P0370
Stop drivingYour engine's computer isn't getting a proper signal from a sensor that tracks engine timing, often the crankshaft position sensor.
Code P0370 means your engine's timing signal is faulty. Common causes: Crankshaft Position Sensor (70%), wiring issues (20%), Camshaft Position Sensor (8%). Drivability: No, stop driving. Repair cost: $30-$150 DIY, $130-$450 professional.
Can I Drive With P0370?
No, stop driving
Immediate repair needed
Stop driving immediately if: Engine stalls, engine won't start, significant power loss, or any unusual noises.
Symptoms of P0370
- 1Engine cranks but won't start
- 2Engine stalls unexpectedly while driving
- 3Rough idle or misfires
- 4Reduced engine power
- 5Check Engine Light is on
Common Causes of P0370
Parts most likely causing this code, ranked by probability
The CKP sensor provides the primary timing signal to the engine computer, and a malfunction here directly causes P0370.
70% of P0370 cases are fixed by replacing this part
Damaged, corroded, or loose wiring and connectors to the crankshaft or camshaft position sensor can interrupt the signal.
20% of P0370 cases are fixed by repairing wiring
While less common for P0370, a faulty CMP sensor can also cause timing signal issues, especially if it's the 'A' signal.
8% of P0370 cases are fixed by replacing this part
A damaged tone ring on the crankshaft or camshaft, or a rare internal ECM/PCM fault, can prevent the timing signal from being read correctly.
2% of P0370 cases are fixed by addressing these rare issues
Check These First (Before Buying Parts)
- Visually inspect the crankshaft position sensor and its wiring for any signs of damage, fraying, or loose connections.
- Check the sensor's electrical connector for corrosion or bent pins.
How to Diagnose P0370
- 1Visually inspect the crankshaft and camshaft position sensors and their wiring for any obvious damage, fraying, or loose connections.
- 2Check the sensor connectors for corrosion or bent pins.
- 3Use a multimeter to test for proper voltage supply and ground at the sensor connector.
- 4If possible, use an oscilloscope to check the signal output from the sensor while cranking the engine.
- 5Inspect the tone ring (reluctor wheel) on the crankshaft or camshaft for damage or debris.
P0370 on Popular Vehicles
Toyota Camry
2007-2024Crankshaft position sensor failures are common on these models, often around 100,000 miles. The sensor can become intermittent before complete failure.
75% fixed by replacing the CKP sensor
Honda Accord
2003-2024Similar to Toyota, the crankshaft position sensor is a frequent culprit. Wiring harness issues due to age and vibration are also seen.
70% fixed by replacing CKP sensor, 15% by wiring repair
Ford F-150
2004-2024Crankshaft position sensor failures are well-documented, sometimes exacerbated by heat from the engine. Always check the sensor's wiring for damage.
70% fixed by replacing CKP sensor, 20% by wiring repair
Frequently Asked Questions
What does P0370 mean?
P0370 indicates that your engine's computer is not receiving a correct high-resolution timing signal from a sensor, most often the crankshaft position sensor. This signal is crucial for the engine to know when to fire spark plugs and inject fuel.
Can I drive with P0370?
No, stop driving. This code often leads to a no-start condition or the engine stalling unexpectedly while driving. Driving with this code risks leaving you stranded and can cause further engine damage.
Will P0370 clear itself?
No, P0370 will not clear itself. This code points to a hard fault with a critical engine timing signal. The underlying issue must be diagnosed and repaired before the code can be cleared, either manually with a scan tool or after several drive cycles once the problem is fixed.
How do I fix P0370 myself?
Start by visually inspecting the crankshaft and camshaft position sensors and their wiring for damage. If the wiring looks good, you'll likely need to replace the faulty sensor, which is most often the crankshaft position sensor. You'll need basic hand tools and possibly a multimeter to confirm the sensor is bad.
How much does it cost to fix P0370?
If you do it yourself, replacing a crankshaft or camshaft position sensor typically costs $30-$150 for the part. If you take it to a shop, expect to pay $130-$450, which includes parts and 1-2 hours of labor.
P0370 keeps coming back - why?
If P0370 keeps returning, it means the root cause wasn't fully addressed. Common reasons include: faulty wiring that wasn't properly repaired, a new sensor that is also defective, a problem with the tone ring the sensor reads, or in rare cases, an issue with the engine's computer (ECM/PCM).
Will P0370 fail emissions/smog test?
Yes, P0370 will cause your vehicle to fail an emissions or smog test. The Check Engine Light will be on, which is an automatic failure in most states. Additionally, the engine's timing system is a critical component of emissions control.
What's the difference between P0370 and P0335?
P0370 indicates a 'Timing Reference High Resolution Signal 'A' Malfunction,' meaning the computer isn't getting the precise timing data it needs. P0335 specifically refers to a 'Crankshaft Position Sensor 'A' Circuit Malfunction,' which means there's a general electrical issue with the CKP sensor circuit, not necessarily just the high-resolution signal.
P0370 on Ford F-150?
On Ford F-150s, P0370 is most commonly caused by a failing crankshaft position sensor. These sensors can degrade over time, especially with heat exposure. Always check the wiring harness for chafing or corrosion near the sensor, as this is also a known issue on these trucks.
Questions to Ask Your Mechanic
Did you check the signal output from the crankshaft position sensor with an oscilloscope?
Good answer: Yes, we confirmed the signal was erratic/missing, indicating a faulty sensor or wiring.
What did you find when inspecting the wiring harness to the sensor?
Good answer: We found no visible damage or corrosion, and confirmed continuity and proper voltage supply.
Repair Cost Estimate
DIY Repair
Parts only
$30-$150
Shop Repair
Parts + labor
$130-$450
Save $100-$300 by doing it yourself
Difficulty
intermediate
Time
1-3 hours
Intermediate - requires some diagnostic tools like a multimeter and potentially getting under the vehicle, but the repair itself is often a bolt-on replacement.
Cost of Waiting
Ignoring P0370 means your engine will likely stall unexpectedly or fail to start. This can leave you stranded and, in some cases, lead to further engine damage if the timing signal is severely erratic, potentially causing misfires that damage your catalytic converter ($800-$2,500 repair).
While You're In There...
If the crankshaft position sensor is difficult to access, replacing both the CKP and CMP sensors at the same time can prevent future labor costs if the other sensor is nearing its end of life.
Tools You'll Need
- OBD-II scan tool
- Basic hand tools (sockets, wrenches)
- Multimeter
- Flashlight
- Jack and jack stands (if sensor is hard to access)
P0370 is a critical code, but it often points to a single failing sensor. Replacing the sensor is a common repair that will get your engine running reliably again.
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Your Next Steps
Step 1: Perform a thorough visual inspection of the crankshaft and camshaft position sensors and their wiring. Look for any cuts, chafing, or loose connections.
Step 2: If the visual inspection doesn't reveal the issue, use a multimeter to check for proper voltage supply and ground at the sensor connector. If power is present, test the sensor's output signal (ideally with an oscilloscope).
Step 3: If the sensor tests bad or shows no signal, replace the faulty sensor. Most often, this will be the crankshaft position sensor.