C0700 on Cadillac
Transmission Control Module Communication
C0700 on Cadillac vehicles indicates transmission control module communication. Au7o has documented this code across 1 Cadillac model — most commonly on Escalade ESV. This chassis/network code indicates a communication problem with the Transmission Control Module (TCM) — another module on the vehicle isn't receiving the expected messages from the transmission controller over the data network (CAN bus). Modern vehicles share information between modules, and the TCM normally broadcasts data like gear position and transmission status. When those messages are missing, corrupted, or delayed, the reporting module sets this code, which can cause warning lights, limp-mode transmission behavior, or features that depend on transmission data to malfunction. The cause is usually wiring, connectors, power/ground, or a fault in the TCM or network rather than the transmission's mechanical parts. Typical repair costs on Cadillac range from $600 to $3,000, depending on the specific model and root cause.
Common Causes of C0700
- •Damaged, corroded, or loose CAN bus / data wiring
- •Poor power or ground supply to the TCM
- •Faulty connector at the TCM or in the network
- •Failed Transmission Control Module (TCM)
- •Other module faulting the bus and disrupting communication
- •Software/calibration mismatch after a module replacement
- •Blown fuse feeding the TCM
C0700 on Cadillac by Model
Cadillac Escalade ESV(1 issue)
- Autoride Air Suspension Compressor and Shock Failure2002-2006
The Escalade ESV equipped with the Autoride electronic air suspension system experiences compressor burnout and air shock/strut failure. The compressor runs excessively trying to compensate for leaking air shocks, eventually overheating and failing. Replacement OEM air shocks are extremely expensive, and the compressor costs $800+ from the dealer. This affects the rear air shocks most commonly but front electronic struts also fail.
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View C0700 across all makes →Frequently Asked Questions
What does C0700 mean on Cadillac?▼
C0700 stands for "Transmission Control Module Communication." This chassis/network code indicates a communication problem with the Transmission Control Module (TCM) — another module on the vehicle isn't receiving the expected messages from the transmission controller over the data network (CAN bus). Modern vehicles share information between modules, and the TCM normally broadcasts data like gear position and transmission status. When those messages are missing, corrupted, or delayed, the reporting module sets this code, which can cause warning lights, limp-mode transmission behavior, or features that depend on transmission data to malfunction. The cause is usually wiring, connectors, power/ground, or a fault in the TCM or network rather than the transmission's mechanical parts. On Cadillac specifically, this code is documented across 1 model.
What causes C0700 on Cadillac vehicles?▼
Common causes on Cadillac: Damaged, corroded, or loose CAN bus / data wiring, Poor power or ground supply to the TCM, Faulty connector at the TCM or in the network, Failed Transmission Control Module (TCM), Other module faulting the bus and disrupting communication. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix C0700 on a Cadillac?▼
Repair costs on Cadillac range from $600 to $3,000, depending on the specific model and root cause.
Which Cadillac models have C0700 documented?▼
Au7o has documented C0700 on 1 Cadillac model: Escalade ESV.