVan with engine code AES.

Service Procedure:
1. If an attempt is made to start a vehicle with a battery charge at approximately 7V (or lower), DTC P1580 (17988) will be stored in DTC memory.

2. Once DTC P1580 (17988) is stored, if the vehicle is then jump-started and driven, the second DTC, P0103 (16487), will then be stored.
Note: Throttle valve angle (when checked in “Basic setting” Function 04, display group 098) will be “0” in any throttle valve position.

3. Once these DTCs have been stored in DTC memory, the following applies:
• If the DTCs are erased and throttle body adaptation is not performed, both DTCs will be immediately stored again in DTC memory.
• If throttle body adaptation is performed (without erasing the DTCs), “error” will be displayed on the VAG 1551 scan tool in Display Group 098.
• In both cases, the vehicle may not start or may run poorly.

4. Do not replace any parts for this condition. Instead perform the following steps.

5. The following must be performed in sequence to remove stored DTCs P1580 and P0103:
• Battery condition must be OK.
• Charge and/or replace the battery according to procedures in latest version of VESIS, Group 27.

6. With battery condition OK:
• Connect the VAG 1551 scan tool.
• Erase any stored DTCs.
• Perform Throttle Body Adaptation (see appropriate Repair Manual).
• Erase the stored DTCs again.
• Set the readiness code.

Technical service bulletin courtesy of ALLDATA.

For additional tech tips, visit www.alldata.com.

You May Also Like

Alternators and Ripple Voltage

The alternator produces an AC current that must be converted into DC current by way of a rectifier.

Alternators have been used to charge the 12V DC electrical systems in vehicles since long before computers and networks were part of the equation. Just a few decades ago, the 12V DC electrical system wasn’t that vulnerable to ripple voltage. Today however, excessive ripple voltage can cause major communication issues across networks and can cause a number of communication DTCs to be set in multiple control modules.

Mullen Announces EV Battery Exchange Program

POWER BOOST enables existing Class 1 EV cargo van customers the opportunity to upgrade their lithium-ion battery packs to solid-state polymer battery packs, increasing Class 1 vehicle range to over 200 miles.

Power Window Regulator and Motor Service

Power windows are great as long as they roll up and down when commanded to do so.

Toyota Invests in EV Charging Network IONNA

IONNA plans to install at least 30,000 charging ports in North America by 2030, and stations will include both NACS and CCS connectors to support all BEV drivers.

Hybrid & BEV Cooling System Maintenance 

Do they need coolant replacement?

Other Posts
Following AC System Service, How Much Oil Is Needed?

Learn how to determine the correct amount of oil to add when replacing the compressor in an AC system.

Autel MaxiSYS Ultra Enhances Efficiency At Mighty Auto Pro

Time is money in vehicle repair, and the Autel MaxiSYS Ultra is all about enhancing technicians’ diagnostic prowess.

Financial Foresight For A Smooth Succession

An effective succession plan provides a smooth transition in management and ownership with a minimum of financial hassle.

Mullen Announces Class 1 EV Sale Through Eco Auto

Mullen announced its partnership with Eco Auto, a national franchise of automotive dealerships, earlier this month.