C1500 on 2005-2014 Opel Zafira (Zafira B) — Transfer Case Contact Plate 'B' Encoder Circuit Failure
1 vehicles · 1 makes · $250-$900 repair
Most Reported On
C1500 is an OBD-II diagnostic trouble code meaning “Transfer Case Contact Plate 'B' Encoder Circuit Failure.” This is a chassis code for four-wheel-drive vehicles with an electronically shifted transfer case; DTC references list it for makes such as Ford and Mitsubishi rather than as a General Motors code (GM uses its own C0323/C0327-series codes for transfer case encoder faults, so do not assume this is a GM code). The transfer case control module reads the encoder/contact plate on the transfer case shift motor to know which drive mode the transfer case is actually in (2WD, 4WD High, 4WD Low, Neutral). C1500 sets when the 'B' contact plate circuit reads implausibly or fails, so the module can no longer confirm transfer case position and 4WD mode changes may be refused, incomplete, or stuck. This code is most commonly reported on 2005-2014 Opel Zafira (Zafira B), with repair costs ranging from $250 to $900.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
C1500 does not use the standard P/B/C/U prefix. It may be a manufacturer-specific code, so verify that a scanner supports your exact year, model and module before buying.
FAQ
What does C1500 mean?
C1500 stands for "Transfer Case Contact Plate 'B' Encoder Circuit Failure." This is a chassis code for four-wheel-drive vehicles with an electronically shifted transfer case; DTC references list it for makes such as Ford and Mitsubishi rather than as a General Motors code (GM uses its own C0323/C0327-series codes for transfer case encoder faults, so do not assume this is a GM code). The transfer case control module reads the encoder/contact plate on the transfer case shift motor to know which drive mode the transfer case is actually in (2WD, 4WD High, 4WD Low, Neutral). C1500 sets when the 'B' contact plate circuit reads implausibly or fails, so the module can no longer confirm transfer case position and 4WD mode changes may be refused, incomplete, or stuck.
What are the most common causes of C1500?
The most common causes of C1500 are: Failed transfer case encoder motor / contact plate assembly, Corroded or water-intruded encoder motor connector, Damaged or chafed wiring between the encoder and the transfer case control module, Worn transfer case shift motor position sensor contacts, Faulty transfer case control module (TCCM). The specific cause varies by vehicle.
How much does it cost to fix C1500?
Repair costs for C1500 range from $250 to $900, depending on the vehicle and root cause.
Which vehicles are affected by C1500?
Au7o has documented C1500 across 1 vehicle models from 1 manufacturers: Opel.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.