P2753 Transmission fluid cooler valve circuit is open

Transmission fluid cooler control circuit open

Severity not verified — if the car runs badly, have it inspected

Audi owners say the dash message reads that you can continue driving, but no Audi source tells us how long. The cause in the complaints is a leaking coolant valve, which gets worse, so we cannot label it from a maker source.

Source: how we rate severity

P2753 in short

P2753 means the computer found an open circuit in the transmission fluid cooler control, usually a valve or its wiring. On 2012-2013 Audi A6, A7 and A8 owners report a leaking coolant control valve that damages the connector. Heat may stop working too. Have it checked soon.

Some transmissions run fluid through a cooler and use a valve to control the flow. P2753 is stored when the computer sees the circuit for that valve is open, as if it were unplugged or broken.

TroubleCodes.net lists wiring or the transmission fluid cooler as the cause. The Audi complaints are more specific: the transmission coolant control valve leaks, coolant runs into its connector and wiring, and the connection corrodes.

One owner also lost cabin heat, and one saw the repeated message that the transmission has a malfunction but driving can continue. These are owner reports on three Audi models, not a bulletin.

Most likely causes

  1. Leaking transmission coolant control valve (Audi A6, A7, A8)

    Supported by vehicle data
    Why it ranks here
    Three owners of 2012-2013 Audis describe coolant leaking from the valve onto the connector and wiring, and one replaced the valve to fix P2753. They are owner reports, so the label is vehicle data, not bulletin-confirmed.
    What would change this
    Rises if coolant is seen at the valve or connector, or the coolant level drops. Falls if the valve and connector are dry and intact.

  2. Corroded or damaged wiring or connector

    Common general cause
    Why it ranks here
    Wiring is the first listed cause on TroubleCodes.net, and the Audi owners describe corrosion at the connector.
    What would change this
    Rises if the connector shows corrosion or the circuit reads open. Falls if the circuit is continuous.

  3. Transmission fluid cooler or its valve

    Common general cause
    Why it ranks here
    TroubleCodes.net lists the transmission fluid cooler as a possible cause.
    What would change this
    Rises after wiring and connector test good.

What to test first

Start at step 1. Each result tells you what it means and where to go next.

  1. Check the coolant level, and look for coolant residue near the transmission coolant control valve and its electrical connector.

    Use cautionTool: flashlight

    Warning:Do not open the coolant reservoir when the engine is hot; the system is under pressure and the coolant can scald.

  2. Have a shop read the transmission module codes and check the valve circuit for continuity.

    Best left to a shopTool: scan tool that reads the transmission module, multimeter

    Warning:Needs the maker's wiring diagram and access under the car near hot and moving parts. Leave this to a shop.

Symptoms

  • Check engine light, sometimes at highway speed
  • 'Transmission Malfunction: You can continue driving' message that comes and goes (A6 owner)
  • No hot air from the vents (A8 owner, where coolant was leaking)

How to fix

  1. Do not clear the codes before the transmission module has been read; the stored data helps the shop.

  2. Check the coolant level and watch for it dropping.

Parts and cost context

  • Transmission control module (TCM):The valve and its connector are what owners replaced. Labor varies; get a quote.

Labor varies by vehicle and shop; get a quote before you approve a repair.

Compare used part prices on PartPriceGuide

On your vehicle

Audi

  • 2012 · A6

    Supported by vehicle data

    A 2012 A6 owner reports P2753 with TCU code 12448, intermittent transmission malfunction messages and coolant dripping on the transmission wiring. Owner report only.

  • 2012 · A7

    Supported by vehicle data

    A 2012 A7 owner reports P2753 with the transmission coolant control valve replaced after coolant leaked into the solenoid. Owner report only.

  • 2013 · A8

    Supported by vehicle data

    A 2013 A8 owner reports P2753 and no hot air, with coolant leaking through the control valve into the connector. Owner report only.

No curated relationships for P2753 yet.

All Transmission codes

Sources and review

  1. NHTSA complaint ODI 11466406, 2012 Audi A6 — NHTSA Office of Defects Investigation (owner complaint)
  2. NHTSA complaint ODI 11444597, 2013 Audi A8 — NHTSA Office of Defects Investigation (owner complaint)
  3. NHTSA complaint ODI 11447185, 2012 Audi A7 — NHTSA Office of Defects Investigation (owner complaint)
  4. P2753 trouble code — TroubleCodes.net
Last reviewed
Written by
Saurabh K.
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