P181C
Internal Mode Switch 2 R1 Circuit Low Voltage
P181C is an OBD-II diagnostic trouble code meaning: Internal Mode Switch 2 R1 Circuit Low Voltage . Common causes: open or short circuit in the mode switch circuit, poor contact in circuit connectors. Estimated repair cost: $17–89.
Symptoms
- Incorrect gear shifting
- Check engine light comes on
- Transmission of the gearbox into emergency mode
- Problems determining the current transmission mode
- Difficulty switching between modes (P, R, N, D)
Causes
- Open or short circuit in the mode switch circuit
- Poor contact in circuit connectors
- Malfunction of the internal mode switch
- Transmission control module (TCM) problems
- Corroded or damaged wiring
How to Fix
- Check the integrity of the mode switch circuit
- Inspect and clean the contacts in the connectors
- Check the voltage at the mode switch
- If necessary, replace the internal mode switch
- Check and replace wiring harness if necessary
Related codes
FAQ
What does the P181C code mean?
P181C is an OBD-II diagnostic trouble code that indicates: Internal Mode Switch 2 R1 Circuit Low Voltage
What causes a P181C error code?
The most common causes of P181C include: Open or short circuit in the mode switch circuit; Poor contact in circuit connectors; Malfunction of the internal mode switch; Transmission control module (TCM) problems.
How do I fix a P181C diagnostic trouble code?
To fix P181C: Check the integrity of the mode switch circuit. Inspect and clean the contacts in the connectors. Check the voltage at the mode switch. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P181C?
Limited driving only, diagnose soon
How much does it cost to fix P181C?
The estimated repair cost for P181C is $17–89. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat