Chrysler 13 MAP Sensor Vacuum Signal No Change
How to read it
Code 13 reads as 1 flash, pause, 3 flashes on the check-engine light. Cycle the ignition key on, off, on, off, then leave it on with the engine off, and count the flashes on the power loss or check-engine light.
New to flash codes? The How to Read Chrysler OBD-I Codes with the Key Cycle walks through the test and what the numbers mean. The general OBD-I guide covers the rest.
What does Chrysler code 13 mean?
MAP Sensor Vacuum Signal No Change
Common causes of 13
- Cracked or disconnected MAP sensor vacuum hose
- Blocked vacuum port or carbon in the MAP passage
- Failed MAP sensor with no output change
- Intake vacuum leak lowering manifold vacuum
How to fix 13
- Inspect the MAP vacuum hose for cracks and secure both ends
- Check the vacuum port for carbon or a blockage
- Read MAP voltage with the key on and compare idle against a snap throttle
- Apply known vacuum with a hand pump and watch for sensor change
- Replace the sensor only if it does not respond to vacuum
- Clear the code and retest on a road test
Sources and review
Review: qualified. Read the source limits below.
- Chrysler OBD-I trouble codes, model and year page
live reference page (troublecodes.net)
Supports: code identity and Chrysler meaning
Fetched directly from the linked model page. Single publisher, so the record is qualified, not verified. Causes and check order are curator-written from the circuit the code names.
- Chrysler OBD-I trouble codes, model and year page
live reference page (troublecodes.net)
Supports: code identity and Chrysler meaning
Fetched directly from the linked model page. Single publisher, so the record is qualified, not verified. Causes and check order are curator-written from the circuit the code names.
Last updated 2026-10-10.
Report a correction for 13. Include your vehicle, the issue and a source if you have one.