U1418low severityNetwork
Implausible Ambient Temperature Signal Received
on 2000 Dodge Caravan 3.3L V6 · FWD
What this code means
A module received an outside air temperature reading that is out of range or inconsistent with other sensors. This is typically a sensor or network data issue.
Symptoms
- Incorrect outside temp displayed
- HVAC performance issues
- Auto climate control errors
Common causes
- Faulty ambient air temperature sensor
- Wiring or connector fault at sensor
- CAN bus communication error
- Failed HVAC or body control module
Diagnostic steps
- Read ambient temp sensor value with scan tool
- Inspect sensor and wiring for damage
- Compare readings across modules
- Replace sensor if out of range
🔌 Don't have a code reader?
Any of these will read and clear this code — pick by how deep you want to go.
Budget handheld~$40
ANCEL AD410 →
No-phone-needed handheld — reads, clears, live data, freeze frame.
✓ ANCEL official store
Serious DIY~$100
BlueDriver Pro →
Enhanced codes (ABS, airbag, TPMS) plus repair reports.
SHOP FAVORITEShop-grade tablet~$300
Autel MaxiCOM MK808S →
Bidirectional tests, service resets, all systems.
✓ Autel official store
Pro diagnostics$1,500+
Autel MaxiSys MS906 Pro →
Full-system pro platform — topology mapping, ECU coding, the works.
✓ Autel official store
As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.
Other Network codes on this vehicle
U0001
High Speed CAN Communication Bus
U0002
High Speed CAN Communication Bus Performance
U0003
High Speed CAN Communication Bus (+) Open
U0004
High Speed CAN Communication Bus (+) Low
U0005
High Speed CAN Communication Bus (+) High
U0006
High Speed CAN Communication Bus (-) Open
U0007
High Speed CAN Communication Bus (-) Low
U0008
High Speed CAN Communication Bus (-) High
U0009
High Speed CAN Communication Bus Shorted Together
U0010
Medium Speed CAN Communication Bus