Pressure Control Solenoid B Control Circuit Open
The P0970 code means the vehicle's onboard diagnostic system has detected: Pressure Control Solenoid B Control Circuit Open. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- hard
- Estimated cost
- $150 - $600 (parts and labor)
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Common Symptoms
- Check Engine Light illuminated
- Oil pressure irregularity
- Engine performance reduced
- Possible idle quality issues
Probable Causes (Ranked by Likelihood)
- Failed pressure control solenoid B Very High
- Open circuit in solenoid B wiring High
- Disconnected or damaged connector at solenoid B Moderate
- ECM output driver failure for solenoid B Low
Step-by-Step Diagnostic Procedure
-
Locate pressure control solenoid B and check its connector
-
Measure solenoid B resistance with a multimeter
-
Test wiring continuity from ECM to solenoid B
-
Command solenoid B with a bidirectional scan tool
Frequently Asked Questions
What is pressure control solenoid B?
Solenoid B is a second pressure control solenoid that regulates oil pressure in a different circuit than solenoid A. Engines with multiple pressure control points use A and B solenoids for different functions.
Can I drive with solenoid B circuit open?
You can drive short distances, but the pressure circuit controlled by solenoid B will not function. The ECM may compensate, but engine protection is reduced.
Are solenoids A and B the same part?
They may be the same part number in some applications, but they serve different functions and are in different locations. Always verify the correct part for each position.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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