How is fault code P0701 fixed?

A typical diagnostic sequence used by mechanics, provided here for educational reference only. Diagnostic work should be performed by a qualified mechanic with the appropriate tools and training. 1. Read all stored codes, not just P0701. It rarely sits on its own, and a partner code like P0715 or P0730 usually tells you which part of the system is actually unhappy 2. Check the transmission fluid level and condition. Low, milky, or smelling burnt means deal with that before chasing electrics. On many sealed-for-life boxes you need to check it at temperature on a level surface 3. Inspect the transmission loom and connectors for corrosion, chafing, and water in the plugs. Wiggle-test the harness with live data running to catch intermittent dropouts 4. Confirm the TCM is getting a clean 12-14.5V supply with the ignition on and that the earth resistance is under 0.1 ohm. A bad earth mimics all sorts of phantom faults 5. Check battery and charging system voltage. A dying battery or alternator will throw voltage spikes that set range/performance codes that aren't really gearbox faults 6. Use live data and, where the tool allows, activate the shift solenoids individually. Then clear the co

Transmission Control System Range/Performance

Jump to the fix

Severity

High

Can I keep driving?

Avoid extended driving; visit a service soon.

First step

A typical diagnostic sequence used by mechanics, provided here for educational reference only. Diagnostic work should be performed by a qualified mechanic with the appropriate tools and training. 1. Read all stored codes, not just P0701. It rarely sits on its own, and a partner code like P0715 or P0730 usually tells you which part of the system is actually unhappy 2. Check the transmission fluid level and condition. Low, milky, or smelling burnt means deal with that before chasing electrics.

PPowertrain
0Generic code
7Transmission
01Sequence number

What does it mean?

Like the rest of the modern automobile, the most basic of which have more processing power than the original Space Shuttle, the modern automatic transmission is monitored by numerous sensors and controlled by a number of solenoids and regulators. The TCM (transmission control module) houses all the electronics required for proper automatic transmission operation.

Like the ECM (engine control module) and other vehicle modules, the TCM looks for feedback, within certain thresholds, when it activates a solenoid, for example. Anything outside the expected parameters is determined to be a fault, at which time the TCM sets a DTC (diagnostic trouble code). The ECM, with which the TCM may or may not be integrated, depending on year, make, and model, sets a TCM informational DTC and illuminates the MIL (malfunction indicator lamp).

DTC P0701 refers to a generic transmission control system fault, but not to a specific fault, such as a solenoid or brake, for example. On encountering DTC P0701 in ECM memory, further diagnosis will be required to determine the nature of the fault.

Symptoms

Likely causes

How to fix it

Codes From the Same System

All Fault Codes

Related Similar Codes

This information follows the generic OBD-II definition and does not replace a vehicle-specific diagnosis. The severity rating is rule-based; an authorised diagnostic reading is required for a definitive answer.