No. 2204.2
Service Bulletin Details
Public Details for: No. 2204.2
Instructions on advanced technical information for broken valve springs
Models from 2022
Models from 2021
1 Bulletin #: 2204.2 Advanced Technical Information Part ID: 1565 9YA, 95B, 971-Broken Valve Springs Vehicles Affected Models Model Year Model Type VIN Range Vehicle-Specific Equipment Cayenne As of 2021 up to 2022 All models (9YA) N/A N/A Macan As of 2021 up to 2022 S, GTS, Turbo (95B) N/A N/A Panamera As of 2021 up to 2022 All models (971) N/A N/A Revision History Revision Release Date Changes 0 February 12, 2022 Original document 1 February 25, 2022 Service Information Update, V6 Engine Info Update 2 December 6, 2023 Update of Technical Background reference Condition Customer complains of misfiring, vehicle may experience loss of power, and/or have a warning in the display indicating reduced power and enter limp or emergency drive mode. This condition applies to both V6 and V8 Engines. Related Faults: NOTE: Fault combination and sub-fault information may vary depending on engine type and DME software version. DME P01C900 - Fuel high-pressure system, bank 2, pressure - above limit value P2ADF00 - Leak behind throttle valve, bank 2 P030000 - Random/Multiple Cylinder, Misfire Detected P030X00 - Cylinder X misfiring P031600 - Engine Misfire Detected on Startup (First 1000 Revolutions) P036300 - Misfire Detected - Fueling Disabled P016A00 - Excessive Time to Enter Closed Loop Air/Fuel Ratio Control Instrument Cluster B19A8F0 - Display of reduced engine output, active P162400 - Engine control indicator light switched on AfterSales Dec 6, 2023 Page 1 of 4 Bulletin #: 2204.2 Advanced Technical Information Part ID: 1565 1 Technical Background The aforementioned faults/condition may be the result of a broken valve spring as shown in Figure 1. A manufac- tured batch of valve springs associated with the issue highlighted in this bulletin were quarantined by Parts Withdrawal GR13D599 Valve Spring PAB109623/958109623 (published March 14, 2022). Any remaining stock of springs not quaratined or new parts received are therefore considered safe to use for installation. In many cases, failures occur in less than 1000km (620 mls) of runtime, of which the majority are below 500 km (310 mls). Figure 1 - Broken Valve Spring Service Information A conventional misfire diagnosis is appropriate and necessary. If the mileage is low and the spark plugs are removed for compression (leak down could mask issue), the use of a borescope in the affected cylinder(s) may more quickly reveal if a valve(s) is not seated properly. More extensive, collateral damage will require the “Repair vs. Replace Analysis” and normal warranty guidelines apply. In the event one or more valve springs are broken, then ALL VALVE SPRINGS MUST BE REPLACED (INTAKE AND EXHAUST). Please perform the repairs in accordance with the respective workshop instructions. Vehicles previously repaired for a broken valve spring(s) require no further action at this time. AfterSales Dec 6, 2023 Page 2 of 4 Bulletin #: 2204.2 Advanced Technical Information Part ID: 1565 1 New springs must be replaced in the following orientation in V8 engines: Figure 2 - Orientation Exhaust: ALWAYS blue 90 deg (4x) apart on top of the spring, these markings must be facing up with the spring installed Intake: ALWAYS white 120 deg (3x) apart on top, installed facing up Springs in V6 engines will be replaced similarly with all white markings facing up when arranged in the cylinder head. Warranty As always, please document the repair completely in PCSS. For this repair, please code the “cause” as follows: Cause location: 15650 Valve Spring Cause symptom: 1511 Broken into pieces Please employ the respective operations for relevant valve spring operation. AfterSales Dec 6, 2023 Page 3 of 4 Bulletin #: 2204.2 Advanced Technical Information Part ID: 1565 1 Search Items 971, 95B, 9YA, Valve, Valve spring, Fracture, Power loss, Intake, Exhaust, Pressure loss, Misfire, 15650 Important Notice: Technical Bulletins issued by Porsche Cars North America, Inc. are intended only for use by professional automotive technicians who have attended Porsche service training courses. They are written to inform those technicians of conditions that may occur on some Porsche vehicles, or to provide information that could assist in the proper servicing of a vehicle. Porsche special tools may be necessary in order to perform certain operations identified in these bulletins. Use of tools and procedures other than those Porsche recommends in these bulletins may be detrimental to the safe operation of your vehicle, and may endanger the people working on it. Properly trained Porsche technicians have the equipment, tools, safety instructions, and know-how to do the job properly and safely. Part numbers listed in these bulletins are for reference only. The work procedures updated electronically in the Porsche PIWIS diagnostic and testing device take precedence and, in the event of a discrepancy, the work procedures in the PIWIS Tester are the ones that must be followed. A13376 ©2023 Porsche Cars North America, Inc. AfterSales Dec 6, 2023 Page 4 of 4