P0888 on Dodge
TCM Power Relay Sense Circuit
P0888 on Dodge vehicles indicates tcm power relay sense circuit. Au7o has documented this code across 1 Dodge model — most commonly on Dakota. This code sets when the transmission control module (TCM) detects an incorrect voltage on the power relay sense circuit, which monitors whether the TCM power relay is supplying voltage as expected. If the relay or its sense circuit is faulty, the TCM cannot confirm it is properly powered to control the transmission. Symptoms can include shifting problems, the transmission entering failsafe mode, and a check engine light. The fault usually lies in the power relay, the sense wiring, or related connections. Typical repair costs on Dodge range from $200 to $800, depending on the specific model and root cause.
Common Causes of P0888
- •Faulty TCM power relay
- •Open, shorted, or corroded sense-circuit wiring
- •Blown fuse in the power/relay circuit
- •Poor or loose connector at the relay or TCM
- •Poor ground connection
- •Low system voltage
- •Faulty TCM (less common)
P0888 on Dodge by Model
Dodge Dakota(1 issue)
- Transmission Overdrive Solenoid Failure (42RE/45RFE)1997-2011
The 42RE (4-speed) and 45RFE/545RFE (5-speed) automatic transmissions in the Dakota suffer from overdrive solenoid failures. The overdrive solenoid sticks or fails electrically, preventing the transmission from engaging overdrive or causing it to drop out of overdrive unexpectedly. This increases highway fuel consumption and engine RPM. The issue is exacerbated by old, contaminated transmission fluid.
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View P0888 across all makes →Frequently Asked Questions
What does P0888 mean on Dodge?▼
P0888 stands for "TCM Power Relay Sense Circuit." This code sets when the transmission control module (TCM) detects an incorrect voltage on the power relay sense circuit, which monitors whether the TCM power relay is supplying voltage as expected. If the relay or its sense circuit is faulty, the TCM cannot confirm it is properly powered to control the transmission. Symptoms can include shifting problems, the transmission entering failsafe mode, and a check engine light. The fault usually lies in the power relay, the sense wiring, or related connections. On Dodge specifically, this code is documented across 1 model.
What causes P0888 on Dodge vehicles?▼
Common causes on Dodge: Faulty TCM power relay, Open, shorted, or corroded sense-circuit wiring, Blown fuse in the power/relay circuit, Poor or loose connector at the relay or TCM, Poor ground connection. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0888 on a Dodge?▼
Repair costs on Dodge range from $200 to $800, depending on the specific model and root cause.
Which Dodge models have P0888 documented?▼
Au7o has documented P0888 on 1 Dodge model: Dakota.