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U1993 Engine Code Repair

Meaning of U1993 engine trouble code is a kind of network trouble code and U1993 if your catalytic convertor fails completely, you eventually won't be able to keep the car running. Your gas mileage will also be terrible, so you should try and fix it as soon as you can. Unfortunately, the average replacement cost is around $2,140 and you can't do it yourself unless you're an experienced mechanic.

U1993 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 U1993 code is occuring now you should check U1993 repair processes.
Now don't ask yourself; What should you do with U1993 code ?
The solution is here :

U1993 Possible Solution:

U1993 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.

U1993 Code Meaning :

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

1
Fuel And Air Metering

9
Engine Oil Temperature Sensor Malfunction

9
Ignition/Distributor Engine Speed Input Circuit Malfunction

3
Glow Plug/Heater Circuit 'A' Malfunction

Is the fuel pump sometimes not priming when you turn the key to ON(II)? Start by measuring the fuel pressure and checking whether you have bright white-bluish spark at all four plugs. The mechanical timing is also something that you should check, as we mentioned above.

U1993 OBD-II Diagnostic Network (U) Trouble Code Description

U1993 engine trouble code is about Glow Plug/Heater Circuit 'A' Malfunction.

Main reason For U1993 Code

The reason of U1993 OBD-II Engine Trouble Code is Engine Oil Temperature Sensor Malfunction.

U1993 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.