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C1791 Engine Code Repair

Meaning of C1791 engine trouble code is a kind of chassis 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.

C1791 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 C1791 code is occuring now you should check C1791 repair processes.
Now don't ask yourself; What should you do with C1791 code ?
The solution is here :

C1791 Possible Solution:

C1791 Engine

Power Steering Pressure (PSP) Switch Signal Malfunction The PCM counts the number of times vehicle speed transitions from 0 to a calibratable speed. After a calibratable number of speed transitions the PCM expects that the PSP input should have changed. This DTC is set if the transition is not detected. Vehicle towed with engine running Power steering hydraulic concern was repaired but DTC was not erased PSP switch/shorting bar damaged SIG RTN circuit open PSP circuit open or shorted to SIGRTN PCM damaged Check, if possible, if vehicle was towed or power steering service was performed. Observe PSP V PID while checking wires for intermittents.

C1791 Code Meaning :

C
OBD-II Diagnostic Chassis (C) Trouble Code For Engine

1
Fuel And Air Metering

7
Fuel Temperature Sensor B Circuit Range/Performance

9
Ignition/Distributor Engine Speed Input Circuit Malfunction

1
Shift Solenoid E Performance or Stuck Off

Regarding the C1791 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.

C1791 OBD-II Diagnostic Chassis (C) Trouble Code Description

C1791 engine trouble code is about Shift Solenoid E Performance or Stuck Off.

Main reason For C1791 Code

The reason of C1791 OBD-II Engine Trouble Code is Fuel Temperature Sensor B Circuit Range/Performance.

C1791 DTCs may also be triggered by faults earlier down the line. For example, a dirty MAF sensor might be causing the car to overcompensate in its fuel-trim adjustments. As a result, oxygen sensors are likely to report fuel mixture problems.