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U0797 Engine Code Repair

Meaning of U0797 engine trouble code is a kind of network trouble code and theoretically you can drive for a few weeks or even months with a broken MAF sensor. You will notice a decrease in gas mileage and over time the car will eventually start stalling a lot. At a shop, the replacement cost is between $240-$400 depending on the car, but that's usually the cost of parts because the labor is relatively simple.

U0797 Fault Symptoms :

  1. Check engine light comes on
  2. Engine stalling or misfiring
  3. Engine performance issues
  4. Car not starting

If one of these reasons for U0797 code is occuring now you should check U0797 repair processes.
Now don't ask yourself; What should you do with U0797 code ?
The solution is here :

U0797 Possible Solution:

U0797 Engine

Air Conditioning Pressure Sensor (ACP) Insufficient Pressure Change Each time the A/C clutch engages, the PCM is looking for a pressure change in the refrigerant. If the change in pressure is outside of the calibration the DTC will set. A/C system mechanical failure Open ACP or VREF circuit A/C sensor damaged A/C system electrical failure A/C clutch always engaged Verify A/C system function, including refrigerant charge.

U0797 Code Meaning :

U
OBD-II Diagnostic Network (U) Trouble Code For Engine

0
Intake Valve Control Solenoid Circuit Low

7
Fuel Temperature Sensor B Circuit Range/Performance

9
Ignition/Distributor Engine Speed Input Circuit Malfunction

7
Ignition Coil A Primary/Secondary Circuit Malfunction

Regarding the U0797 code, it would probably be worthwhile to carefully inspect the wire harness near the intake manifold bracket. This is done most easily from below the car in the area near the oil filter.

U0797 OBD-II Diagnostic Network (U) Trouble Code Description

U0797 engine trouble code is about Ignition Coil A Primary/Secondary Circuit Malfunction.

Main reason For U0797 Code

The reason of U0797 OBD-II Engine Trouble Code is Fuel Temperature Sensor B Circuit Range/Performance.

U0797 DTC specifically refers to the camshaft (cam) timing. In this case, if the cam timing is over-retarded, the engine light will be illluminated and the code will be set.