U0538 Code:

OBD-II Diagnostic Network (U) Trouble Code

Possible Cause

The most likely cause of U0538 code being stored is a defective automatic transmission cooler control valve or valve position sensor. Other causes may include corroded, open, or shorted wiring or connectors, a loose control module ground strap, or broken ground wire.

Common Symptoms

  1. Burned fluid is a certain indication that the transmission has been operated during a low fluid level condition and may have suffered catastrophic internal mechanical failure
  2. Engine and transmission ground cables, straps, and wires are sometimes left dangling after repairs are performed
  3. Some applications are equipped with up to 18 separate control modules. If you choose to tackle this monumental task, begin with a careful visual inspection of all system circuitry, connectors, and fuses
  4. There are several tools which will be instrumental in attempting to successfully diagnose the conditions which contribute to this code being stored

Similar Problems

Transmission
Crankshaft Position Sensor Circuit Performance
Kick-Down Switch Failed Short

U0538 Troubleshooting

If there is a clicking noise when you attempt to start the engine and the engine does not crank, it typically means there is something wrong with the battery, such as a low or discharged battery or corroded or loose battery cables. If the engine cranks when you attempt to start the car, but fails to turn over, this may mean there is a problem with the fuel or ignition. Other common reasons an engine may fail to start include a failure of the starter motor relay, a clogged fuel filter, a defective fuel pump or an ignition switch failure. U0538 the main thing to check is to verify the operation of the VCT solenoid. You're looking for a sticking or stuck VCt solenoid valve caused by contamination. Refer to vehicle specific repair manual to perform component tests for the VCT unit.

How to turn off U0538 check engine light ?

There are two ways to turn off the check engine light:

A repair technician can do so once repairs have been made.
The OBD II can automatically turn it off when it fails to detect the problem after several diagnostic cycles.

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