P1622 — Engine Coolant Temperature Signal Range Performance

What Does P1622 Mean?

P1622 is a manufacturer-specific diagnostic trouble code: Engine Coolant Temperature Signal Range Performance. This code applies to VOLKSWAGEN, BMW, MERCEDES, OTHER, MAZDA vehicles. Unlike generic OBD-II codes, manufacturer-specific codes are defined by the vehicle maker and may only apply to certain makes and models.

Symptoms of P1622

⚠️ Check Engine Light (MIL) illuminated
⚠️ Engine Coolant Temperature Signal Range not operating within expected parameters
⚠️ Reduced efficiency or performance of related system
⚠️ Reduced engine performance

Common Causes

🔍 Engine Coolant Temperature Signal Range degraded or contaminated
🔍 Mechanical wear or binding in Engine Coolant Temperature Signal Range
🔍 Incorrect Engine Coolant Temperature Signal Range installed (wrong part number)
🔍 Related system mechanical issue affecting Engine Coolant Temperature Signal Range readings

Frequently Asked Questions

What does P1622 mean?

P1622 indicates: Engine Coolant Temperature Signal Range Performance. The vehicle's computer has detected that the Engine Coolant Temperature Signal Range is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P1622?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P1622 for extended periods may cause additional problems.

How much does it cost to fix P1622?

Repair costs for P1622 typically range from $50 to $250, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

🔧 Inspect and clean Engine Coolant Temperature Signal Range
🔧 Replace degraded Engine Coolant Temperature Signal Range
🔧 Check for related mechanical issues affecting readings

1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

P1622: Engine Coolant Temperature Signal Range Performance