U1197 Diagnostic Trouble Code

U1197 is a kind of OBD-II Diagnostic U-Network Diagnostic Trouble Code.

It is considered generic because it applies to all makes and models of vehicles, although specific repair steps may be different depending on your car model.

Symptoms

Symptoms of a U1197 diagnostic trouble code may include:

Poor fuel economy
Possible spark knock (detonation / pre-ignition)
Misfire
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.

Repair Processes :

Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness. Oxygen sensors signal the engine management computer the amount of oxygen present in the exhaust, which is used in determining and controlling the fuel ratio. You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data.

Process Tips

Diagnostic trouble code U1197 is not difficult to diagnose and repair. Thus, it always pays to have a qualified technician to look after your vehicle should this error code arise.

Diagnosing this code requires the engine to be in good running shape, without unmetered air entering the engine. If other codes that relates to misfiring condition, lean running or air entering the engine is present, then you must first fix those error codes before U1197.

Fortunately, U1197 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U1197 Trouble Code For Specific Cars

U1197 Mazda 600 Transmission Transfer Case Contact Plate 'D' Circuit Failure
U1197 Dodge Maxx Ignition Key-In Circuit Short To Ground
U1197 Sunbeam 30 Manifold Absolute Pressure/Barometric Pressure Circuit High Input
U1197 Lincoln Ls Throttle Position Sensor Disagreement btwn Sensors
U1197 Ac 428 A/C Water Pump Detection Circuit Failure
U1197 Suzuki Alto Memory 1 Switch Circuit Failure
U1197 Renault Gabbiano Glow Plug Circuit High Side Low Input