P122C Chevrolet Code - Intake Air Flow Valve Control Circuit Shorted
Quick Answer
The intake airflow valve of diesel engines reduces the intake air flow rate in part-load operation so that a higher exhaust gas recirculation rate can be achieved. Common causes include Faulty Throttle Body Assembly, Throttle Body Assembly harness is open or shorted, Throttle Body Assembly 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
- P122C Chevrolet indicates Intake Air Flow Valve Control Circuit Shorted.
- Common causes
- Common causes include Faulty Throttle Body Assembly, Throttle Body Assembly harness is open or shorted, Throttle Body Assembly 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 P122C Chevrolet Description
The Intake airflow valve assembly contains a contactless inductive throttle position sensing element that is managed by a customized integrated circuit. The valve position sensor is mounted within the valve body assembly and is not serviceable. The Engine Control Module (ECM) supplies the valve body with a 5 V reference circuit, a low reference circuit, an H-bridge motor directional control circuit, and an asynchronous signal/serial data circuit. The asynchronous signal means communication is only going from the intake airflow valve to the ECM. The Intake Air Flow Valve cannot receive data from the ECM over the signal/serial data circuit. The valve position sensor provides a signal voltage that changes relative to the valve blade angle. The valve position sensor information is transmitted between the Intake Air Flow Valve and the ECM on the signal/serial data circuit.
The valve may also be used to shut down the engine by closing the intake airflow valve and disabling the fuel injectors if the control module detects the engine speed is beyond the desired control limits. The Diagnostic Trouble Code (DTC) will be set if the ECM detects a high current short circuit on the intake airflow valve control circuit for greater than 0.5 s.
What are the Possible Causes of the DTC P122C Chevrolet?
- Faulty Throttle Body Assembly
- Throttle Body Assembly harness is open or shorted
- Throttle Body Assembly circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P122C Chevrolet?
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 P122C Chevrolet 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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Information for Specific Chevrolet Models
- P122C 2014 Chevrolet Silverado — Intake Air Flow Valve Control Circuit Shorted
- P122C 2015 Chevrolet Silverado — Intake Air Flow Valve Control Circuit Shorted
- P122C 2016 Chevrolet Silverado — Intake Air Flow Valve Control Circuit Shorted
- P122C 2017 Chevrolet Silverado — Intake Air Flow Valve Control Circuit Shorted
- P122C 2018 Chevrolet Silverado — Intake Air Flow Valve Control Circuit Shorted
Frequently Asked Questions about P122C Chevrolet Code
1. What are the common symptoms of OBDII code P122C in a Chevrolet related to the Intake Air Flow Valve Control Circuit Shorted?
Symptoms may include engine stalling, rough idling, decreased fuel efficiency, and a lack of power during acceleration.
2. What are the possible causes of the Intake Air Flow Valve Control Circuit Shorted code P122C in a Chevrolet?
Potential causes include a faulty intake air flow valve, damaged wiring or connectors in the circuit, a malfunctioning PCM, or a short circuit in the system.
3. How can I diagnose the Intake Air Flow Valve Control Circuit Shorted issue causing OBDII code P122C in my Chevrolet?
Diagnosis typically involves inspecting the intake air flow valve, checking the wiring and connectors for damage, performing a continuity test, and scanning the vehicle's computer for related error codes.
4. Can I continue driving my Chevrolet with the OBDII code P122C related to the Intake Air Flow Valve Control Circuit Shorted?
It is not recommended to drive the vehicle with this issue, as it can lead to further damage and potential safety hazards. Immediate attention and repair are advised.
5. How can I repair the Intake Air Flow Valve Control Circuit Shorted problem triggering OBDII code P122C in my Chevrolet?
Repair options may include replacing the intake air flow valve, repairing or replacing damaged wiring or connectors, resetting the PCM, and clearing the error code.
6. Are there any DIY tips for addressing the Intake Air Flow Valve Control Circuit Shorted code P122C in a Chevrolet?
While some basic diagnostics can be done at home, it is recommended to seek professional help for accurate diagnosis and repair of the issue to ensure safety and proper functioning of the vehicle.
7. Can a faulty intake air filter be a potential cause of the OBDII code P122C related to the Intake Air Flow Valve Control Circuit Shorted in a Chevrolet?
While a clogged or dirty air filter can impact engine performance, it is unlikely to directly cause the specific issue related to the intake air flow valve control circuit shorted code P122C.
8. Will resetting the check engine light make the OBDII code P122C disappear in a Chevrolet with the Intake Air Flow Valve Control Circuit Shorted problem?
Resetting the check engine light may temporarily clear the error code, but if the underlying issue causing the code is not addressed, the code is likely to reappear during subsequent driving cycles.
9. How much can I expect to pay for professional repairs related to the OBDII code P122C involving the Intake Air Flow Valve Control Circuit Shorted in a Chevrolet?
Costs for repairs can vary based on the extent of the issue, parts needed for replacement, labor rates, and location. It is advisable to obtain quotes from reputable mechanics or service centers for accurate estimates.
10. Is it possible for a loose connection in the intake air flow valve circuit to trigger the OBDII code P122C for a Chevrolet?
Yes, a loose or poor connection in the intake air flow valve control circuit can disrupt the proper functioning of the system, potentially leading to the detection of the Intake Air Flow Valve Control Circuit Shorted code P122C by the vehicle's computer.
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