Code
P2753
Generic
P — Powertrain
Transmission Fluid Cooler Control Circuit/Open
AI status
Completed
Completed
100%
Causes
- Open or shorted wiring in the cooler control circuit
- Poor or corroded connector(s) at the cooler control solenoid/valve or module
- Failed transmission fluid cooler solenoid/valve (open coil)
- Faulty TCM/PCM driver output or internal module fault
- Blown fuse or poor power/ground feed to the circuit
- Aftermarket modifications or recent repairs disturbed the harness
Symptoms
- Malfunction Indicator Lamp (MIL) or transmission warning light illuminated
- Possible transmission overheating under heavy load (if cooler remains closed)
- Reduced transmission performance, limp-in mode, or limited shift strategy
- Stored DTC related to transmission control circuits
What to check
- Read stored freeze frame and related transmission codes with a scan tool
- Visual inspection of wiring and connectors from TCM/PCM to cooler solenoid/valve for damage, corrosion, or disconnection
- Check fuse(s) and power/ground circuits related to transmission control
- Backprobe the cooler control connector while commanding the circuit on/off with a scan tool
- Measure coil resistance of the cooler solenoid/valve and check continuity to module
Signal parameters
- Control output: PWM or switched 12 V signal from TCM/PCM (0–12 V depending on command)
- Expected coil resistance: typically ~5–30 ohms (vehicle-specific) — compare to spec
- Supply voltage at solenoid connector with key ON: ~12 V battery (or switched feed) on the power pin
- Ground continuity from solenoid ground to chassis ground: near 0 ohms
- When commanded ON by scan tool: voltage should change (switch to ground or apply duty) at the control pin
Diagnostic algorithm
- Use a scan tool to confirm P2753 and view freeze-frame/related codes. Clear codes and attempt to re-create.
- Visually inspect harness/connectors for the cooler control solenoid/valve and TCM/PCM connectors for damage or corrosion.
- Check relevant fuses and power feeds for continuity and battery voltage.
- Backprobe the control connector at the solenoid/valve. With key ON, check for battery power on the supply pin and proper ground on the ground pin.
- Command the cooler control ON/OFF with a scan tool while monitoring the control pin voltage. Verify the signal changes as commanded.
- Measure the resistance of the solenoid coil (unplugged). If open or outside spec, replace the solenoid/valve.
- Check continuity between the module control pin and the solenoid connector for opens/shorts; repair any damaged wiring.
- If wiring and solenoid are good but control signal is absent or incorrect, test/replace the TCM/PCM or repair module ground/power circuits following manufacturer procedures.
- After repairs, clear codes and perform road/test cycles to confirm the fault does not return.
Likely causes
- Damaged or disconnected wiring harness to the cooler solenoid/valve
- Corroded/loose connector at the cooler control solenoid
- Failed cooler control solenoid (open coil)
- Faulty module driver or intermittent connection
Fault status
Status
Transmission Fluid Cooler Control Circuit/Open detected (P2753). MIL set. Check circuit, connectors, and solenoid.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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