P0370 Code: Timing Reference Fault? Complete Rohnert Park Guide

P0370 - Timing Reference Fault. If you're seeing this code, your engine's timing signal system has detected a problem. With 4,000+ monthly searches, P0370 is less common than other codes but critical when it appears. As ASE-certified technicians in Rohnert Park with 25+ years of timing system experience, we've fixed thousands of P0370 issues. This guide explains P0370 and solutions.

What is P0370?

Your engine uses timing reference signals from crankshaft sensors or distributors to precisely time ignition firing. P0370 indicates the computer has detected a fault in the timing reference signal. This could be a missing signal, intermittent signal, or signal outside expected parameters. Your engine timing can't be controlled properly without this signal.

Symptoms of P0370

• Check engine light illuminated

• Hard starting or won't start

• Rough idle and hesitation

• Power loss during acceleration

• Stalling while driving

• Ignition timing off (detonation/knocking)

• Engine may not run at all on some vehicles

Common Causes of P0370 (Ranked by Probability)

1. Bad Crankshaft or Distributor Sensor (70%) - Most Affordable Fix

The sensor that sends timing signals has failed. Electronics have stopped working. This is the most common P0370 cause.

2. Timing Chain Stretch (20%) - Higher Investment

The timing chain has stretched with age, throwing off timing signals. Requires chain replacement (expensive but less common cause).

3. Wiring Issues (10%) - Low to Moderate Cost

The sensor's wiring is cut, corroded, or loose. Check for obvious damage around sensor area.

P0370 Repair Options in Rohnert Park

• **Crankshaft Sensor Replacement:** Most affordable fix

• **Distributor Replacement/Repair:** Moderate cost

• **Wiring Repair:** Low to moderate cost

• **Timing Chain Replacement:** Higher investment (if needed)

• **Professional Diagnosis:** FREE at Rohnert Park Transmission

• **Call (707) 584-7727 for an accurate quote based on your vehicle**

DIY vs Professional

Sensor Replacement: Difficulty 4-6/10 - Depends on vehicle location. Some easily accessible, others difficult.

Wiring Inspection: Difficulty 2/10 - Visual inspection. Basic.

Timing Chain Diagnosis: Difficulty 8/10 - Requires professional equipment and expertise.

Professional advantage: Diagnostic scanner confirms if it's sensor, timing, or electrical. Prevents expensive wrong repairs.

Next Steps

1. **Inspect Connections** - Look for loose or corroded connectors on crankshaft or distributor sensor.

2. **Get Professional Diagnosis** - Call (707) 584-7727 for computer scan and electrical testing.

3. **Schedule Service** - Most P0370 repairs complete same-day or next-day.

Conclusion

P0370 is usually solved by crankshaft sensor replacement. Occasionally timing chain stretch is the cause (more expensive), but professional diagnosis confirms this. Don't ignore timing faults - they affect engine operation and can cause damage. Contact Rohnert Park Transmission & Auto Repair at (707) 584-7727 for expert P0370 diagnosis and repair. Our ASE-certified technicians will quickly identify and fix the timing reference fault. Same-day appointments often available.