P0691
P0691: Engine Control Module (ECM) Output Circuit Malfunction
📖 What Does P0691 Mean?
Symptoms
- • Engine performance issues
- • poor fuel economy
- • rough idle
- • and intermittent stalling.
Common Causes
- • Faulty ECM output circuit
- • wiring damage
- • or a malfunctioning ECM.
Possible Solutions
1. Check the ECM output circuit for damage or corrosion. 2. Inspect and clean the wiring harness. 3. Replace the ECM if faulty.
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❓ Common Questions About P0691
Can I drive with code P0691?
You can drive for a short time, but should address code P0691 soon to avoid worsening the problem or failing an emissions test.
How much does it cost to fix P0691?
The estimated repair cost for code P0691 is between $100 and $500. This includes parts and labor for most makes and models.
Is this code easy to fix myself?
This repair is considered moderate. It may require specialized tools or significant disassembly. Professional help is recommended if you aren't an experienced DIYer.
Required Parts
Recommended Tools
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View Best Sellers ↗Related Diagnostic Codes
Other codes that may appear with P0691
P0689: Engine Control Module (ECM) Output Circuit Malfunction
P0690: Engine Control Module (ECM) Output Circuit Malfunction
P0692: Engine Control Module (ECM) Output Circuit Malfunction
P0693: Engine Control Module (ECM) Output Circuit Malfunction
💡 Why These Codes Are Related:
- • Similar Issues: Same root cause or component failure
- • Related Problems: Often occur together due to system interactions
- • Sequential Codes: Progressive failure stages or multiple sensors
- • Same System: Components within the same automotive system