P1029
Intake Manifold Air Control Valve Position Sensor Upper Limit Not Reached
P1029 is an OBD-II diagnostic trouble code meaning: Intake Manifold Air Control Valve Position Sensor Upper Limit Not Reached. Common causes: valve position sensor malfunction, mechanical failure of the air control valve. Estimated repair cost: $17–56.
Symptoms
- Unstable engine idling
- Reduced engine power
- Increased fuel consumption
- Check Engine Light Illuminates
- Dips during acceleration
Causes
- Valve position sensor malfunction
- Mechanical failure of the air control valve
- Problems with wiring or connectors
- Valve dirty or stuck
- Malfunction of the engine control unit (rare)
How to Fix
- Check the continuity of the position sensor circuit
- Clean or replace air control valve
- Check and replace position sensor if necessary
- Check the operation of the engine control unit
- Reset the error code and check if it returns
Related codes
FAQ
What does the P1029 code mean?
P1029 is an OBD-II diagnostic trouble code that indicates: Intake Manifold Air Control Valve Position Sensor Upper Limit Not Reached
What causes a P1029 error code?
The most common causes of P1029 include: Valve position sensor malfunction; Mechanical failure of the air control valve; Problems with wiring or connectors; Valve dirty or stuck.
How do I fix a P1029 diagnostic trouble code?
To fix P1029: Check the continuity of the position sensor circuit. Clean or replace air control valve. Check and replace position sensor if necessary. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1029?
Yes, but get it checked soon
How much does it cost to fix P1029?
The estimated repair cost for P1029 is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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