U1798 Saab Auto Trouble Code
U1798 Saab Auto Trouble Code on vehicles with electronically controlled automatic transmissions, the 3-4 shift solenoid is responsible for actuating the hydraulic circuits to activate clutches or bands that change gears inside the automatic transmission.
The crank but won't start condition, along with the trouble codes may make you think you've got a PATS anti-theft system problem. However, Ford reports that these codes are all related to software bugs. The only way around the problem is to reprogram the PCM with the latest software.
U1798 Saab Possible Solution:
Excessive air inflow can be caused by a vacuum leak, a dirty sensor or, an exhaust gas recirculation valve not closing properly. If the problem is not enough fuel, the culprit may be dirty injectors or fuel filters, a weak fuel pump or a leaky fuel pressure regulator. The lean fuel mix error may be accompanied by rough idling, engine misfires, hesitation during acceleration and overall poor engine performance.
U1798 Saab Description For All Models :
- Saab 750
- Saab 9.3
- Saab 9.3 Ii
- Saab 9.5
- Saab 9.5 Ii
- Saab 90
- Saab 900
- Saab 9000
- Saab 9000i
- Saab 900i
- Saab 92
- Saab 9-2
- Saab 9-2x
- Saab 93
- Saab 9-3
- Saab 95
- Saab 9-5
- Saab 96
- Saab 9-7
- Saab 9-7x
- Saab 99
- Saab 9-x
- Saab Aero-x
- Saab Gt
- Saab Mc
- Saab Sonett
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U1798 Saab Trouble Repair :
With U1798 Saab code so start with the basics like a fuel pressure and fuel volume test. Or, you can start on the electrical side by doing a voltage drop on both the power and ground connections for the fuel pump. Some shops are reporting corrosion on the fuel pump ground that reduces power and fuel pressure. |
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