U2064 — Another Module Requested Warning Indicator

U2064 — Another Module Requested Warning Indicator. U2064 identifies a warning request from another control module, so the underlying condition should be diagnosed promptly.

For Ford vehicles

warning indicator requested by another control module

vehicle

Is it safe to drive?

Prompt diagnostic review U2064 identifies a warning request from another control module, so the underlying condition should be diagnosed promptly. If the illuminated warning concerns brakes, steering, airbags, or propulsion, stop safely and repair the vehicle before continuing.

Typical symptoms

  • U2064 is stored as a current, pending, or permanent diagnostic trouble code.
  • A warning lamp or message-center warning appears when another control module detects a fault.
  • The requested warning remains illuminated after the originating condition appears to have been repaired.
  • U2064 is present even though the expected warning indicator is not visibly illuminated.
  • The scanner reports related network communication codes or fault information from another control module.

Common causes

  • A control module detects an abnormal operating condition and requests that a warning indicator be displayed.
  • Communication between the requesting module and the warning-indicator receiving module is intermittent or defective.
  • A low-voltage event or control-module power interruption leaves the warning request latched in memory.
  • The warning-indicator receiving module has an internal driver failure, open circuit, short circuit, or failed lamp.
  • Incorrect module configuration or incomplete software initialization causes an invalid or persistent warning request.

How to diagnose with an OBD scanner

  1. Capture U2064 with an OBD scanner Connect an ELM327 adapter and use AIScanAuto or another scanner to run an enhanced full-vehicle scan. Save U2064 status, freeze-frame data, and every related trouble code before clearing anything.
  2. Identify the requesting control module Review current and pending codes, freeze-frame conditions, and lamp-command data from each module. The module reporting the underlying fault should explain why it requested the warning indicator associated with U2064.
  3. Confirm the warning request Determine whether the receiving module received the request and commanded the lamp. If U2064 is stored but no indicator appears, inspect the bulb, LED, indicator driver, connector, and the wiring specified by the vehicle wiring diagram.
  4. Check network and module power Inspect the vehicle network wiring, connectors, termination, and communication links between the requesting and receiving modules. Also verify stable battery voltage, adequate charging, and clean, secure module grounds.
  5. Repair the originating condition Address the specific fault or open, shorted, or misconfigured indicator circuit that caused the request. Do not replace a module solely because U2064 is present; first prove the fault with wiring tests and module data.
  6. Clear and verify the repair Clear the stored codes, cycle the ignition, and rescan all modules. U2064 should not return unless another module issues a new warning request. Document the originating code and repair before erasing the final scan results.

Approximate repair cost

A rough independent-shop estimate is USD 150-650 for diagnosis and common warning-lamp, wiring, or communication repairs. These figures are estimates, not verified quotes, and vary by region, vehicle, and labor time; control-module replacement may cost more.

Common questions

What does U2064 mean?

U2064 means a control module requested that a warning indicator be displayed. It identifies the request but does not, by itself, identify the failed component or even the specific lamp.

Does U2064 mean the warning bulb has failed?

Not necessarily. U2064 may be present because another module issued the request; a failed bulb, indicator driver, or related wiring is only one condition that should be checked.

Can the vehicle be driven with U2064 stored?

U2064 warrants prompt diagnosis rather than immediate parts replacement. If the active warning concerns brakes, steering, airbags, or propulsion, stop safely and repair the vehicle before driving.

How is U2064 diagnosed and corrected?

Scan every control module with an OBD scanner, locate the originating fault, verify the warning request and lamp circuit, and test network power and wiring. Repair the proven cause, then clear and rescan to confirm U2064 stays cleared.

U2064 — U2064 - Manufacturer Controlled DTC

What does U2064 mean?

When U2064 appears on a scan, it means the control module has flagged a problem in the vehicle network (CAN bus) communication: U2064 - manufacturer controlled DTC. The fault sits in the vehicle group of the OBD2 standard.

The module monitors this system continuously while driving. When readings fall outside the expected range for a defined number of drive cycles, it stores U2064 and switches on the warning light. Freeze frame data saved with the code shows the exact conditions — rpm, load, temperature, speed — at the moment the fault was detected, which is the best starting point for diagnosis.

Common symptoms of U2064

  • modules intermittently not communicating with the scanner
  • no-start or intermittent starting in some cases
  • random, hard-to-reproduce electrical glitches
  • intermittent loss of functions (gauges, windows, steering assist)
  • multiple warning lights on at once

What causes U2064?

  • aftermarket equipment interfering with the bus
  • corroded connectors, especially in wet areas
  • water ingress in harness junctions
  • poor grounds or low battery voltage
  • damaged CAN bus wiring or short to power/ground
  • a faulty module pulling the bus down

How to diagnose U2064

  1. Connect an OBD2 scanner, confirm U2064 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
  2. Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many U0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
  3. Visually inspect the wiring harness and connectors related to the vehicle network (CAN bus) communication for damage, corrosion, chafing or poor contact.
  4. Measure resistance between CAN-High and CAN-Low at the OBD port with power off — about 60 Ω is healthy.
  5. Scan all modules: the one that does not respond is either the culprit or downstream of the break.
  6. Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm U2064 does not return.

How to fix U2064

Start with the cheapest and most common causes before replacing expensive parts:

  • Remove interfering aftermarket device — $0–$150
  • Repair CAN wiring or connectors — $100–$400
  • Replace the faulty control module — $300–$1,500

How much does it cost to fix U2064?

Repair cost depends on which component actually failed. Typical scenarios for U2064 (parts and labor, USD, independent shop rates):

  • Remove interfering aftermarket device: $0–$150
  • Repair CAN wiring or connectors: $100–$400
  • Replace the faulty control module: $300–$1,500

Overall, fixing U2064 usually costs between $0 and $1,500. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Can you drive with U2064?

Depends on what is affected. A single dead convenience module is fine to drive with; loss of communication with engine, braking or steering modules is not. If multiple critical systems drop out, do not drive.

Related OBD2 codes