P1822 GMC Code - Internal Mode Switch Circuit 'B' Low
Quick Answer
With the engine runtime over 5 seconds, system voltage from 8-18v, Fuel Cutoff inactive, engine torque from 30-148 ft-lb (40-200 Nm), the Powertrain Control Module (PCM) detects that the Internal Mode Switch (IMS) signal indicated PARK for 2 seconds, and then the IMS indicated a transitional state between D2 and D1, conditions met for 5 seconds. Common causes include Faulty Internal Mode Switch (IMS), Internal Mode Switch (IMS) harness is open or shorted, Internal Mode Switch (IMS) circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1822 GMC indicates Internal Mode Switch Circuit 'B' Low.
- Common causes
- Common causes include Faulty Internal Mode Switch (IMS), Internal Mode Switch (IMS) harness is open or shorted, Internal Mode Switch (IMS) circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P1822 GMC Description
What are the Possible Causes of the DTC P1822 GMC?
- Faulty Internal Mode Switch (IMS)
- Internal Mode Switch (IMS) harness is open or shorted
- Internal Mode Switch (IMS) circuit poor electrical connection
How to Fix the DTC P1822 GMC?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1822 GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P1822 GMC Code
1. What does the OBDII code P1822 mean on a GMC vehicle?
P1822 indicates that the transmission's Internal Mode Switch (IMS) Circuit 'B' is reading a low voltage signal, which can interfere with proper gear selection.
2. What are the symptoms of code P1822 in a GMC?
Symptoms may include the transmission being stuck in a single gear, erratic shifting, the vehicle going into limp mode, or an illuminated check engine light.
3. What causes the P1822 code to appear on a GMC?
Common causes include a faulty Internal Mode Switch, damaged wiring or connectors in the IMS circuit, or issues with the transmission control module (TCM).
4. Can a dirty or corroded connector cause the P1822 code?
Yes, corroded or dirty electrical connectors in the IMS Circuit 'B' can disrupt the signal and trigger the P1822 code.
5. How is the P1822 code diagnosed in a GMC vehicle?
Diagnosis typically involves scanning for codes, inspecting the IMS and its wiring, checking for proper voltage and continuity, and possibly testing the transmission control module.
6. Is it safe to drive with a P1822 code on a GMC?
Driving with this code can be risky, as it may lead to erratic shifting or the vehicle being stuck in limp mode, which could reduce performance and safety.
7. How can the P1822 code be fixed on a GMC?
Repairs may include replacing the Internal Mode Switch, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the transmission control module.
8. What tools are needed to fix a P1822 code on a GMC?
Tools commonly needed include an OBDII scanner, a multimeter for voltage testing, and potentially specialized tools for accessing the transmission components.
9. Can a software issue trigger the P1822 code?
Yes, a software issue in the transmission control module (TCM) could potentially cause the P1822 code to appear and may require reprogramming.
10. How much does it typically cost to repair a P1822 code on a GMC?
Repair costs can vary but may range from $100 to $500 or more, depending on whether the issue is with the IMS, wiring, or TCM.
Discuss the causes and fixes for P1822 GMC OBDII Code
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