Location of rough road sensor/sensors on a 2008 smart car

no engine told nor odometer miles. ouch or VIN.
P0318 (service) manual quote.
Driving over rough roads can cause engine speed variations that are similar to an engine Misfire condition and may cause false detection of a misfire. OBD II regulations allow the misfire detection test to be disabled for a short time while driving on rough road conditions.
or the 3.2L cam belt is SHOT (slipped)
read this 2 times for effect, P030x errors are masked.
allow the misfire detection test to be disabled


we get post here all the time, the no start posts
that the user never once looks at the dash IMMO lamp

and page page 2-20 in your free users guide.

it states

Immobilizer Operation
Your vehicle is equipped
with a passive
theft-deterrent system.
The system works when you turn the key to ON. The
key uses a transponder that matches an immobilizer
control unit in your vehicle. The correct key will start the
vehicle. If the key is ever damaged, you may not be
able to start your vehicle.
When trying to start the vehicle, if the engine does not
start and the security light comes on, the key may
have a damaged transponder. Turn the ignition off and
try again.
If the engine still does not start, and the key appears to
be undamaged, try another ignition key. At this time,
you may also want to check the fuse. See Fuses
and Circuit Breakers on page 5-96. If the engine still
does not start with the other key, your vehicle needs
service. If your vehicle does start, the first key may be
faulty. See your dealer who can service the
theft-deterrent system to have a new key made.
It is possible for the theft-deterrent system decoder to
learn the transponder value of a new or replacement
key. Up to 10 additional keys may be programmed for
the vehicle. This procedure is for learning additional
keys only.
Canadian Owners: If you lose or damage your keys,
only a GM dealer can service the theft-deterrent system
to have new keys made. To program additional keys
you will require two current driver's keys. You must add
a step to the following procedure. After Step 2, repeat
Steps 1 and 2 with the second current driver's key. Then
continue with Step 3.
To program a new key do the following:
1. Verify that the new key has PK3+ stamped on it.
2. Insert the current driver's key in the ignition
and start the engine. If the engine will not start see
your dealer for service.

also not scanning as you crank the engine ,you can miss imporant DTC errors. and never good that.
check all fuses
watch IMMO lamp
scan and crank.
do not throw parts as that invites, adding more bad parts<< oops,
check for spark on all cylinders.
check fuel pressure using a real gauge, for spec pressure, (dribble tests are useless)
PSI fuel is 4 answers, for 4 engines, in the service manual.
5.7L 43psi.
3.6 =52psi
2.8= 52 psi.
3.2> ???

3.2 is not chain drive.cam.

has belt drive cams. they can not be ignored ever.
if the cam belts slip (as all do ignored, the engine cannot start
and may cause silly 318 errors. from gross cam/crank relationship gross errors .





https://my.gm.ca/cadillac/en/content/dam/gmownercenter/gmna/GMCC/dynamic/2005/cadillac/cts/en/2005_Cadillac_CTS_Manual_en_CA.pdf


read the IMMO page fully one more time.

got 3.2L, , did you forget 60k mile service,?
Interference engine GM,. we never ignore this. or valves bend.

Nir, Check the attached links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
2006 Buick code links explanation.

P0318 OBD II Check Engine Code Rough Road GMC General Motors

U1300 OBD II Engine Code GMC General Motors

P1629 OBD II Check Engine Code GMC General Motors

P0318 Audi Rough Road Sensor Signal Circuit

If this is a cadillac, it is the rough road sensor. po318, if not just repost for your car make. God-Bless!
any car auto parts store will tell you where it is located, advanced auto, autozone, etc,

First one is shorted rough road detection sensor, second one is anti theft sensor

transmission input output sensor located in 2008 Dodge Caliber Google... There are many images on the net that show the location of the sensor in question.

The reason of P0318 OBD-II Engine Trouble Code is Throttle/Pedal Position Sensor/Switch A Circuit Intermittent.

With you removing the cat has caused all these problems.

P0041 Oxygen Sensor Signals Swapped Bank 1 Sensor 2/Bank 2 Sensor 2
looks like your wires and melted together or a rodent has chewed them

iam posting the hyundai code list i have that the vehicle manufacturer lists

P1100 Manifold Absolute Pressure Sensor Range/Performance

P1102 Manifold Absolute Pressure Sensor Circuit Low Input

P1103 Manifold Absolute Pressure Sensor Circuit High Input

P1123 Lang Term Fuel Trim Adaptive Too Lean

P1124 Long Term Fuel Trim Adaptive Too Rich

P1127 Long Term Fuel Trim Multiplier Too Rich

P1128 Long Term Fuel Trim Multiplier Too Lean

P1134 HO2S Bank 1 Sensor 1 Transition Time Switch (Bank 1 Sensor I)

P1154 HO2S Bank 2 Sensor 1 Transition Time Switch (Bank 2 Sensor 1)

P1166 HO2S Bank 1 Sensor 1 Controller Adaptive Diagnosis Fault (Bank 1)

P1167 HO2S Bank 1 Sensor 1 Controller Adaptive Diagnosis Fault (Bank 2)

P1168 HO2S Bank 1 Sensor 1 Heater Power Incorrect (Bank 1 Sensor 2)

P1169 HO2S Bank 1 Sensor 1 Heater Power incorrect (Bank 2 Sensor 2)

P1372 Segment Time Incorrect

P1400 Manifold Differential Pressure Sensor Circuit

P1440 EVAP System Vent Solenoid Circuit

P1443 EVAP System Fault (Fuel Tank Cap Missing)

P1510 Idle Control Valve Opening Circuit Shorted (Coil 1)

P1511 Idle Control Valve Command Signal Shorted (Coil 2)

P1513 Idle Air Control Valve Opening Coil Circuit Open (Coil 1)

P1521 Power Steering Switch Input Circuit

P1529 Customer Snapshot Request VIA CAN

P1552 Idle Air Control Valve Closing Coil Circuit Shorted

P1553 Idle Air Control Valve Closing Coil Circuit Open

P1586 Encoding Signal Circuit Not Rationale

P1602 Serial Communication Fault with Transmission Control Unit

P1605 Rough Road Sensor Circuit

P1606 Rough Road Sensor Circuit Not Valid

P1611 MIL Request Signal Circuit Low Input

P1613 ECU Self-Test Failed

P1614 MIL Request Signal Circuit High Input

P1616 Main Relay Fault

P1623 Diagnostic Lamp Power Stage Fault

P1624 MIL On Request Signal//Cooling Fan Relay Low Circuit

P1625 Cooling Fan Relay High Circuit

P1665 Power Stage Group 'A' Fault
P1670 Power Stage Group 'B' Fault