U1977 Engine Code Repair
Meaning of U1977 engine trouble code is a kind of network trouble code and when the check engine light comes U1977 code on the first you should check is the gas cap. Pull over, retighten it, and take a look at the cap to see if it has any cracks in it. Continue driving and see if the check engine light turns off. Alternately, you can purchase a gas cap for about $3 at an auto parts store. All you need to do is take the old one off and screw on the new one. If you've already made it to the store, you might as well just replace it. While not car-threatening, it's good to take care of this right away to improve gas mileage.
U1977 Fault Symptoms :
- Check engine light comes on
- Engine stalling or misfiring
- Engine performance issues
- Car not starting
If one of these reasons for U1977 code is occuring now you should check U1977 repair processes.
Now don't ask yourself; What should you do with U1977 code ?
The solution is here :
U1977 Possible Solution:
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.
U1977 Code Meaning :
U
OBD-II Diagnostic Network (U) Trouble Code For Engine
1
Fuel And Air Metering
9
Engine Oil Temperature Sensor Malfunction
7
Cylinder 4 Contribution/Balance Fault
7
Ignition Coil A Primary/Secondary Circuit Malfunction
The poor running symptoms are consistent with a MAP sensor malfunction. In addition, in some cases, a bad MAP sensor will not throw a code. Again, the ELD code likely represents a separate wiring issue.
U1977 OBD-II Diagnostic Network (U) Trouble Code DescriptionU1977 engine trouble code is about Ignition Coil A Primary/Secondary Circuit Malfunction.Main reason For U1977 CodeThe reason of U1977 OBD-II Engine Trouble Code is Engine Oil Temperature Sensor Malfunction. |
U1977 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.